add package github.com/spf13/cobra

glide.lock

@@ -1,5 +1,5 @@
 hash: 367ad1f2515b51db9d04d5620fd88843fb6faabf303fe3103b896ef7a3f5a126
-updated: 2018-04-23T02:30:29.768749+08:00
+updated: 2018-04-23T02:33:52.913905+08:00
 imports:
 - name: github.com/armon/go-socks5
   version: e75332964ef517daa070d7c38a9466a0d687e0a5
@@ -17,6 +17,8 @@ imports:
   version: 5979233c5d6225d4a8e438cdd0b411888449ddab
 - name: github.com/gorilla/websocket
   version: ea4d1f681babbce9545c9c5f3d5194a789c89f5b
+- name: github.com/inconshreveable/mousetrap
+  version: 76626ae9c91c4f2a10f34cad8ce83ea42c93bb75
 - name: github.com/julienschmidt/httprouter
   version: 8a45e95fc75cb77048068a62daed98cc22fdac7c
 - name: github.com/klauspost/cpuid
@@ -35,6 +37,10 @@ imports:
   - fs
 - name: github.com/rodaine/table
   version: 212a2ad1c462ed4d5b5511ea2b480a573281dbbd
+- name: github.com/spf13/cobra
+  version: 615425954c3b0d9485a7027d4d451fdcdfdee84e
+- name: github.com/spf13/pflag
+  version: 583c0c0531f06d5278b7d917446061adc344b5cd
 - name: github.com/stretchr/testify
   version: 2402e8e7a02fc811447d11f881aa9746cdc57983
   subpackages:

vendor/github.com/inconshreveable/mousetrap/LICENSE

@@ -0,0 +1,13 @@
+Copyright 2014 Alan Shreve
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

vendor/github.com/inconshreveable/mousetrap/README.md

@@ -0,0 +1,23 @@
+# mousetrap
+
+mousetrap is a tiny library that answers a single question.
+
+On a Windows machine, was the process invoked by someone double clicking on
+the executable file while browsing in explorer?
+
+### Motivation
+
+Windows developers unfamiliar with command line tools will often "double-click"
+the executable for a tool. Because most CLI tools print the help and then exit
+when invoked without arguments, this is often very frustrating for those users.
+
+mousetrap provides a way to detect these invocations so that you can provide
+more helpful behavior and instructions on how to run the CLI tool. To see what
+this looks like, both from an organizational and a technical perspective, see
+https://inconshreveable.com/09-09-2014/sweat-the-small-stuff/
+
+### The interface
+
+The library exposes a single interface:
+
+    func StartedByExplorer() (bool)

vendor/github.com/inconshreveable/mousetrap/trap_others.go

@@ -0,0 +1,15 @@
+// +build !windows
+
+package mousetrap
+
+// StartedByExplorer returns true if the program was invoked by the user
+// double-clicking on the executable from explorer.exe
+//
+// It is conservative and returns false if any of the internal calls fail.
+// It does not guarantee that the program was run from a terminal. It only can tell you
+// whether it was launched from explorer.exe
+//
+// On non-Windows platforms, it always returns false.
+func StartedByExplorer() bool {
+	return false
+}

vendor/github.com/inconshreveable/mousetrap/trap_windows.go

@@ -0,0 +1,98 @@
+// +build windows
+// +build !go1.4
+
+package mousetrap
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+const (
+	// defined by the Win32 API
+	th32cs_snapprocess uintptr = 0x2
+)
+
+var (
+	kernel                   = syscall.MustLoadDLL("kernel32.dll")
+	CreateToolhelp32Snapshot = kernel.MustFindProc("CreateToolhelp32Snapshot")
+	Process32First           = kernel.MustFindProc("Process32FirstW")
+	Process32Next            = kernel.MustFindProc("Process32NextW")
+)
+
+// ProcessEntry32 structure defined by the Win32 API
+type processEntry32 struct {
+	dwSize              uint32
+	cntUsage            uint32
+	th32ProcessID       uint32
+	th32DefaultHeapID   int
+	th32ModuleID        uint32
+	cntThreads          uint32
+	th32ParentProcessID uint32
+	pcPriClassBase      int32
+	dwFlags             uint32
+	szExeFile           [syscall.MAX_PATH]uint16
+}
+
+func getProcessEntry(pid int) (pe *processEntry32, err error) {
+	snapshot, _, e1 := CreateToolhelp32Snapshot.Call(th32cs_snapprocess, uintptr(0))
+	if snapshot == uintptr(syscall.InvalidHandle) {
+		err = fmt.Errorf("CreateToolhelp32Snapshot: %v", e1)
+		return
+	}
+	defer syscall.CloseHandle(syscall.Handle(snapshot))
+
+	var processEntry processEntry32
+	processEntry.dwSize = uint32(unsafe.Sizeof(processEntry))
+	ok, _, e1 := Process32First.Call(snapshot, uintptr(unsafe.Pointer(&processEntry)))
+	if ok == 0 {
+		err = fmt.Errorf("Process32First: %v", e1)
+		return
+	}
+
+	for {
+		if processEntry.th32ProcessID == uint32(pid) {
+			pe = &processEntry
+			return
+		}
+
+		ok, _, e1 = Process32Next.Call(snapshot, uintptr(unsafe.Pointer(&processEntry)))
+		if ok == 0 {
+			err = fmt.Errorf("Process32Next: %v", e1)
+			return
+		}
+	}
+}
+
+func getppid() (pid int, err error) {
+	pe, err := getProcessEntry(os.Getpid())
+	if err != nil {
+		return
+	}
+
+	pid = int(pe.th32ParentProcessID)
+	return
+}
+
+// StartedByExplorer returns true if the program was invoked by the user double-clicking
+// on the executable from explorer.exe
+//
+// It is conservative and returns false if any of the internal calls fail.
+// It does not guarantee that the program was run from a terminal. It only can tell you
+// whether it was launched from explorer.exe
+func StartedByExplorer() bool {
+	ppid, err := getppid()
+	if err != nil {
+		return false
+	}
+
+	pe, err := getProcessEntry(ppid)
+	if err != nil {
+		return false
+	}
+
+	name := syscall.UTF16ToString(pe.szExeFile[:])
+	return name == "explorer.exe"
+}

vendor/github.com/inconshreveable/mousetrap/trap_windows_1.4.go

@@ -0,0 +1,46 @@
+// +build windows
+// +build go1.4
+
+package mousetrap
+
+import (
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+func getProcessEntry(pid int) (*syscall.ProcessEntry32, error) {
+	snapshot, err := syscall.CreateToolhelp32Snapshot(syscall.TH32CS_SNAPPROCESS, 0)
+	if err != nil {
+		return nil, err
+	}
+	defer syscall.CloseHandle(snapshot)
+	var procEntry syscall.ProcessEntry32
+	procEntry.Size = uint32(unsafe.Sizeof(procEntry))
+	if err = syscall.Process32First(snapshot, &procEntry); err != nil {
+		return nil, err
+	}
+	for {
+		if procEntry.ProcessID == uint32(pid) {
+			return &procEntry, nil
+		}
+		err = syscall.Process32Next(snapshot, &procEntry)
+		if err != nil {
+			return nil, err
+		}
+	}
+}
+
+// StartedByExplorer returns true if the program was invoked by the user double-clicking
+// on the executable from explorer.exe
+//
+// It is conservative and returns false if any of the internal calls fail.
+// It does not guarantee that the program was run from a terminal. It only can tell you
+// whether it was launched from explorer.exe
+func StartedByExplorer() bool {
+	pe, err := getProcessEntry(os.Getppid())
+	if err != nil {
+		return false
+	}
+	return "explorer.exe" == syscall.UTF16ToString(pe.ExeFile[:])
+}

vendor/github.com/spf13/cobra/.circleci/config.yml

@@ -0,0 +1,38 @@
+workflows:
+  version: 2
+  main:
+    jobs:
+      - go-current
+      - go-previous
+      - go-latest
+base: &base
+  working_directory: /go/src/github.com/spf13/cobra
+  steps:
+    - checkout
+    - run:
+        name: "All Commands"
+        command: |
+          mkdir -p bin
+          curl -Lso bin/shellcheck https://github.com/caarlos0/shellcheck-docker/releases/download/v0.4.3/shellcheck
+          chmod +x bin/shellcheck
+          go get -t -v ./...
+          PATH=$PATH:$PWD/bin go test -v ./...
+          go build
+          diff -u <(echo -n) <(gofmt -d -s .)
+          if [ -z $NOVET ]; then
+            diff -u <(echo -n) <(go tool vet . 2>&1 | grep -vE 'ExampleCommand|bash_completions.*Fprint');
+          fi
+version: 2
+jobs:
+  go-current:
+    docker:
+      - image: circleci/golang:1.10.0
+    <<: *base
+  go-previous:
+    docker:
+      - image: circleci/golang:1.9.4
+    <<: *base
+  go-latest:
+    docker:
+      - image: circleci/golang:latest
+    <<: *base

vendor/github.com/spf13/cobra/.gitignore

@@ -0,0 +1,36 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+# Vim files https://github.com/github/gitignore/blob/master/Global/Vim.gitignore
+# swap
+[._]*.s[a-w][a-z]
+[._]s[a-w][a-z]
+# session
+Session.vim
+# temporary
+.netrwhist
+*~
+# auto-generated tag files
+tags
+
+*.exe
+
+cobra.test

vendor/github.com/spf13/cobra/.mailmap

@@ -0,0 +1,3 @@
+Steve Francia <steve.francia@gmail.com>
+Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
+Fabiano Franz <ffranz@redhat.com>                   <contact@fabianofranz.com>

vendor/github.com/spf13/cobra/.travis.yml

@@ -0,0 +1,21 @@
+language: go
+
+matrix:
+  include:
+    - go: 1.9.4
+    - go: 1.10.0
+    - go: tip
+  allow_failures:
+    - go: tip
+
+before_install:
+  - mkdir -p bin
+  - curl -Lso bin/shellcheck https://github.com/caarlos0/shellcheck-docker/releases/download/v0.4.3/shellcheck
+  - chmod +x bin/shellcheck
+script:
+  - PATH=$PATH:$PWD/bin go test -v ./...
+  - go build
+  - diff -u <(echo -n) <(gofmt -d -s .)
+  - if [ -z $NOVET ]; then
+      diff -u <(echo -n) <(go tool vet . 2>&1 | grep -vE 'ExampleCommand|bash_completions.*Fprint');
+    fi

vendor/github.com/spf13/cobra/LICENSE.txt

@@ -0,0 +1,174 @@
+                                Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      including but not limited to software source code, documentation
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+
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+
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+   2. Grant of Copyright License. Subject to the terms and conditions of
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
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vendor/github.com/spf13/cobra/README.md

@@ -0,0 +1,736 @@
+![cobra logo](https://cloud.githubusercontent.com/assets/173412/10886352/ad566232-814f-11e5-9cd0-aa101788c117.png)
+
+Cobra is both a library for creating powerful modern CLI applications as well as a program to generate applications and command files.
+
+Many of the most widely used Go projects are built using Cobra including:
+
+* [Kubernetes](http://kubernetes.io/)
+* [Hugo](http://gohugo.io)
+* [rkt](https://github.com/coreos/rkt)
+* [etcd](https://github.com/coreos/etcd)
+* [Moby (former Docker)](https://github.com/moby/moby)
+* [Docker (distribution)](https://github.com/docker/distribution)
+* [OpenShift](https://www.openshift.com/)
+* [Delve](https://github.com/derekparker/delve)
+* [GopherJS](http://www.gopherjs.org/)
+* [CockroachDB](http://www.cockroachlabs.com/)
+* [Bleve](http://www.blevesearch.com/)
+* [ProjectAtomic (enterprise)](http://www.projectatomic.io/)
+* [GiantSwarm's swarm](https://github.com/giantswarm/cli)
+* [Nanobox](https://github.com/nanobox-io/nanobox)/[Nanopack](https://github.com/nanopack)
+* [rclone](http://rclone.org/)
+* [nehm](https://github.com/bogem/nehm)
+* [Pouch](https://github.com/alibaba/pouch)
+
+[![Build Status](https://travis-ci.org/spf13/cobra.svg "Travis CI status")](https://travis-ci.org/spf13/cobra)
+[![CircleCI status](https://circleci.com/gh/spf13/cobra.png?circle-token=:circle-token "CircleCI status")](https://circleci.com/gh/spf13/cobra)
+[![GoDoc](https://godoc.org/github.com/spf13/cobra?status.svg)](https://godoc.org/github.com/spf13/cobra)
+
+# Table of Contents
+
+- [Overview](#overview)
+- [Concepts](#concepts)
+  * [Commands](#commands)
+  * [Flags](#flags)
+- [Installing](#installing)
+- [Getting Started](#getting-started)
+  * [Using the Cobra Generator](#using-the-cobra-generator)
+  * [Using the Cobra Library](#using-the-cobra-library)
+  * [Working with Flags](#working-with-flags)
+  * [Positional and Custom Arguments](#positional-and-custom-arguments)
+  * [Example](#example)
+  * [Help Command](#help-command)
+  * [Usage Message](#usage-message)
+  * [PreRun and PostRun Hooks](#prerun-and-postrun-hooks)
+  * [Suggestions when "unknown command" happens](#suggestions-when-unknown-command-happens)
+  * [Generating documentation for your command](#generating-documentation-for-your-command)
+  * [Generating bash completions](#generating-bash-completions)
+- [Contributing](#contributing)
+- [License](#license)
+
+# Overview
+
+Cobra is a library providing a simple interface to create powerful modern CLI
+interfaces similar to git & go tools.
+
+Cobra is also an application that will generate your application scaffolding to rapidly
+develop a Cobra-based application.
+
+Cobra provides:
+* Easy subcommand-based CLIs: `app server`, `app fetch`, etc.
+* Fully POSIX-compliant flags (including short & long versions)
+* Nested subcommands
+* Global, local and cascading flags
+* Easy generation of applications & commands with `cobra init appname` & `cobra add cmdname`
+* Intelligent suggestions (`app srver`... did you mean `app server`?)
+* Automatic help generation for commands and flags
+* Automatic help flag recognition of `-h`, `--help`, etc.
+* Automatically generated bash autocomplete for your application
+* Automatically generated man pages for your application
+* Command aliases so you can change things without breaking them
+* The flexibility to define your own help, usage, etc.
+* Optional tight integration with [viper](http://github.com/spf13/viper) for 12-factor apps
+
+# Concepts
+
+Cobra is built on a structure of commands, arguments & flags.
+
+**Commands** represent actions, **Args** are things and **Flags** are modifiers for those actions.
+
+The best applications will read like sentences when used. Users will know how
+to use the application because they will natively understand how to use it.
+
+The pattern to follow is
+`APPNAME VERB NOUN --ADJECTIVE.`
+    or
+`APPNAME COMMAND ARG --FLAG`
+
+A few good real world examples may better illustrate this point.
+
+In the following example, 'server' is a command, and 'port' is a flag:
+
+    hugo server --port=1313
+
+In this command we are telling Git to clone the url bare.
+
+    git clone URL --bare
+
+## Commands
+
+Command is the central point of the application. Each interaction that
+the application supports will be contained in a Command. A command can
+have children commands and optionally run an action.
+
+In the example above, 'server' is the command.
+
+[More about cobra.Command](https://godoc.org/github.com/spf13/cobra#Command)
+
+## Flags
+
+A flag is a way to modify the behavior of a command. Cobra supports
+fully POSIX-compliant flags as well as the Go [flag package](https://golang.org/pkg/flag/).
+A Cobra command can define flags that persist through to children commands
+and flags that are only available to that command.
+
+In the example above, 'port' is the flag.
+
+Flag functionality is provided by the [pflag
+library](https://github.com/spf13/pflag), a fork of the flag standard library
+which maintains the same interface while adding POSIX compliance.
+
+# Installing
+Using Cobra is easy. First, use `go get` to install the latest version
+of the library. This command will install the `cobra` generator executable
+along with the library and its dependencies:
+
+    go get -u github.com/spf13/cobra/cobra
+
+Next, include Cobra in your application:
+
+```go
+import "github.com/spf13/cobra"
+```
+
+# Getting Started
+
+While you are welcome to provide your own organization, typically a Cobra-based
+application will follow the following organizational structure:
+
+```
+  ▾ appName/
+    ▾ cmd/
+        add.go
+        your.go
+        commands.go
+        here.go
+      main.go
+```
+
+In a Cobra app, typically the main.go file is very bare. It serves one purpose: initializing Cobra.
+
+```go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "{pathToYourApp}/cmd"
+)
+
+func main() {
+  cmd.Execute()
+}
+```
+
+## Using the Cobra Generator
+
+Cobra provides its own program that will create your application and add any
+commands you want. It's the easiest way to incorporate Cobra into your application.
+
+[Here](https://github.com/spf13/cobra/blob/master/cobra/README.md) you can find more information about it.
+
+## Using the Cobra Library
+
+To manually implement Cobra you need to create a bare main.go file and a rootCmd file.
+You will optionally provide additional commands as you see fit.
+
+### Create rootCmd
+
+Cobra doesn't require any special constructors. Simply create your commands.
+
+Ideally you place this in app/cmd/root.go:
+
+```go
+var rootCmd = &cobra.Command{
+  Use:   "hugo",
+  Short: "Hugo is a very fast static site generator",
+  Long: `A Fast and Flexible Static Site Generator built with
+                love by spf13 and friends in Go.
+                Complete documentation is available at http://hugo.spf13.com`,
+  Run: func(cmd *cobra.Command, args []string) {
+    // Do Stuff Here
+  },
+}
+
+func Execute() {
+  if err := rootCmd.Execute(); err != nil {
+    fmt.Println(err)
+    os.Exit(1)
+  }
+}
+```
+
+You will additionally define flags and handle configuration in your init() function.
+
+For example cmd/root.go:
+
+```go
+import (
+  "fmt"
+  "os"
+
+  homedir "github.com/mitchellh/go-homedir"
+  "github.com/spf13/cobra"
+  "github.com/spf13/viper"
+)
+
+func init() {
+  cobra.OnInitialize(initConfig)
+  rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cobra.yaml)")
+  rootCmd.PersistentFlags().StringVarP(&projectBase, "projectbase", "b", "", "base project directory eg. github.com/spf13/")
+  rootCmd.PersistentFlags().StringP("author", "a", "YOUR NAME", "Author name for copyright attribution")
+  rootCmd.PersistentFlags().StringVarP(&userLicense, "license", "l", "", "Name of license for the project (can provide `licensetext` in config)")
+  rootCmd.PersistentFlags().Bool("viper", true, "Use Viper for configuration")
+  viper.BindPFlag("author", rootCmd.PersistentFlags().Lookup("author"))
+  viper.BindPFlag("projectbase", rootCmd.PersistentFlags().Lookup("projectbase"))
+  viper.BindPFlag("useViper", rootCmd.PersistentFlags().Lookup("viper"))
+  viper.SetDefault("author", "NAME HERE <EMAIL ADDRESS>")
+  viper.SetDefault("license", "apache")
+}
+
+func initConfig() {
+  // Don't forget to read config either from cfgFile or from home directory!
+  if cfgFile != "" {
+    // Use config file from the flag.
+    viper.SetConfigFile(cfgFile)
+  } else {
+    // Find home directory.
+    home, err := homedir.Dir()
+    if err != nil {
+      fmt.Println(err)
+      os.Exit(1)
+    }
+
+    // Search config in home directory with name ".cobra" (without extension).
+    viper.AddConfigPath(home)
+    viper.SetConfigName(".cobra")
+  }
+
+  if err := viper.ReadInConfig(); err != nil {
+    fmt.Println("Can't read config:", err)
+    os.Exit(1)
+  }
+}
+```
+
+### Create your main.go
+
+With the root command you need to have your main function execute it.
+Execute should be run on the root for clarity, though it can be called on any command.
+
+In a Cobra app, typically the main.go file is very bare. It serves, one purpose, to initialize Cobra.
+
+```go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "{pathToYourApp}/cmd"
+)
+
+func main() {
+  cmd.Execute()
+}
+```
+
+### Create additional commands
+
+Additional commands can be defined and typically are each given their own file
+inside of the cmd/ directory.
+
+If you wanted to create a version command you would create cmd/version.go and
+populate it with the following:
+
+```go
+package cmd
+
+import (
+  "fmt"
+
+  "github.com/spf13/cobra"
+)
+
+func init() {
+  rootCmd.AddCommand(versionCmd)
+}
+
+var versionCmd = &cobra.Command{
+  Use:   "version",
+  Short: "Print the version number of Hugo",
+  Long:  `All software has versions. This is Hugo's`,
+  Run: func(cmd *cobra.Command, args []string) {
+    fmt.Println("Hugo Static Site Generator v0.9 -- HEAD")
+  },
+}
+```
+
+## Working with Flags
+
+Flags provide modifiers to control how the action command operates.
+
+### Assign flags to a command
+
+Since the flags are defined and used in different locations, we need to
+define a variable outside with the correct scope to assign the flag to
+work with.
+
+```go
+var Verbose bool
+var Source string
+```
+
+There are two different approaches to assign a flag.
+
+### Persistent Flags
+
+A flag can be 'persistent' meaning that this flag will be available to the
+command it's assigned to as well as every command under that command. For
+global flags, assign a flag as a persistent flag on the root.
+
+```go
+rootCmd.PersistentFlags().BoolVarP(&Verbose, "verbose", "v", false, "verbose output")
+```
+
+### Local Flags
+
+A flag can also be assigned locally which will only apply to that specific command.
+
+```go
+rootCmd.Flags().StringVarP(&Source, "source", "s", "", "Source directory to read from")
+```
+
+### Local Flag on Parent Commands
+
+By default Cobra only parses local flags on the target command, any local flags on
+parent commands are ignored. By enabling `Command.TraverseChildren` Cobra will
+parse local flags on each command before executing the target command.
+
+```go
+command := cobra.Command{
+  Use: "print [OPTIONS] [COMMANDS]",
+  TraverseChildren: true,
+}
+```
+
+### Bind Flags with Config
+
+You can also bind your flags with [viper](https://github.com/spf13/viper):
+```go
+var author string
+
+func init() {
+  rootCmd.PersistentFlags().StringVar(&author, "author", "YOUR NAME", "Author name for copyright attribution")
+  viper.BindPFlag("author", rootCmd.PersistentFlags().Lookup("author"))
+}
+```
+
+In this example the persistent flag `author` is bound with `viper`.
+**Note**, that the variable `author` will not be set to the value from config,
+when the `--author` flag is not provided by user.
+
+More in [viper documentation](https://github.com/spf13/viper#working-with-flags).
+
+### Required flags
+
+Flags are optional by default. If instead you wish your command to report an error
+when a flag has not been set, mark it as required:
+```go
+rootCmd.Flags().StringVarP(&Region, "region", "r", "", "AWS region (required)")
+rootCmd.MarkFlagRequired("region")
+```
+
+## Positional and Custom Arguments
+
+Validation of positional arguments can be specified using the `Args` field
+of `Command`.
+
+The following validators are built in:
+
+- `NoArgs` - the command will report an error if there are any positional args.
+- `ArbitraryArgs` - the command will accept any args.
+- `OnlyValidArgs` - the command will report an error if there are any positional args that are not in the `ValidArgs` field of `Command`.
+- `MinimumNArgs(int)` - the command will report an error if there are not at least N positional args.
+- `MaximumNArgs(int)` - the command will report an error if there are more than N positional args.
+- `ExactArgs(int)` - the command will report an error if there are not exactly N positional args.
+- `RangeArgs(min, max)` - the command will report an error if the number of args is not between the minimum and maximum number of expected args.
+
+An example of setting the custom validator:
+
+```go
+var cmd = &cobra.Command{
+  Short: "hello",
+  Args: func(cmd *cobra.Command, args []string) error {
+    if len(args) < 1 {
+      return errors.New("requires at least one arg")
+    }
+    if myapp.IsValidColor(args[0]) {
+      return nil
+    }
+    return fmt.Errorf("invalid color specified: %s", args[0])
+  },
+  Run: func(cmd *cobra.Command, args []string) {
+    fmt.Println("Hello, World!")
+  },
+}
+```
+
+## Example
+
+In the example below, we have defined three commands. Two are at the top level
+and one (cmdTimes) is a child of one of the top commands. In this case the root
+is not executable meaning that a subcommand is required. This is accomplished
+by not providing a 'Run' for the 'rootCmd'.
+
+We have only defined one flag for a single command.
+
+More documentation about flags is available at https://github.com/spf13/pflag
+
+```go
+package main
+
+import (
+  "fmt"
+  "strings"
+
+  "github.com/spf13/cobra"
+)
+
+func main() {
+  var echoTimes int
+
+  var cmdPrint = &cobra.Command{
+    Use:   "print [string to print]",
+    Short: "Print anything to the screen",
+    Long: `print is for printing anything back to the screen.
+For many years people have printed back to the screen.`,
+    Args: cobra.MinimumNArgs(1),
+    Run: func(cmd *cobra.Command, args []string) {
+      fmt.Println("Print: " + strings.Join(args, " "))
+    },
+  }
+
+  var cmdEcho = &cobra.Command{
+    Use:   "echo [string to echo]",
+    Short: "Echo anything to the screen",
+    Long: `echo is for echoing anything back.
+Echo works a lot like print, except it has a child command.`,
+    Args: cobra.MinimumNArgs(1),
+    Run: func(cmd *cobra.Command, args []string) {
+      fmt.Println("Print: " + strings.Join(args, " "))
+    },
+  }
+
+  var cmdTimes = &cobra.Command{
+    Use:   "times [# times] [string to echo]",
+    Short: "Echo anything to the screen more times",
+    Long: `echo things multiple times back to the user by providing
+a count and a string.`,
+    Args: cobra.MinimumNArgs(1),
+    Run: func(cmd *cobra.Command, args []string) {
+      for i := 0; i < echoTimes; i++ {
+        fmt.Println("Echo: " + strings.Join(args, " "))
+      }
+    },
+  }
+
+  cmdTimes.Flags().IntVarP(&echoTimes, "times", "t", 1, "times to echo the input")
+
+  var rootCmd = &cobra.Command{Use: "app"}
+  rootCmd.AddCommand(cmdPrint, cmdEcho)
+  cmdEcho.AddCommand(cmdTimes)
+  rootCmd.Execute()
+}
+```
+
+For a more complete example of a larger application, please checkout [Hugo](http://gohugo.io/).
+
+## Help Command
+
+Cobra automatically adds a help command to your application when you have subcommands.
+This will be called when a user runs 'app help'. Additionally, help will also
+support all other commands as input. Say, for instance, you have a command called
+'create' without any additional configuration; Cobra will work when 'app help
+create' is called.  Every command will automatically have the '--help' flag added.
+
+### Example
+
+The following output is automatically generated by Cobra. Nothing beyond the
+command and flag definitions are needed.
+
+    $ cobra help
+
+    Cobra is a CLI library for Go that empowers applications.
+    This application is a tool to generate the needed files
+    to quickly create a Cobra application.
+
+    Usage:
+      cobra [command]
+
+    Available Commands:
+      add         Add a command to a Cobra Application
+      help        Help about any command
+      init        Initialize a Cobra Application
+
+    Flags:
+      -a, --author string    author name for copyright attribution (default "YOUR NAME")
+          --config string    config file (default is $HOME/.cobra.yaml)
+      -h, --help             help for cobra
+      -l, --license string   name of license for the project
+          --viper            use Viper for configuration (default true)
+
+    Use "cobra [command] --help" for more information about a command.
+
+
+Help is just a command like any other. There is no special logic or behavior
+around it. In fact, you can provide your own if you want.
+
+### Defining your own help
+
+You can provide your own Help command or your own template for the default command to use
+with following functions:
+
+```go
+cmd.SetHelpCommand(cmd *Command)
+cmd.SetHelpFunc(f func(*Command, []string))
+cmd.SetHelpTemplate(s string)
+```
+
+The latter two will also apply to any children commands.
+
+## Usage Message
+
+When the user provides an invalid flag or invalid command, Cobra responds by
+showing the user the 'usage'.
+
+### Example
+You may recognize this from the help above. That's because the default help
+embeds the usage as part of its output.
+
+    $ cobra --invalid
+    Error: unknown flag: --invalid
+    Usage:
+      cobra [command]
+
+    Available Commands:
+      add         Add a command to a Cobra Application
+      help        Help about any command
+      init        Initialize a Cobra Application
+
+    Flags:
+      -a, --author string    author name for copyright attribution (default "YOUR NAME")
+          --config string    config file (default is $HOME/.cobra.yaml)
+      -h, --help             help for cobra
+      -l, --license string   name of license for the project
+          --viper            use Viper for configuration (default true)
+
+    Use "cobra [command] --help" for more information about a command.
+
+### Defining your own usage
+You can provide your own usage function or template for Cobra to use.
+Like help, the function and template are overridable through public methods:
+
+```go
+cmd.SetUsageFunc(f func(*Command) error)
+cmd.SetUsageTemplate(s string)
+```
+
+## Version Flag
+
+Cobra adds a top-level '--version' flag if the Version field is set on the root command.
+Running an application with the '--version' flag will print the version to stdout using
+the version template. The template can be customized using the
+`cmd.SetVersionTemplate(s string)` function.
+
+## PreRun and PostRun Hooks
+
+It is possible to run functions before or after the main `Run` function of your command. The `PersistentPreRun` and `PreRun` functions will be executed before `Run`. `PersistentPostRun` and `PostRun` will be executed after `Run`.  The `Persistent*Run` functions will be inherited by children if they do not declare their own.  These functions are run in the following order:
+
+- `PersistentPreRun`
+- `PreRun`
+- `Run`
+- `PostRun`
+- `PersistentPostRun`
+
+An example of two commands which use all of these features is below.  When the subcommand is executed, it will run the root command's `PersistentPreRun` but not the root command's `PersistentPostRun`:
+
+```go
+package main
+
+import (
+  "fmt"
+
+  "github.com/spf13/cobra"
+)
+
+func main() {
+
+  var rootCmd = &cobra.Command{
+    Use:   "root [sub]",
+    Short: "My root command",
+    PersistentPreRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside rootCmd PersistentPreRun with args: %v\n", args)
+    },
+    PreRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside rootCmd PreRun with args: %v\n", args)
+    },
+    Run: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside rootCmd Run with args: %v\n", args)
+    },
+    PostRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside rootCmd PostRun with args: %v\n", args)
+    },
+    PersistentPostRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside rootCmd PersistentPostRun with args: %v\n", args)
+    },
+  }
+
+  var subCmd = &cobra.Command{
+    Use:   "sub [no options!]",
+    Short: "My subcommand",
+    PreRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside subCmd PreRun with args: %v\n", args)
+    },
+    Run: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside subCmd Run with args: %v\n", args)
+    },
+    PostRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside subCmd PostRun with args: %v\n", args)
+    },
+    PersistentPostRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside subCmd PersistentPostRun with args: %v\n", args)
+    },
+  }
+
+  rootCmd.AddCommand(subCmd)
+
+  rootCmd.SetArgs([]string{""})
+  rootCmd.Execute()
+  fmt.Println()
+  rootCmd.SetArgs([]string{"sub", "arg1", "arg2"})
+  rootCmd.Execute()
+}
+```
+
+Output:
+```
+Inside rootCmd PersistentPreRun with args: []
+Inside rootCmd PreRun with args: []
+Inside rootCmd Run with args: []
+Inside rootCmd PostRun with args: []
+Inside rootCmd PersistentPostRun with args: []
+
+Inside rootCmd PersistentPreRun with args: [arg1 arg2]
+Inside subCmd PreRun with args: [arg1 arg2]
+Inside subCmd Run with args: [arg1 arg2]
+Inside subCmd PostRun with args: [arg1 arg2]
+Inside subCmd PersistentPostRun with args: [arg1 arg2]
+```
+
+## Suggestions when "unknown command" happens
+
+Cobra will print automatic suggestions when "unknown command" errors happen. This allows Cobra to behave similarly to the `git` command when a typo happens. For example:
+
+```
+$ hugo srever
+Error: unknown command "srever" for "hugo"
+
+Did you mean this?
+        server
+
+Run 'hugo --help' for usage.
+```
+
+Suggestions are automatic based on every subcommand registered and use an implementation of [Levenshtein distance](http://en.wikipedia.org/wiki/Levenshtein_distance). Every registered command that matches a minimum distance of 2 (ignoring case) will be displayed as a suggestion.
+
+If you need to disable suggestions or tweak the string distance in your command, use:
+
+```go
+command.DisableSuggestions = true
+```
+
+or
+
+```go
+command.SuggestionsMinimumDistance = 1
+```
+
+You can also explicitly set names for which a given command will be suggested using the `SuggestFor` attribute. This allows suggestions for strings that are not close in terms of string distance, but makes sense in your set of commands and for some which you don't want aliases. Example:
+
+```
+$ kubectl remove
+Error: unknown command "remove" for "kubectl"
+
+Did you mean this?
+        delete
+
+Run 'kubectl help' for usage.
+```
+
+## Generating documentation for your command
+
+Cobra can generate documentation based on subcommands, flags, etc. in the following formats:
+
+- [Markdown](doc/md_docs.md)
+- [ReStructured Text](doc/rest_docs.md)
+- [Man Page](doc/man_docs.md)
+
+## Generating bash completions
+
+Cobra can generate a bash-completion file. If you add more information to your command, these completions can be amazingly powerful and flexible.  Read more about it in [Bash Completions](bash_completions.md).
+
+# Contributing
+
+1. Fork it
+2. Download your fork to your PC (`git clone https://github.com/your_username/cobra && cd cobra`)
+3. Create your feature branch (`git checkout -b my-new-feature`)
+4. Make changes and add them (`git add .`)
+5. Commit your changes (`git commit -m 'Add some feature'`)
+6. Push to the branch (`git push origin my-new-feature`)
+7. Create new pull request
+
+# License
+
+Cobra is released under the Apache 2.0 license. See [LICENSE.txt](https://github.com/spf13/cobra/blob/master/LICENSE.txt)

vendor/github.com/spf13/cobra/args.go

@@ -0,0 +1,89 @@
+package cobra
+
+import (
+	"fmt"
+)
+
+type PositionalArgs func(cmd *Command, args []string) error
+
+// Legacy arg validation has the following behaviour:
+// - root commands with no subcommands can take arbitrary arguments
+// - root commands with subcommands will do subcommand validity checking
+// - subcommands will always accept arbitrary arguments
+func legacyArgs(cmd *Command, args []string) error {
+	// no subcommand, always take args
+	if !cmd.HasSubCommands() {
+		return nil
+	}
+
+	// root command with subcommands, do subcommand checking.
+	if !cmd.HasParent() && len(args) > 0 {
+		return fmt.Errorf("unknown command %q for %q%s", args[0], cmd.CommandPath(), cmd.findSuggestions(args[0]))
+	}
+	return nil
+}
+
+// NoArgs returns an error if any args are included.
+func NoArgs(cmd *Command, args []string) error {
+	if len(args) > 0 {
+		return fmt.Errorf("unknown command %q for %q", args[0], cmd.CommandPath())
+	}
+	return nil
+}
+
+// OnlyValidArgs returns an error if any args are not in the list of ValidArgs.
+func OnlyValidArgs(cmd *Command, args []string) error {
+	if len(cmd.ValidArgs) > 0 {
+		for _, v := range args {
+			if !stringInSlice(v, cmd.ValidArgs) {
+				return fmt.Errorf("invalid argument %q for %q%s", v, cmd.CommandPath(), cmd.findSuggestions(args[0]))
+			}
+		}
+	}
+	return nil
+}
+
+// ArbitraryArgs never returns an error.
+func ArbitraryArgs(cmd *Command, args []string) error {
+	return nil
+}
+
+// MinimumNArgs returns an error if there is not at least N args.
+func MinimumNArgs(n int) PositionalArgs {
+	return func(cmd *Command, args []string) error {
+		if len(args) < n {
+			return fmt.Errorf("requires at least %d arg(s), only received %d", n, len(args))
+		}
+		return nil
+	}
+}
+
+// MaximumNArgs returns an error if there are more than N args.
+func MaximumNArgs(n int) PositionalArgs {
+	return func(cmd *Command, args []string) error {
+		if len(args) > n {
+			return fmt.Errorf("accepts at most %d arg(s), received %d", n, len(args))
+		}
+		return nil
+	}
+}
+
+// ExactArgs returns an error if there are not exactly n args.
+func ExactArgs(n int) PositionalArgs {
+	return func(cmd *Command, args []string) error {
+		if len(args) != n {
+			return fmt.Errorf("accepts %d arg(s), received %d", n, len(args))
+		}
+		return nil
+	}
+}
+
+// RangeArgs returns an error if the number of args is not within the expected range.
+func RangeArgs(min int, max int) PositionalArgs {
+	return func(cmd *Command, args []string) error {
+		if len(args) < min || len(args) > max {
+			return fmt.Errorf("accepts between %d and %d arg(s), received %d", min, max, len(args))
+		}
+		return nil
+	}
+}

vendor/github.com/spf13/cobra/args_test.go

@@ -0,0 +1,241 @@
+package cobra
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestNoArgs(t *testing.T) {
+	c := &Command{Use: "c", Args: NoArgs, Run: emptyRun}
+
+	output, err := executeCommand(c)
+	if output != "" {
+		t.Errorf("Unexpected string: %v", output)
+	}
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+}
+
+func TestNoArgsWithArgs(t *testing.T) {
+	c := &Command{Use: "c", Args: NoArgs, Run: emptyRun}
+
+	_, err := executeCommand(c, "illegal")
+	if err == nil {
+		t.Fatal("Expected an error")
+	}
+
+	got := err.Error()
+	expected := `unknown command "illegal" for "c"`
+	if got != expected {
+		t.Errorf("Expected: %q, got: %q", expected, got)
+	}
+}
+
+func TestOnlyValidArgs(t *testing.T) {
+	c := &Command{
+		Use:       "c",
+		Args:      OnlyValidArgs,
+		ValidArgs: []string{"one", "two"},
+		Run:       emptyRun,
+	}
+
+	output, err := executeCommand(c, "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+}
+
+func TestOnlyValidArgsWithInvalidArgs(t *testing.T) {
+	c := &Command{
+		Use:       "c",
+		Args:      OnlyValidArgs,
+		ValidArgs: []string{"one", "two"},
+		Run:       emptyRun,
+	}
+
+	_, err := executeCommand(c, "three")
+	if err == nil {
+		t.Fatal("Expected an error")
+	}
+
+	got := err.Error()
+	expected := `invalid argument "three" for "c"`
+	if got != expected {
+		t.Errorf("Expected: %q, got: %q", expected, got)
+	}
+}
+
+func TestArbitraryArgs(t *testing.T) {
+	c := &Command{Use: "c", Args: ArbitraryArgs, Run: emptyRun}
+	output, err := executeCommand(c, "a", "b")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+}
+
+func TestMinimumNArgs(t *testing.T) {
+	c := &Command{Use: "c", Args: MinimumNArgs(2), Run: emptyRun}
+	output, err := executeCommand(c, "a", "b", "c")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+}
+
+func TestMinimumNArgsWithLessArgs(t *testing.T) {
+	c := &Command{Use: "c", Args: MinimumNArgs(2), Run: emptyRun}
+	_, err := executeCommand(c, "a")
+
+	if err == nil {
+		t.Fatal("Expected an error")
+	}
+
+	got := err.Error()
+	expected := "requires at least 2 arg(s), only received 1"
+	if got != expected {
+		t.Fatalf("Expected %q, got %q", expected, got)
+	}
+}
+
+func TestMaximumNArgs(t *testing.T) {
+	c := &Command{Use: "c", Args: MaximumNArgs(3), Run: emptyRun}
+	output, err := executeCommand(c, "a", "b")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+}
+
+func TestMaximumNArgsWithMoreArgs(t *testing.T) {
+	c := &Command{Use: "c", Args: MaximumNArgs(2), Run: emptyRun}
+	_, err := executeCommand(c, "a", "b", "c")
+
+	if err == nil {
+		t.Fatal("Expected an error")
+	}
+
+	got := err.Error()
+	expected := "accepts at most 2 arg(s), received 3"
+	if got != expected {
+		t.Fatalf("Expected %q, got %q", expected, got)
+	}
+}
+
+func TestExactArgs(t *testing.T) {
+	c := &Command{Use: "c", Args: ExactArgs(3), Run: emptyRun}
+	output, err := executeCommand(c, "a", "b", "c")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+}
+
+func TestExactArgsWithInvalidCount(t *testing.T) {
+	c := &Command{Use: "c", Args: ExactArgs(2), Run: emptyRun}
+	_, err := executeCommand(c, "a", "b", "c")
+
+	if err == nil {
+		t.Fatal("Expected an error")
+	}
+
+	got := err.Error()
+	expected := "accepts 2 arg(s), received 3"
+	if got != expected {
+		t.Fatalf("Expected %q, got %q", expected, got)
+	}
+}
+
+func TestRangeArgs(t *testing.T) {
+	c := &Command{Use: "c", Args: RangeArgs(2, 4), Run: emptyRun}
+	output, err := executeCommand(c, "a", "b", "c")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+}
+
+func TestRangeArgsWithInvalidCount(t *testing.T) {
+	c := &Command{Use: "c", Args: RangeArgs(2, 4), Run: emptyRun}
+	_, err := executeCommand(c, "a")
+
+	if err == nil {
+		t.Fatal("Expected an error")
+	}
+
+	got := err.Error()
+	expected := "accepts between 2 and 4 arg(s), received 1"
+	if got != expected {
+		t.Fatalf("Expected %q, got %q", expected, got)
+	}
+}
+
+func TestRootTakesNoArgs(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{Use: "child", Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+
+	_, err := executeCommand(rootCmd, "illegal", "args")
+	if err == nil {
+		t.Fatal("Expected an error")
+	}
+
+	got := err.Error()
+	expected := `unknown command "illegal" for "root"`
+	if !strings.Contains(got, expected) {
+		t.Errorf("expected %q, got %q", expected, got)
+	}
+}
+
+func TestRootTakesArgs(t *testing.T) {
+	rootCmd := &Command{Use: "root", Args: ArbitraryArgs, Run: emptyRun}
+	childCmd := &Command{Use: "child", Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+
+	_, err := executeCommand(rootCmd, "legal", "args")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+}
+
+func TestChildTakesNoArgs(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{Use: "child", Args: NoArgs, Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+
+	_, err := executeCommand(rootCmd, "child", "illegal", "args")
+	if err == nil {
+		t.Fatal("Expected an error")
+	}
+
+	got := err.Error()
+	expected := `unknown command "illegal" for "root child"`
+	if !strings.Contains(got, expected) {
+		t.Errorf("expected %q, got %q", expected, got)
+	}
+}
+
+func TestChildTakesArgs(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{Use: "child", Args: ArbitraryArgs, Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+
+	_, err := executeCommand(rootCmd, "child", "legal", "args")
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+}

vendor/github.com/spf13/cobra/bash_completions.go

@@ -0,0 +1,555 @@
+package cobra
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"sort"
+	"strings"
+
+	"github.com/spf13/pflag"
+)
+
+// Annotations for Bash completion.
+const (
+	BashCompFilenameExt     = "cobra_annotation_bash_completion_filename_extensions"
+	BashCompCustom          = "cobra_annotation_bash_completion_custom"
+	BashCompOneRequiredFlag = "cobra_annotation_bash_completion_one_required_flag"
+	BashCompSubdirsInDir    = "cobra_annotation_bash_completion_subdirs_in_dir"
+)
+
+func writePreamble(buf *bytes.Buffer, name string) {
+	buf.WriteString(fmt.Sprintf("# bash completion for %-36s -*- shell-script -*-\n", name))
+	buf.WriteString(fmt.Sprintf(`
+__%[1]s_debug()
+{
+    if [[ -n ${BASH_COMP_DEBUG_FILE} ]]; then
+        echo "$*" >> "${BASH_COMP_DEBUG_FILE}"
+    fi
+}
+
+# Homebrew on Macs have version 1.3 of bash-completion which doesn't include
+# _init_completion. This is a very minimal version of that function.
+__%[1]s_init_completion()
+{
+    COMPREPLY=()
+    _get_comp_words_by_ref "$@" cur prev words cword
+}
+
+__%[1]s_index_of_word()
+{
+    local w word=$1
+    shift
+    index=0
+    for w in "$@"; do
+        [[ $w = "$word" ]] && return
+        index=$((index+1))
+    done
+    index=-1
+}
+
+__%[1]s_contains_word()
+{
+    local w word=$1; shift
+    for w in "$@"; do
+        [[ $w = "$word" ]] && return
+    done
+    return 1
+}
+
+__%[1]s_handle_reply()
+{
+    __%[1]s_debug "${FUNCNAME[0]}"
+    case $cur in
+        -*)
+            if [[ $(type -t compopt) = "builtin" ]]; then
+                compopt -o nospace
+            fi
+            local allflags
+            if [ ${#must_have_one_flag[@]} -ne 0 ]; then
+                allflags=("${must_have_one_flag[@]}")
+            else
+                allflags=("${flags[*]} ${two_word_flags[*]}")
+            fi
+            COMPREPLY=( $(compgen -W "${allflags[*]}" -- "$cur") )
+            if [[ $(type -t compopt) = "builtin" ]]; then
+                [[ "${COMPREPLY[0]}" == *= ]] || compopt +o nospace
+            fi
+
+            # complete after --flag=abc
+            if [[ $cur == *=* ]]; then
+                if [[ $(type -t compopt) = "builtin" ]]; then
+                    compopt +o nospace
+                fi
+
+                local index flag
+                flag="${cur%%=*}"
+                __%[1]s_index_of_word "${flag}" "${flags_with_completion[@]}"
+                COMPREPLY=()
+                if [[ ${index} -ge 0 ]]; then
+                    PREFIX=""
+                    cur="${cur#*=}"
+                    ${flags_completion[${index}]}
+                    if [ -n "${ZSH_VERSION}" ]; then
+                        # zsh completion needs --flag= prefix
+                        eval "COMPREPLY=( \"\${COMPREPLY[@]/#/${flag}=}\" )"
+                    fi
+                fi
+            fi
+            return 0;
+            ;;
+    esac
+
+    # check if we are handling a flag with special work handling
+    local index
+    __%[1]s_index_of_word "${prev}" "${flags_with_completion[@]}"
+    if [[ ${index} -ge 0 ]]; then
+        ${flags_completion[${index}]}
+        return
+    fi
+
+    # we are parsing a flag and don't have a special handler, no completion
+    if [[ ${cur} != "${words[cword]}" ]]; then
+        return
+    fi
+
+    local completions
+    completions=("${commands[@]}")
+    if [[ ${#must_have_one_noun[@]} -ne 0 ]]; then
+        completions=("${must_have_one_noun[@]}")
+    fi
+    if [[ ${#must_have_one_flag[@]} -ne 0 ]]; then
+        completions+=("${must_have_one_flag[@]}")
+    fi
+    COMPREPLY=( $(compgen -W "${completions[*]}" -- "$cur") )
+
+    if [[ ${#COMPREPLY[@]} -eq 0 && ${#noun_aliases[@]} -gt 0 && ${#must_have_one_noun[@]} -ne 0 ]]; then
+        COMPREPLY=( $(compgen -W "${noun_aliases[*]}" -- "$cur") )
+    fi
+
+    if [[ ${#COMPREPLY[@]} -eq 0 ]]; then
+        declare -F __custom_func >/dev/null && __custom_func
+    fi
+
+    # available in bash-completion >= 2, not always present on macOS
+    if declare -F __ltrim_colon_completions >/dev/null; then
+        __ltrim_colon_completions "$cur"
+    fi
+
+    # If there is only 1 completion and it is a flag with an = it will be completed
+    # but we don't want a space after the =
+    if [[ "${#COMPREPLY[@]}" -eq "1" ]] && [[ $(type -t compopt) = "builtin" ]] && [[ "${COMPREPLY[0]}" == --*= ]]; then
+       compopt -o nospace
+    fi
+}
+
+# The arguments should be in the form "ext1|ext2|extn"
+__%[1]s_handle_filename_extension_flag()
+{
+    local ext="$1"
+    _filedir "@(${ext})"
+}
+
+__%[1]s_handle_subdirs_in_dir_flag()
+{
+    local dir="$1"
+    pushd "${dir}" >/dev/null 2>&1 && _filedir -d && popd >/dev/null 2>&1
+}
+
+__%[1]s_handle_flag()
+{
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    # if a command required a flag, and we found it, unset must_have_one_flag()
+    local flagname=${words[c]}
+    local flagvalue
+    # if the word contained an =
+    if [[ ${words[c]} == *"="* ]]; then
+        flagvalue=${flagname#*=} # take in as flagvalue after the =
+        flagname=${flagname%%=*} # strip everything after the =
+        flagname="${flagname}=" # but put the = back
+    fi
+    __%[1]s_debug "${FUNCNAME[0]}: looking for ${flagname}"
+    if __%[1]s_contains_word "${flagname}" "${must_have_one_flag[@]}"; then
+        must_have_one_flag=()
+    fi
+
+    # if you set a flag which only applies to this command, don't show subcommands
+    if __%[1]s_contains_word "${flagname}" "${local_nonpersistent_flags[@]}"; then
+      commands=()
+    fi
+
+    # keep flag value with flagname as flaghash
+    # flaghash variable is an associative array which is only supported in bash > 3.
+    if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then
+        if [ -n "${flagvalue}" ] ; then
+            flaghash[${flagname}]=${flagvalue}
+        elif [ -n "${words[ $((c+1)) ]}" ] ; then
+            flaghash[${flagname}]=${words[ $((c+1)) ]}
+        else
+            flaghash[${flagname}]="true" # pad "true" for bool flag
+        fi
+    fi
+
+    # skip the argument to a two word flag
+    if __%[1]s_contains_word "${words[c]}" "${two_word_flags[@]}"; then
+        c=$((c+1))
+        # if we are looking for a flags value, don't show commands
+        if [[ $c -eq $cword ]]; then
+            commands=()
+        fi
+    fi
+
+    c=$((c+1))
+
+}
+
+__%[1]s_handle_noun()
+{
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    if __%[1]s_contains_word "${words[c]}" "${must_have_one_noun[@]}"; then
+        must_have_one_noun=()
+    elif __%[1]s_contains_word "${words[c]}" "${noun_aliases[@]}"; then
+        must_have_one_noun=()
+    fi
+
+    nouns+=("${words[c]}")
+    c=$((c+1))
+}
+
+__%[1]s_handle_command()
+{
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    local next_command
+    if [[ -n ${last_command} ]]; then
+        next_command="_${last_command}_${words[c]//:/__}"
+    else
+        if [[ $c -eq 0 ]]; then
+            next_command="_%[1]s_root_command"
+        else
+            next_command="_${words[c]//:/__}"
+        fi
+    fi
+    c=$((c+1))
+    __%[1]s_debug "${FUNCNAME[0]}: looking for ${next_command}"
+    declare -F "$next_command" >/dev/null && $next_command
+}
+
+__%[1]s_handle_word()
+{
+    if [[ $c -ge $cword ]]; then
+        __%[1]s_handle_reply
+        return
+    fi
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+    if [[ "${words[c]}" == -* ]]; then
+        __%[1]s_handle_flag
+    elif __%[1]s_contains_word "${words[c]}" "${commands[@]}"; then
+        __%[1]s_handle_command
+    elif [[ $c -eq 0 ]]; then
+        __%[1]s_handle_command
+    else
+        __%[1]s_handle_noun
+    fi
+    __%[1]s_handle_word
+}
+
+`, name))
+}
+
+func writePostscript(buf *bytes.Buffer, name string) {
+	name = strings.Replace(name, ":", "__", -1)
+	buf.WriteString(fmt.Sprintf("__start_%s()\n", name))
+	buf.WriteString(fmt.Sprintf(`{
+    local cur prev words cword
+    declare -A flaghash 2>/dev/null || :
+    if declare -F _init_completion >/dev/null 2>&1; then
+        _init_completion -s || return
+    else
+        __%[1]s_init_completion -n "=" || return
+    fi
+
+    local c=0
+    local flags=()
+    local two_word_flags=()
+    local local_nonpersistent_flags=()
+    local flags_with_completion=()
+    local flags_completion=()
+    local commands=("%[1]s")
+    local must_have_one_flag=()
+    local must_have_one_noun=()
+    local last_command
+    local nouns=()
+
+    __%[1]s_handle_word
+}
+
+`, name))
+	buf.WriteString(fmt.Sprintf(`if [[ $(type -t compopt) = "builtin" ]]; then
+    complete -o default -F __start_%s %s
+else
+    complete -o default -o nospace -F __start_%s %s
+fi
+
+`, name, name, name, name))
+	buf.WriteString("# ex: ts=4 sw=4 et filetype=sh\n")
+}
+
+func writeCommands(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    commands=()\n")
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c == cmd.helpCommand {
+			continue
+		}
+		buf.WriteString(fmt.Sprintf("    commands+=(%q)\n", c.Name()))
+	}
+	buf.WriteString("\n")
+}
+
+func writeFlagHandler(buf *bytes.Buffer, name string, annotations map[string][]string, cmd *Command) {
+	for key, value := range annotations {
+		switch key {
+		case BashCompFilenameExt:
+			buf.WriteString(fmt.Sprintf("    flags_with_completion+=(%q)\n", name))
+
+			var ext string
+			if len(value) > 0 {
+				ext = fmt.Sprintf("__%s_handle_filename_extension_flag ", cmd.Root().Name()) + strings.Join(value, "|")
+			} else {
+				ext = "_filedir"
+			}
+			buf.WriteString(fmt.Sprintf("    flags_completion+=(%q)\n", ext))
+		case BashCompCustom:
+			buf.WriteString(fmt.Sprintf("    flags_with_completion+=(%q)\n", name))
+			if len(value) > 0 {
+				handlers := strings.Join(value, "; ")
+				buf.WriteString(fmt.Sprintf("    flags_completion+=(%q)\n", handlers))
+			} else {
+				buf.WriteString("    flags_completion+=(:)\n")
+			}
+		case BashCompSubdirsInDir:
+			buf.WriteString(fmt.Sprintf("    flags_with_completion+=(%q)\n", name))
+
+			var ext string
+			if len(value) == 1 {
+				ext = fmt.Sprintf("__%s_handle_subdirs_in_dir_flag ", cmd.Root().Name()) + value[0]
+			} else {
+				ext = "_filedir -d"
+			}
+			buf.WriteString(fmt.Sprintf("    flags_completion+=(%q)\n", ext))
+		}
+	}
+}
+
+func writeShortFlag(buf *bytes.Buffer, flag *pflag.Flag, cmd *Command) {
+	name := flag.Shorthand
+	format := "    "
+	if len(flag.NoOptDefVal) == 0 {
+		format += "two_word_"
+	}
+	format += "flags+=(\"-%s\")\n"
+	buf.WriteString(fmt.Sprintf(format, name))
+	writeFlagHandler(buf, "-"+name, flag.Annotations, cmd)
+}
+
+func writeFlag(buf *bytes.Buffer, flag *pflag.Flag, cmd *Command) {
+	name := flag.Name
+	format := "    flags+=(\"--%s"
+	if len(flag.NoOptDefVal) == 0 {
+		format += "="
+	}
+	format += "\")\n"
+	buf.WriteString(fmt.Sprintf(format, name))
+	writeFlagHandler(buf, "--"+name, flag.Annotations, cmd)
+}
+
+func writeLocalNonPersistentFlag(buf *bytes.Buffer, flag *pflag.Flag) {
+	name := flag.Name
+	format := "    local_nonpersistent_flags+=(\"--%s"
+	if len(flag.NoOptDefVal) == 0 {
+		format += "="
+	}
+	format += "\")\n"
+	buf.WriteString(fmt.Sprintf(format, name))
+}
+
+func writeFlags(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString(`    flags=()
+    two_word_flags=()
+    local_nonpersistent_flags=()
+    flags_with_completion=()
+    flags_completion=()
+
+`)
+	localNonPersistentFlags := cmd.LocalNonPersistentFlags()
+	cmd.NonInheritedFlags().VisitAll(func(flag *pflag.Flag) {
+		if nonCompletableFlag(flag) {
+			return
+		}
+		writeFlag(buf, flag, cmd)
+		if len(flag.Shorthand) > 0 {
+			writeShortFlag(buf, flag, cmd)
+		}
+		if localNonPersistentFlags.Lookup(flag.Name) != nil {
+			writeLocalNonPersistentFlag(buf, flag)
+		}
+	})
+	cmd.InheritedFlags().VisitAll(func(flag *pflag.Flag) {
+		if nonCompletableFlag(flag) {
+			return
+		}
+		writeFlag(buf, flag, cmd)
+		if len(flag.Shorthand) > 0 {
+			writeShortFlag(buf, flag, cmd)
+		}
+	})
+
+	buf.WriteString("\n")
+}
+
+func writeRequiredFlag(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    must_have_one_flag=()\n")
+	flags := cmd.NonInheritedFlags()
+	flags.VisitAll(func(flag *pflag.Flag) {
+		if nonCompletableFlag(flag) {
+			return
+		}
+		for key := range flag.Annotations {
+			switch key {
+			case BashCompOneRequiredFlag:
+				format := "    must_have_one_flag+=(\"--%s"
+				if flag.Value.Type() != "bool" {
+					format += "="
+				}
+				format += "\")\n"
+				buf.WriteString(fmt.Sprintf(format, flag.Name))
+
+				if len(flag.Shorthand) > 0 {
+					buf.WriteString(fmt.Sprintf("    must_have_one_flag+=(\"-%s\")\n", flag.Shorthand))
+				}
+			}
+		}
+	})
+}
+
+func writeRequiredNouns(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    must_have_one_noun=()\n")
+	sort.Sort(sort.StringSlice(cmd.ValidArgs))
+	for _, value := range cmd.ValidArgs {
+		buf.WriteString(fmt.Sprintf("    must_have_one_noun+=(%q)\n", value))
+	}
+}
+
+func writeArgAliases(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    noun_aliases=()\n")
+	sort.Sort(sort.StringSlice(cmd.ArgAliases))
+	for _, value := range cmd.ArgAliases {
+		buf.WriteString(fmt.Sprintf("    noun_aliases+=(%q)\n", value))
+	}
+}
+
+func gen(buf *bytes.Buffer, cmd *Command) {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c == cmd.helpCommand {
+			continue
+		}
+		gen(buf, c)
+	}
+	commandName := cmd.CommandPath()
+	commandName = strings.Replace(commandName, " ", "_", -1)
+	commandName = strings.Replace(commandName, ":", "__", -1)
+
+	if cmd.Root() == cmd {
+		buf.WriteString(fmt.Sprintf("_%s_root_command()\n{\n", commandName))
+	} else {
+		buf.WriteString(fmt.Sprintf("_%s()\n{\n", commandName))
+	}
+
+	buf.WriteString(fmt.Sprintf("    last_command=%q\n", commandName))
+	writeCommands(buf, cmd)
+	writeFlags(buf, cmd)
+	writeRequiredFlag(buf, cmd)
+	writeRequiredNouns(buf, cmd)
+	writeArgAliases(buf, cmd)
+	buf.WriteString("}\n\n")
+}
+
+// GenBashCompletion generates bash completion file and writes to the passed writer.
+func (c *Command) GenBashCompletion(w io.Writer) error {
+	buf := new(bytes.Buffer)
+	writePreamble(buf, c.Name())
+	if len(c.BashCompletionFunction) > 0 {
+		buf.WriteString(c.BashCompletionFunction + "\n")
+	}
+	gen(buf, c)
+	writePostscript(buf, c.Name())
+
+	_, err := buf.WriteTo(w)
+	return err
+}
+
+func nonCompletableFlag(flag *pflag.Flag) bool {
+	return flag.Hidden || len(flag.Deprecated) > 0
+}
+
+// GenBashCompletionFile generates bash completion file.
+func (c *Command) GenBashCompletionFile(filename string) error {
+	outFile, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer outFile.Close()
+
+	return c.GenBashCompletion(outFile)
+}
+
+// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func (c *Command) MarkFlagRequired(name string) error {
+	return MarkFlagRequired(c.Flags(), name)
+}
+
+// MarkPersistentFlagRequired adds the BashCompOneRequiredFlag annotation to the named persistent flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func (c *Command) MarkPersistentFlagRequired(name string) error {
+	return MarkFlagRequired(c.PersistentFlags(), name)
+}
+
+// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func MarkFlagRequired(flags *pflag.FlagSet, name string) error {
+	return flags.SetAnnotation(name, BashCompOneRequiredFlag, []string{"true"})
+}
+
+// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func (c *Command) MarkFlagFilename(name string, extensions ...string) error {
+	return MarkFlagFilename(c.Flags(), name, extensions...)
+}
+
+// MarkFlagCustom adds the BashCompCustom annotation to the named flag, if it exists.
+// Generated bash autocompletion will call the bash function f for the flag.
+func (c *Command) MarkFlagCustom(name string, f string) error {
+	return MarkFlagCustom(c.Flags(), name, f)
+}
+
+// MarkPersistentFlagFilename adds the BashCompFilenameExt annotation to the named persistent flag, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func (c *Command) MarkPersistentFlagFilename(name string, extensions ...string) error {
+	return MarkFlagFilename(c.PersistentFlags(), name, extensions...)
+}
+
+// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag in the flag set, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func MarkFlagFilename(flags *pflag.FlagSet, name string, extensions ...string) error {
+	return flags.SetAnnotation(name, BashCompFilenameExt, extensions)
+}
+
+// MarkFlagCustom adds the BashCompCustom annotation to the named flag in the flag set, if it exists.
+// Generated bash autocompletion will call the bash function f for the flag.
+func MarkFlagCustom(flags *pflag.FlagSet, name string, f string) error {
+	return flags.SetAnnotation(name, BashCompCustom, []string{f})
+}

vendor/github.com/spf13/cobra/bash_completions.md

@@ -0,0 +1,221 @@
+# Generating Bash Completions For Your Own cobra.Command
+
+Generating bash completions from a cobra command is incredibly easy. An actual program which does so for the kubernetes kubectl binary is as follows:
+
+```go
+package main
+
+import (
+	"io/ioutil"
+	"os"
+
+	"k8s.io/kubernetes/pkg/kubectl/cmd"
+	"k8s.io/kubernetes/pkg/kubectl/cmd/util"
+)
+
+func main() {
+	kubectl := cmd.NewKubectlCommand(util.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
+	kubectl.GenBashCompletionFile("out.sh")
+}
+```
+
+`out.sh` will get you completions of subcommands and flags. Copy it to `/etc/bash_completion.d/` as described [here](https://debian-administration.org/article/316/An_introduction_to_bash_completion_part_1) and reset your terminal to use autocompletion. If you make additional annotations to your code, you can get even more intelligent and flexible behavior.
+
+## Creating your own custom functions
+
+Some more actual code that works in kubernetes:
+
+```bash
+const (
+        bash_completion_func = `__kubectl_parse_get()
+{
+    local kubectl_output out
+    if kubectl_output=$(kubectl get --no-headers "$1" 2>/dev/null); then
+        out=($(echo "${kubectl_output}" | awk '{print $1}'))
+        COMPREPLY=( $( compgen -W "${out[*]}" -- "$cur" ) )
+    fi
+}
+
+__kubectl_get_resource()
+{
+    if [[ ${#nouns[@]} -eq 0 ]]; then
+        return 1
+    fi
+    __kubectl_parse_get ${nouns[${#nouns[@]} -1]}
+    if [[ $? -eq 0 ]]; then
+        return 0
+    fi
+}
+
+__custom_func() {
+    case ${last_command} in
+        kubectl_get | kubectl_describe | kubectl_delete | kubectl_stop)
+            __kubectl_get_resource
+            return
+            ;;
+        *)
+            ;;
+    esac
+}
+`)
+```
+
+And then I set that in my command definition:
+
+```go
+cmds := &cobra.Command{
+	Use:   "kubectl",
+	Short: "kubectl controls the Kubernetes cluster manager",
+	Long: `kubectl controls the Kubernetes cluster manager.
+
+Find more information at https://github.com/GoogleCloudPlatform/kubernetes.`,
+	Run: runHelp,
+	BashCompletionFunction: bash_completion_func,
+}
+```
+
+The `BashCompletionFunction` option is really only valid/useful on the root command. Doing the above will cause `__custom_func()` to be called when the built in processor was unable to find a solution. In the case of kubernetes a valid command might look something like `kubectl get pod [mypod]`. If you type `kubectl get pod [tab][tab]` the `__customc_func()` will run because the cobra.Command only understood "kubectl" and "get." `__custom_func()` will see that the cobra.Command is "kubectl_get" and will thus call another helper `__kubectl_get_resource()`.  `__kubectl_get_resource` will look at the 'nouns' collected. In our example the only noun will be `pod`.  So it will call `__kubectl_parse_get pod`.  `__kubectl_parse_get` will actually call out to kubernetes and get any pods.  It will then set `COMPREPLY` to valid pods!
+
+## Have the completions code complete your 'nouns'
+
+In the above example "pod" was assumed to already be typed. But if you want `kubectl get [tab][tab]` to show a list of valid "nouns" you have to set them. Simplified code from `kubectl get` looks like:
+
+```go
+validArgs []string = { "pod", "node", "service", "replicationcontroller" }
+
+cmd := &cobra.Command{
+	Use:     "get [(-o|--output=)json|yaml|template|...] (RESOURCE [NAME] | RESOURCE/NAME ...)",
+	Short:   "Display one or many resources",
+	Long:    get_long,
+	Example: get_example,
+	Run: func(cmd *cobra.Command, args []string) {
+		err := RunGet(f, out, cmd, args)
+		util.CheckErr(err)
+	},
+	ValidArgs: validArgs,
+}
+```
+
+Notice we put the "ValidArgs" on the "get" subcommand. Doing so will give results like
+
+```bash
+# kubectl get [tab][tab]
+node                 pod                    replicationcontroller  service
+```
+
+## Plural form and shortcuts for nouns
+
+If your nouns have a number of aliases, you can define them alongside `ValidArgs` using `ArgAliases`:
+
+```go
+argAliases []string = { "pods", "nodes", "services", "svc", "replicationcontrollers", "rc" }
+
+cmd := &cobra.Command{
+    ...
+	ValidArgs:  validArgs,
+	ArgAliases: argAliases
+}
+```
+
+The aliases are not shown to the user on tab completion, but they are accepted as valid nouns by
+the completion algorithm if entered manually, e.g. in:
+
+```bash
+# kubectl get rc [tab][tab]
+backend        frontend       database 
+```
+
+Note that without declaring `rc` as an alias, the completion algorithm would show the list of nouns
+in this example again instead of the replication controllers.
+
+## Mark flags as required
+
+Most of the time completions will only show subcommands. But if a flag is required to make a subcommand work, you probably want it to show up when the user types [tab][tab].  Marking a flag as 'Required' is incredibly easy.
+
+```go
+cmd.MarkFlagRequired("pod")
+cmd.MarkFlagRequired("container")
+```
+
+and you'll get something like
+
+```bash
+# kubectl exec [tab][tab][tab]
+-c            --container=  -p            --pod=  
+```
+
+# Specify valid filename extensions for flags that take a filename
+
+In this example we use --filename= and expect to get a json or yaml file as the argument. To make this easier we annotate the --filename flag with valid filename extensions.
+
+```go
+	annotations := []string{"json", "yaml", "yml"}
+	annotation := make(map[string][]string)
+	annotation[cobra.BashCompFilenameExt] = annotations
+
+	flag := &pflag.Flag{
+		Name:        "filename",
+		Shorthand:   "f",
+		Usage:       usage,
+		Value:       value,
+		DefValue:    value.String(),
+		Annotations: annotation,
+	}
+	cmd.Flags().AddFlag(flag)
+```
+
+Now when you run a command with this filename flag you'll get something like
+
+```bash
+# kubectl create -f 
+test/                         example/                      rpmbuild/
+hello.yml                     test.json
+```
+
+So while there are many other files in the CWD it only shows me subdirs and those with valid extensions.
+
+# Specify custom flag completion
+
+Similar to the filename completion and filtering using cobra.BashCompFilenameExt, you can specify
+a custom flag completion function with cobra.BashCompCustom:
+
+```go
+	annotation := make(map[string][]string)
+	annotation[cobra.BashCompFilenameExt] = []string{"__kubectl_get_namespaces"}
+
+	flag := &pflag.Flag{
+		Name:        "namespace",
+		Usage:       usage,
+		Annotations: annotation,
+	}
+	cmd.Flags().AddFlag(flag)
+```
+
+In addition add the `__handle_namespace_flag` implementation in the `BashCompletionFunction`
+value, e.g.:
+
+```bash
+__kubectl_get_namespaces()
+{
+    local template
+    template="{{ range .items  }}{{ .metadata.name }} {{ end }}"
+    local kubectl_out
+    if kubectl_out=$(kubectl get -o template --template="${template}" namespace 2>/dev/null); then
+        COMPREPLY=( $( compgen -W "${kubectl_out}[*]" -- "$cur" ) )
+    fi
+}
+```
+# Using bash aliases for commands
+
+You can also configure the `bash aliases` for the commands and they will also support completions.
+
+```bash
+alias aliasname=origcommand
+complete -o default -F __start_origcommand aliasname
+
+# and now when you run `aliasname` completion will make
+# suggestions as it did for `origcommand`.
+
+$) aliasname <tab><tab>
+completion     firstcommand   secondcommand
+```

vendor/github.com/spf13/cobra/bash_completions_test.go

@@ -0,0 +1,217 @@
+package cobra
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"os/exec"
+	"regexp"
+	"strings"
+	"testing"
+)
+
+func checkOmit(t *testing.T, found, unexpected string) {
+	if strings.Contains(found, unexpected) {
+		t.Errorf("Got: %q\nBut should not have!\n", unexpected)
+	}
+}
+
+func check(t *testing.T, found, expected string) {
+	if !strings.Contains(found, expected) {
+		t.Errorf("Expecting to contain: \n %q\nGot:\n %q\n", expected, found)
+	}
+}
+
+func checkRegex(t *testing.T, found, pattern string) {
+	matched, err := regexp.MatchString(pattern, found)
+	if err != nil {
+		t.Errorf("Error thrown performing MatchString: \n %s\n", err)
+	}
+	if !matched {
+		t.Errorf("Expecting to match: \n %q\nGot:\n %q\n", pattern, found)
+	}
+}
+
+func runShellCheck(s string) error {
+	excluded := []string{
+		"SC2034", // PREFIX appears unused. Verify it or export it.
+	}
+	cmd := exec.Command("shellcheck", "-s", "bash", "-", "-e", strings.Join(excluded, ","))
+	cmd.Stderr = os.Stderr
+	cmd.Stdout = os.Stdout
+
+	stdin, err := cmd.StdinPipe()
+	if err != nil {
+		return err
+	}
+	go func() {
+		stdin.Write([]byte(s))
+		stdin.Close()
+	}()
+
+	return cmd.Run()
+}
+
+// World worst custom function, just keep telling you to enter hello!
+const bashCompletionFunc = `__custom_func() {
+	COMPREPLY=( "hello" )
+}
+`
+
+func TestBashCompletions(t *testing.T) {
+	rootCmd := &Command{
+		Use:                    "root",
+		ArgAliases:             []string{"pods", "nodes", "services", "replicationcontrollers", "po", "no", "svc", "rc"},
+		ValidArgs:              []string{"pod", "node", "service", "replicationcontroller"},
+		BashCompletionFunction: bashCompletionFunc,
+		Run: emptyRun,
+	}
+	rootCmd.Flags().IntP("introot", "i", -1, "help message for flag introot")
+	rootCmd.MarkFlagRequired("introot")
+
+	// Filename.
+	rootCmd.Flags().String("filename", "", "Enter a filename")
+	rootCmd.MarkFlagFilename("filename", "json", "yaml", "yml")
+
+	// Persistent filename.
+	rootCmd.PersistentFlags().String("persistent-filename", "", "Enter a filename")
+	rootCmd.MarkPersistentFlagFilename("persistent-filename")
+	rootCmd.MarkPersistentFlagRequired("persistent-filename")
+
+	// Filename extensions.
+	rootCmd.Flags().String("filename-ext", "", "Enter a filename (extension limited)")
+	rootCmd.MarkFlagFilename("filename-ext")
+	rootCmd.Flags().String("custom", "", "Enter a filename (extension limited)")
+	rootCmd.MarkFlagCustom("custom", "__complete_custom")
+
+	// Subdirectories in a given directory.
+	rootCmd.Flags().String("theme", "", "theme to use (located in /themes/THEMENAME/)")
+	rootCmd.Flags().SetAnnotation("theme", BashCompSubdirsInDir, []string{"themes"})
+
+	echoCmd := &Command{
+		Use:     "echo [string to echo]",
+		Aliases: []string{"say"},
+		Short:   "Echo anything to the screen",
+		Long:    "an utterly useless command for testing.",
+		Example: "Just run cobra-test echo",
+		Run:     emptyRun,
+	}
+
+	echoCmd.Flags().String("filename", "", "Enter a filename")
+	echoCmd.MarkFlagFilename("filename", "json", "yaml", "yml")
+	echoCmd.Flags().String("config", "", "config to use (located in /config/PROFILE/)")
+	echoCmd.Flags().SetAnnotation("config", BashCompSubdirsInDir, []string{"config"})
+
+	printCmd := &Command{
+		Use:   "print [string to print]",
+		Args:  MinimumNArgs(1),
+		Short: "Print anything to the screen",
+		Long:  "an absolutely utterly useless command for testing.",
+		Run:   emptyRun,
+	}
+
+	deprecatedCmd := &Command{
+		Use:        "deprecated [can't do anything here]",
+		Args:       NoArgs,
+		Short:      "A command which is deprecated",
+		Long:       "an absolutely utterly useless command for testing deprecation!.",
+		Deprecated: "Please use echo instead",
+		Run:        emptyRun,
+	}
+
+	colonCmd := &Command{
+		Use: "cmd:colon",
+		Run: emptyRun,
+	}
+
+	timesCmd := &Command{
+		Use:        "times [# times] [string to echo]",
+		SuggestFor: []string{"counts"},
+		Args:       OnlyValidArgs,
+		ValidArgs:  []string{"one", "two", "three", "four"},
+		Short:      "Echo anything to the screen more times",
+		Long:       "a slightly useless command for testing.",
+		Run:        emptyRun,
+	}
+
+	echoCmd.AddCommand(timesCmd)
+	rootCmd.AddCommand(echoCmd, printCmd, deprecatedCmd, colonCmd)
+
+	buf := new(bytes.Buffer)
+	rootCmd.GenBashCompletion(buf)
+	output := buf.String()
+
+	check(t, output, "_root")
+	check(t, output, "_root_echo")
+	check(t, output, "_root_echo_times")
+	check(t, output, "_root_print")
+	check(t, output, "_root_cmd__colon")
+
+	// check for required flags
+	check(t, output, `must_have_one_flag+=("--introot=")`)
+	check(t, output, `must_have_one_flag+=("--persistent-filename=")`)
+	// check for custom completion function
+	check(t, output, `COMPREPLY=( "hello" )`)
+	// check for required nouns
+	check(t, output, `must_have_one_noun+=("pod")`)
+	// check for noun aliases
+	check(t, output, `noun_aliases+=("pods")`)
+	check(t, output, `noun_aliases+=("rc")`)
+	checkOmit(t, output, `must_have_one_noun+=("pods")`)
+	// check for filename extension flags
+	check(t, output, `flags_completion+=("_filedir")`)
+	// check for filename extension flags
+	check(t, output, `must_have_one_noun+=("three")`)
+	// check for filename extension flags
+	check(t, output, fmt.Sprintf(`flags_completion+=("__%s_handle_filename_extension_flag json|yaml|yml")`, rootCmd.Name()))
+	// check for filename extension flags in a subcommand
+	checkRegex(t, output, fmt.Sprintf(`_root_echo\(\)\n{[^}]*flags_completion\+=\("__%s_handle_filename_extension_flag json\|yaml\|yml"\)`, rootCmd.Name()))
+	// check for custom flags
+	check(t, output, `flags_completion+=("__complete_custom")`)
+	// check for subdirs_in_dir flags
+	check(t, output, fmt.Sprintf(`flags_completion+=("__%s_handle_subdirs_in_dir_flag themes")`, rootCmd.Name()))
+	// check for subdirs_in_dir flags in a subcommand
+	checkRegex(t, output, fmt.Sprintf(`_root_echo\(\)\n{[^}]*flags_completion\+=\("__%s_handle_subdirs_in_dir_flag config"\)`, rootCmd.Name()))
+
+	checkOmit(t, output, deprecatedCmd.Name())
+
+	// If available, run shellcheck against the script.
+	if err := exec.Command("which", "shellcheck").Run(); err != nil {
+		return
+	}
+	if err := runShellCheck(output); err != nil {
+		t.Fatalf("shellcheck failed: %v", err)
+	}
+}
+
+func TestBashCompletionHiddenFlag(t *testing.T) {
+	c := &Command{Use: "c", Run: emptyRun}
+
+	const flagName = "hiddenFlag"
+	c.Flags().Bool(flagName, false, "")
+	c.Flags().MarkHidden(flagName)
+
+	buf := new(bytes.Buffer)
+	c.GenBashCompletion(buf)
+	output := buf.String()
+
+	if strings.Contains(output, flagName) {
+		t.Errorf("Expected completion to not include %q flag: Got %v", flagName, output)
+	}
+}
+
+func TestBashCompletionDeprecatedFlag(t *testing.T) {
+	c := &Command{Use: "c", Run: emptyRun}
+
+	const flagName = "deprecated-flag"
+	c.Flags().Bool(flagName, false, "")
+	c.Flags().MarkDeprecated(flagName, "use --not-deprecated instead")
+
+	buf := new(bytes.Buffer)
+	c.GenBashCompletion(buf)
+	output := buf.String()
+
+	if strings.Contains(output, flagName) {
+		t.Errorf("expected completion to not include %q flag: Got %v", flagName, output)
+	}
+}

vendor/github.com/spf13/cobra/cobra.go

@@ -0,0 +1,200 @@
+// Copyright © 2013 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Commands similar to git, go tools and other modern CLI tools
+// inspired by go, go-Commander, gh and subcommand
+
+package cobra
+
+import (
+	"fmt"
+	"io"
+	"reflect"
+	"strconv"
+	"strings"
+	"text/template"
+	"unicode"
+)
+
+var templateFuncs = template.FuncMap{
+	"trim":                    strings.TrimSpace,
+	"trimRightSpace":          trimRightSpace,
+	"trimTrailingWhitespaces": trimRightSpace,
+	"appendIfNotPresent":      appendIfNotPresent,
+	"rpad":                    rpad,
+	"gt":                      Gt,
+	"eq":                      Eq,
+}
+
+var initializers []func()
+
+// EnablePrefixMatching allows to set automatic prefix matching. Automatic prefix matching can be a dangerous thing
+// to automatically enable in CLI tools.
+// Set this to true to enable it.
+var EnablePrefixMatching = false
+
+// EnableCommandSorting controls sorting of the slice of commands, which is turned on by default.
+// To disable sorting, set it to false.
+var EnableCommandSorting = true
+
+// MousetrapHelpText enables an information splash screen on Windows
+// if the CLI is started from explorer.exe.
+// To disable the mousetrap, just set this variable to blank string ("").
+// Works only on Microsoft Windows.
+var MousetrapHelpText string = `This is a command line tool.
+
+You need to open cmd.exe and run it from there.
+`
+
+// AddTemplateFunc adds a template function that's available to Usage and Help
+// template generation.
+func AddTemplateFunc(name string, tmplFunc interface{}) {
+	templateFuncs[name] = tmplFunc
+}
+
+// AddTemplateFuncs adds multiple template functions that are available to Usage and
+// Help template generation.
+func AddTemplateFuncs(tmplFuncs template.FuncMap) {
+	for k, v := range tmplFuncs {
+		templateFuncs[k] = v
+	}
+}
+
+// OnInitialize sets the passed functions to be run when each command's
+// Execute method is called.
+func OnInitialize(y ...func()) {
+	initializers = append(initializers, y...)
+}
+
+// FIXME Gt is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
+
+// Gt takes two types and checks whether the first type is greater than the second. In case of types Arrays, Chans,
+// Maps and Slices, Gt will compare their lengths. Ints are compared directly while strings are first parsed as
+// ints and then compared.
+func Gt(a interface{}, b interface{}) bool {
+	var left, right int64
+	av := reflect.ValueOf(a)
+
+	switch av.Kind() {
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		left = int64(av.Len())
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		left = av.Int()
+	case reflect.String:
+		left, _ = strconv.ParseInt(av.String(), 10, 64)
+	}
+
+	bv := reflect.ValueOf(b)
+
+	switch bv.Kind() {
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		right = int64(bv.Len())
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		right = bv.Int()
+	case reflect.String:
+		right, _ = strconv.ParseInt(bv.String(), 10, 64)
+	}
+
+	return left > right
+}
+
+// FIXME Eq is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
+
+// Eq takes two types and checks whether they are equal. Supported types are int and string. Unsupported types will panic.
+func Eq(a interface{}, b interface{}) bool {
+	av := reflect.ValueOf(a)
+	bv := reflect.ValueOf(b)
+
+	switch av.Kind() {
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		panic("Eq called on unsupported type")
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return av.Int() == bv.Int()
+	case reflect.String:
+		return av.String() == bv.String()
+	}
+	return false
+}
+
+func trimRightSpace(s string) string {
+	return strings.TrimRightFunc(s, unicode.IsSpace)
+}
+
+// FIXME appendIfNotPresent is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
+
+// appendIfNotPresent will append stringToAppend to the end of s, but only if it's not yet present in s.
+func appendIfNotPresent(s, stringToAppend string) string {
+	if strings.Contains(s, stringToAppend) {
+		return s
+	}
+	return s + " " + stringToAppend
+}
+
+// rpad adds padding to the right of a string.
+func rpad(s string, padding int) string {
+	template := fmt.Sprintf("%%-%ds", padding)
+	return fmt.Sprintf(template, s)
+}
+
+// tmpl executes the given template text on data, writing the result to w.
+func tmpl(w io.Writer, text string, data interface{}) error {
+	t := template.New("top")
+	t.Funcs(templateFuncs)
+	template.Must(t.Parse(text))
+	return t.Execute(w, data)
+}
+
+// ld compares two strings and returns the levenshtein distance between them.
+func ld(s, t string, ignoreCase bool) int {
+	if ignoreCase {
+		s = strings.ToLower(s)
+		t = strings.ToLower(t)
+	}
+	d := make([][]int, len(s)+1)
+	for i := range d {
+		d[i] = make([]int, len(t)+1)
+	}
+	for i := range d {
+		d[i][0] = i
+	}
+	for j := range d[0] {
+		d[0][j] = j
+	}
+	for j := 1; j <= len(t); j++ {
+		for i := 1; i <= len(s); i++ {
+			if s[i-1] == t[j-1] {
+				d[i][j] = d[i-1][j-1]
+			} else {
+				min := d[i-1][j]
+				if d[i][j-1] < min {
+					min = d[i][j-1]
+				}
+				if d[i-1][j-1] < min {
+					min = d[i-1][j-1]
+				}
+				d[i][j] = min + 1
+			}
+		}
+
+	}
+	return d[len(s)][len(t)]
+}
+
+func stringInSlice(a string, list []string) bool {
+	for _, b := range list {
+		if b == a {
+			return true
+		}
+	}
+	return false
+}

vendor/github.com/spf13/cobra/cobra/README.md

@@ -0,0 +1,94 @@
+# Cobra Generator
+
+Cobra provides its own program that will create your application and add any
+commands you want. It's the easiest way to incorporate Cobra into your application.
+
+In order to use the cobra command, compile it using the following command:
+
+    go get github.com/spf13/cobra/cobra
+
+This will create the cobra executable under your `$GOPATH/bin` directory.
+
+### cobra init
+
+The `cobra init [app]` command will create your initial application code
+for you. It is a very powerful application that will populate your program with
+the right structure so you can immediately enjoy all the benefits of Cobra. It
+will also automatically apply the license you specify to your application.
+
+Cobra init is pretty smart. You can provide it a full path, or simply a path
+similar to what is expected in the import.
+
+```
+cobra init github.com/spf13/newApp
+```
+
+### cobra add
+
+Once an application is initialized, Cobra can create additional commands for you.
+Let's say you created an app and you wanted the following commands for it:
+
+* app serve
+* app config
+* app config create
+
+In your project directory (where your main.go file is) you would run the following:
+
+```
+cobra add serve
+cobra add config
+cobra add create -p 'configCmd'
+```
+
+*Note: Use camelCase (not snake_case/snake-case) for command names.
+Otherwise, you will encounter errors.
+For example, `cobra add add-user` is incorrect, but `cobra add addUser` is valid.*
+
+Once you have run these three commands you would have an app structure similar to
+the following:
+
+```
+  ▾ app/
+    ▾ cmd/
+        serve.go
+        config.go
+        create.go
+      main.go
+```
+
+At this point you can run `go run main.go` and it would run your app. `go run
+main.go serve`, `go run main.go config`, `go run main.go config create` along
+with `go run main.go help serve`, etc. would all work.
+
+Obviously you haven't added your own code to these yet. The commands are ready
+for you to give them their tasks. Have fun!
+
+### Configuring the cobra generator
+
+The Cobra generator will be easier to use if you provide a simple configuration
+file which will help you eliminate providing a bunch of repeated information in
+flags over and over.
+
+An example ~/.cobra.yaml file:
+
+```yaml
+author: Steve Francia <spf@spf13.com>
+license: MIT
+```
+
+You can specify no license by setting `license` to `none` or you can specify
+a custom license:
+
+```yaml
+license:
+  header: This file is part of {{ .appName }}.
+  text: |
+    {{ .copyright }}
+
+    This is my license. There are many like it, but this one is mine.
+    My license is my best friend. It is my life. I must master it as I must
+    master my life.
+```
+
+You can also use built-in licenses. For example, **GPLv2**, **GPLv3**, **LGPL**,
+**AGPL**, **MIT**, **2-Clause BSD** or **3-Clause BSD**.

vendor/github.com/spf13/cobra/cobra/cmd/add.go

@@ -0,0 +1,179 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"unicode"
+
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	addCmd.Flags().StringVarP(&packageName, "package", "t", "", "target package name (e.g. github.com/spf13/hugo)")
+	addCmd.Flags().StringVarP(&parentName, "parent", "p", "rootCmd", "variable name of parent command for this command")
+}
+
+var packageName, parentName string
+
+var addCmd = &cobra.Command{
+	Use:     "add [command name]",
+	Aliases: []string{"command"},
+	Short:   "Add a command to a Cobra Application",
+	Long: `Add (cobra add) will create a new command, with a license and
+the appropriate structure for a Cobra-based CLI application,
+and register it to its parent (default rootCmd).
+
+If you want your command to be public, pass in the command name
+with an initial uppercase letter.
+
+Example: cobra add server -> resulting in a new cmd/server.go`,
+
+	Run: func(cmd *cobra.Command, args []string) {
+		if len(args) < 1 {
+			er("add needs a name for the command")
+		}
+
+		var project *Project
+		if packageName != "" {
+			project = NewProject(packageName)
+		} else {
+			wd, err := os.Getwd()
+			if err != nil {
+				er(err)
+			}
+			project = NewProjectFromPath(wd)
+		}
+
+		cmdName := validateCmdName(args[0])
+		cmdPath := filepath.Join(project.CmdPath(), cmdName+".go")
+		createCmdFile(project.License(), cmdPath, cmdName)
+
+		fmt.Fprintln(cmd.OutOrStdout(), cmdName, "created at", cmdPath)
+	},
+}
+
+// validateCmdName returns source without any dashes and underscore.
+// If there will be dash or underscore, next letter will be uppered.
+// It supports only ASCII (1-byte character) strings.
+// https://github.com/spf13/cobra/issues/269
+func validateCmdName(source string) string {
+	i := 0
+	l := len(source)
+	// The output is initialized on demand, then first dash or underscore
+	// occurs.
+	var output string
+
+	for i < l {
+		if source[i] == '-' || source[i] == '_' {
+			if output == "" {
+				output = source[:i]
+			}
+
+			// If it's last rune and it's dash or underscore,
+			// don't add it output and break the loop.
+			if i == l-1 {
+				break
+			}
+
+			// If next character is dash or underscore,
+			// just skip the current character.
+			if source[i+1] == '-' || source[i+1] == '_' {
+				i++
+				continue
+			}
+
+			// If the current character is dash or underscore,
+			// upper next letter and add to output.
+			output += string(unicode.ToUpper(rune(source[i+1])))
+			// We know, what source[i] is dash or underscore and source[i+1] is
+			// uppered character, so make i = i+2.
+			i += 2
+			continue
+		}
+
+		// If the current character isn't dash or underscore,
+		// just add it.
+		if output != "" {
+			output += string(source[i])
+		}
+		i++
+	}
+
+	if output == "" {
+		return source // source is initially valid name.
+	}
+	return output
+}
+
+func createCmdFile(license License, path, cmdName string) {
+	template := `{{comment .copyright}}
+{{if .license}}{{comment .license}}{{end}}
+
+package {{.cmdPackage}}
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+// {{.cmdName}}Cmd represents the {{.cmdName}} command
+var {{.cmdName}}Cmd = &cobra.Command{
+	Use:   "{{.cmdName}}",
+	Short: "A brief description of your command",
+	Long: ` + "`" + `A longer description that spans multiple lines and likely contains examples
+and usage of using your command. For example:
+
+Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.` + "`" + `,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("{{.cmdName}} called")
+	},
+}
+
+func init() {
+	{{.parentName}}.AddCommand({{.cmdName}}Cmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// {{.cmdName}}Cmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// {{.cmdName}}Cmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}
+`
+
+	data := make(map[string]interface{})
+	data["copyright"] = copyrightLine()
+	data["license"] = license.Header
+	data["cmdPackage"] = filepath.Base(filepath.Dir(path)) // last dir of path
+	data["parentName"] = parentName
+	data["cmdName"] = cmdName
+
+	cmdScript, err := executeTemplate(template, data)
+	if err != nil {
+		er(err)
+	}
+	err = writeStringToFile(path, cmdScript)
+	if err != nil {
+		er(err)
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/add_test.go

@@ -0,0 +1,109 @@
+package cmd
+
+import (
+	"errors"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/spf13/viper"
+)
+
+// TestGoldenAddCmd initializes the project "github.com/spf13/testproject"
+// in GOPATH, adds "test" command
+// and compares the content of all files in cmd directory of testproject
+// with appropriate golden files.
+// Use -update to update existing golden files.
+func TestGoldenAddCmd(t *testing.T) {
+	projectName := "github.com/spf13/testproject"
+	project := NewProject(projectName)
+	defer os.RemoveAll(project.AbsPath())
+
+	viper.Set("author", "NAME HERE <EMAIL ADDRESS>")
+	viper.Set("license", "apache")
+	viper.Set("year", 2017)
+	defer viper.Set("author", nil)
+	defer viper.Set("license", nil)
+	defer viper.Set("year", nil)
+
+	// Initialize the project first.
+	initializeProject(project)
+
+	// Then add the "test" command.
+	cmdName := "test"
+	cmdPath := filepath.Join(project.CmdPath(), cmdName+".go")
+	createCmdFile(project.License(), cmdPath, cmdName)
+
+	expectedFiles := []string{".", "root.go", "test.go"}
+	gotFiles := []string{}
+
+	// Check project file hierarchy and compare the content of every single file
+	// with appropriate golden file.
+	err := filepath.Walk(project.CmdPath(), func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		// Make path relative to project.CmdPath().
+		// E.g. path = "/home/user/go/src/github.com/spf13/testproject/cmd/root.go"
+		// then it returns just "root.go".
+		relPath, err := filepath.Rel(project.CmdPath(), path)
+		if err != nil {
+			return err
+		}
+		relPath = filepath.ToSlash(relPath)
+		gotFiles = append(gotFiles, relPath)
+		goldenPath := filepath.Join("testdata", filepath.Base(path)+".golden")
+
+		switch relPath {
+		// Known directories.
+		case ".":
+			return nil
+		// Known files.
+		case "root.go", "test.go":
+			if *update {
+				got, err := ioutil.ReadFile(path)
+				if err != nil {
+					return err
+				}
+				ioutil.WriteFile(goldenPath, got, 0644)
+			}
+			return compareFiles(path, goldenPath)
+		}
+		// Unknown file.
+		return errors.New("unknown file: " + path)
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Check if some files lack.
+	if err := checkLackFiles(expectedFiles, gotFiles); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestValidateCmdName(t *testing.T) {
+	testCases := []struct {
+		input    string
+		expected string
+	}{
+		{"cmdName", "cmdName"},
+		{"cmd_name", "cmdName"},
+		{"cmd-name", "cmdName"},
+		{"cmd______Name", "cmdName"},
+		{"cmd------Name", "cmdName"},
+		{"cmd______name", "cmdName"},
+		{"cmd------name", "cmdName"},
+		{"cmdName-----", "cmdName"},
+		{"cmdname-", "cmdname"},
+	}
+
+	for _, testCase := range testCases {
+		got := validateCmdName(testCase.input)
+		if testCase.expected != got {
+			t.Errorf("Expected %q, got %q", testCase.expected, got)
+		}
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/golden_test.go

@@ -0,0 +1,77 @@
+package cmd
+
+import (
+	"bytes"
+	"errors"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os/exec"
+)
+
+var update = flag.Bool("update", false, "update .golden files")
+
+func init() {
+	// Mute commands.
+	addCmd.SetOutput(new(bytes.Buffer))
+	initCmd.SetOutput(new(bytes.Buffer))
+}
+
+// compareFiles compares the content of files with pathA and pathB.
+// If contents are equal, it returns nil.
+// If not, it returns which files are not equal
+// and diff (if system has diff command) between these files.
+func compareFiles(pathA, pathB string) error {
+	contentA, err := ioutil.ReadFile(pathA)
+	if err != nil {
+		return err
+	}
+	contentB, err := ioutil.ReadFile(pathB)
+	if err != nil {
+		return err
+	}
+	if !bytes.Equal(contentA, contentB) {
+		output := new(bytes.Buffer)
+		output.WriteString(fmt.Sprintf("%q and %q are not equal!\n\n", pathA, pathB))
+
+		diffPath, err := exec.LookPath("diff")
+		if err != nil {
+			// Don't execute diff if it can't be found.
+			return nil
+		}
+		diffCmd := exec.Command(diffPath, "-u", pathA, pathB)
+		diffCmd.Stdout = output
+		diffCmd.Stderr = output
+
+		output.WriteString("$ diff -u " + pathA + " " + pathB + "\n")
+		if err := diffCmd.Run(); err != nil {
+			output.WriteString("\n" + err.Error())
+		}
+		return errors.New(output.String())
+	}
+	return nil
+}
+
+// checkLackFiles checks if all elements of expected are in got.
+func checkLackFiles(expected, got []string) error {
+	lacks := make([]string, 0, len(expected))
+	for _, ev := range expected {
+		if !stringInStringSlice(ev, got) {
+			lacks = append(lacks, ev)
+		}
+	}
+	if len(lacks) > 0 {
+		return fmt.Errorf("Lack %v file(s): %v", len(lacks), lacks)
+	}
+	return nil
+}
+
+// stringInStringSlice checks if s is an element of slice.
+func stringInStringSlice(s string, slice []string) bool {
+	for _, v := range slice {
+		if s == v {
+			return true
+		}
+	}
+	return false
+}

vendor/github.com/spf13/cobra/cobra/cmd/helpers.go

@@ -0,0 +1,168 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"text/template"
+)
+
+var srcPaths []string
+
+func init() {
+	// Initialize srcPaths.
+	envGoPath := os.Getenv("GOPATH")
+	goPaths := filepath.SplitList(envGoPath)
+	if len(goPaths) == 0 {
+		// Adapted from https://github.com/Masterminds/glide/pull/798/files.
+		// As of Go 1.8 the GOPATH is no longer required to be set. Instead there
+		// is a default value. If there is no GOPATH check for the default value.
+		// Note, checking the GOPATH first to avoid invoking the go toolchain if
+		// possible.
+
+		goExecutable := os.Getenv("COBRA_GO_EXECUTABLE")
+		if len(goExecutable) <= 0 {
+			goExecutable = "go"
+		}
+
+		out, err := exec.Command(goExecutable, "env", "GOPATH").Output()
+		if err != nil {
+			er(err)
+		}
+
+		toolchainGoPath := strings.TrimSpace(string(out))
+		goPaths = filepath.SplitList(toolchainGoPath)
+		if len(goPaths) == 0 {
+			er("$GOPATH is not set")
+		}
+	}
+	srcPaths = make([]string, 0, len(goPaths))
+	for _, goPath := range goPaths {
+		srcPaths = append(srcPaths, filepath.Join(goPath, "src"))
+	}
+}
+
+func er(msg interface{}) {
+	fmt.Println("Error:", msg)
+	os.Exit(1)
+}
+
+// isEmpty checks if a given path is empty.
+// Hidden files in path are ignored.
+func isEmpty(path string) bool {
+	fi, err := os.Stat(path)
+	if err != nil {
+		er(err)
+	}
+
+	if !fi.IsDir() {
+		return fi.Size() == 0
+	}
+
+	f, err := os.Open(path)
+	if err != nil {
+		er(err)
+	}
+	defer f.Close()
+
+	names, err := f.Readdirnames(-1)
+	if err != nil && err != io.EOF {
+		er(err)
+	}
+
+	for _, name := range names {
+		if len(name) > 0 && name[0] != '.' {
+			return false
+		}
+	}
+	return true
+}
+
+// exists checks if a file or directory exists.
+func exists(path string) bool {
+	if path == "" {
+		return false
+	}
+	_, err := os.Stat(path)
+	if err == nil {
+		return true
+	}
+	if !os.IsNotExist(err) {
+		er(err)
+	}
+	return false
+}
+
+func executeTemplate(tmplStr string, data interface{}) (string, error) {
+	tmpl, err := template.New("").Funcs(template.FuncMap{"comment": commentifyString}).Parse(tmplStr)
+	if err != nil {
+		return "", err
+	}
+
+	buf := new(bytes.Buffer)
+	err = tmpl.Execute(buf, data)
+	return buf.String(), err
+}
+
+func writeStringToFile(path string, s string) error {
+	return writeToFile(path, strings.NewReader(s))
+}
+
+// writeToFile writes r to file with path only
+// if file/directory on given path doesn't exist.
+func writeToFile(path string, r io.Reader) error {
+	if exists(path) {
+		return fmt.Errorf("%v already exists", path)
+	}
+
+	dir := filepath.Dir(path)
+	if dir != "" {
+		if err := os.MkdirAll(dir, 0777); err != nil {
+			return err
+		}
+	}
+
+	file, err := os.Create(path)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	_, err = io.Copy(file, r)
+	return err
+}
+
+// commentfyString comments every line of in.
+func commentifyString(in string) string {
+	var newlines []string
+	lines := strings.Split(in, "\n")
+	for _, line := range lines {
+		if strings.HasPrefix(line, "//") {
+			newlines = append(newlines, line)
+		} else {
+			if line == "" {
+				newlines = append(newlines, "//")
+			} else {
+				newlines = append(newlines, "// "+line)
+			}
+		}
+	}
+	return strings.Join(newlines, "\n")
+}

vendor/github.com/spf13/cobra/cobra/cmd/init.go

@@ -0,0 +1,234 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"path"
+	"path/filepath"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var initCmd = &cobra.Command{
+	Use:     "init [name]",
+	Aliases: []string{"initialize", "initialise", "create"},
+	Short:   "Initialize a Cobra Application",
+	Long: `Initialize (cobra init) will create a new application, with a license
+and the appropriate structure for a Cobra-based CLI application.
+
+  * If a name is provided, it will be created in the current directory;
+  * If no name is provided, the current directory will be assumed;
+  * If a relative path is provided, it will be created inside $GOPATH
+    (e.g. github.com/spf13/hugo);
+  * If an absolute path is provided, it will be created;
+  * If the directory already exists but is empty, it will be used.
+
+Init will not use an existing directory with contents.`,
+
+	Run: func(cmd *cobra.Command, args []string) {
+		wd, err := os.Getwd()
+		if err != nil {
+			er(err)
+		}
+
+		var project *Project
+		if len(args) == 0 {
+			project = NewProjectFromPath(wd)
+		} else if len(args) == 1 {
+			arg := args[0]
+			if arg[0] == '.' {
+				arg = filepath.Join(wd, arg)
+			}
+			if filepath.IsAbs(arg) {
+				project = NewProjectFromPath(arg)
+			} else {
+				project = NewProject(arg)
+			}
+		} else {
+			er("please provide only one argument")
+		}
+
+		initializeProject(project)
+
+		fmt.Fprintln(cmd.OutOrStdout(), `Your Cobra application is ready at
+`+project.AbsPath()+`
+
+Give it a try by going there and running `+"`go run main.go`."+`
+Add commands to it by running `+"`cobra add [cmdname]`.")
+	},
+}
+
+func initializeProject(project *Project) {
+	if !exists(project.AbsPath()) { // If path doesn't yet exist, create it
+		err := os.MkdirAll(project.AbsPath(), os.ModePerm)
+		if err != nil {
+			er(err)
+		}
+	} else if !isEmpty(project.AbsPath()) { // If path exists and is not empty don't use it
+		er("Cobra will not create a new project in a non empty directory: " + project.AbsPath())
+	}
+
+	// We have a directory and it's empty. Time to initialize it.
+	createLicenseFile(project.License(), project.AbsPath())
+	createMainFile(project)
+	createRootCmdFile(project)
+}
+
+func createLicenseFile(license License, path string) {
+	data := make(map[string]interface{})
+	data["copyright"] = copyrightLine()
+
+	// Generate license template from text and data.
+	text, err := executeTemplate(license.Text, data)
+	if err != nil {
+		er(err)
+	}
+
+	// Write license text to LICENSE file.
+	err = writeStringToFile(filepath.Join(path, "LICENSE"), text)
+	if err != nil {
+		er(err)
+	}
+}
+
+func createMainFile(project *Project) {
+	mainTemplate := `{{ comment .copyright }}
+{{if .license}}{{ comment .license }}{{end}}
+
+package main
+
+import "{{ .importpath }}"
+
+func main() {
+	cmd.Execute()
+}
+`
+	data := make(map[string]interface{})
+	data["copyright"] = copyrightLine()
+	data["license"] = project.License().Header
+	data["importpath"] = path.Join(project.Name(), filepath.Base(project.CmdPath()))
+
+	mainScript, err := executeTemplate(mainTemplate, data)
+	if err != nil {
+		er(err)
+	}
+
+	err = writeStringToFile(filepath.Join(project.AbsPath(), "main.go"), mainScript)
+	if err != nil {
+		er(err)
+	}
+}
+
+func createRootCmdFile(project *Project) {
+	template := `{{comment .copyright}}
+{{if .license}}{{comment .license}}{{end}}
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+{{if .viper}}
+	homedir "github.com/mitchellh/go-homedir"{{end}}
+	"github.com/spf13/cobra"{{if .viper}}
+	"github.com/spf13/viper"{{end}}
+){{if .viper}}
+
+var cfgFile string{{end}}
+
+// rootCmd represents the base command when called without any subcommands
+var rootCmd = &cobra.Command{
+	Use:   "{{.appName}}",
+	Short: "A brief description of your application",
+	Long: ` + "`" + `A longer description that spans multiple lines and likely contains
+examples and usage of using your application. For example:
+
+Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.` + "`" + `,
+	// Uncomment the following line if your bare application
+	// has an action associated with it:
+	//	Run: func(cmd *cobra.Command, args []string) { },
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+func init() { {{- if .viper}}
+	cobra.OnInitialize(initConfig)
+{{end}}
+	// Here you will define your flags and configuration settings.
+	// Cobra supports persistent flags, which, if defined here,
+	// will be global for your application.{{ if .viper }}
+	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.{{ .appName }}.yaml)"){{ else }}
+	// rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.{{ .appName }}.yaml)"){{ end }}
+
+	// Cobra also supports local flags, which will only run
+	// when this action is called directly.
+	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}{{ if .viper }}
+
+// initConfig reads in config file and ENV variables if set.
+func initConfig() {
+	if cfgFile != "" {
+		// Use config file from the flag.
+		viper.SetConfigFile(cfgFile)
+	} else {
+		// Find home directory.
+		home, err := homedir.Dir()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+
+		// Search config in home directory with name ".{{ .appName }}" (without extension).
+		viper.AddConfigPath(home)
+		viper.SetConfigName(".{{ .appName }}")
+	}
+
+	viper.AutomaticEnv() // read in environment variables that match
+
+	// If a config file is found, read it in.
+	if err := viper.ReadInConfig(); err == nil {
+		fmt.Println("Using config file:", viper.ConfigFileUsed())
+	}
+}{{ end }}
+`
+
+	data := make(map[string]interface{})
+	data["copyright"] = copyrightLine()
+	data["viper"] = viper.GetBool("useViper")
+	data["license"] = project.License().Header
+	data["appName"] = path.Base(project.Name())
+
+	rootCmdScript, err := executeTemplate(template, data)
+	if err != nil {
+		er(err)
+	}
+
+	err = writeStringToFile(filepath.Join(project.CmdPath(), "root.go"), rootCmdScript)
+	if err != nil {
+		er(err)
+	}
+
+}

vendor/github.com/spf13/cobra/cobra/cmd/init_test.go

@@ -0,0 +1,83 @@
+package cmd
+
+import (
+	"errors"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/spf13/viper"
+)
+
+// TestGoldenInitCmd initializes the project "github.com/spf13/testproject"
+// in GOPATH and compares the content of files in initialized project with
+// appropriate golden files ("testdata/*.golden").
+// Use -update to update existing golden files.
+func TestGoldenInitCmd(t *testing.T) {
+	projectName := "github.com/spf13/testproject"
+	project := NewProject(projectName)
+	defer os.RemoveAll(project.AbsPath())
+
+	viper.Set("author", "NAME HERE <EMAIL ADDRESS>")
+	viper.Set("license", "apache")
+	viper.Set("year", 2017)
+	defer viper.Set("author", nil)
+	defer viper.Set("license", nil)
+	defer viper.Set("year", nil)
+
+	os.Args = []string{"cobra", "init", projectName}
+	if err := rootCmd.Execute(); err != nil {
+		t.Fatal("Error by execution:", err)
+	}
+
+	expectedFiles := []string{".", "cmd", "LICENSE", "main.go", "cmd/root.go"}
+	gotFiles := []string{}
+
+	// Check project file hierarchy and compare the content of every single file
+	// with appropriate golden file.
+	err := filepath.Walk(project.AbsPath(), func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		// Make path relative to project.AbsPath().
+		// E.g. path = "/home/user/go/src/github.com/spf13/testproject/cmd/root.go"
+		// then it returns just "cmd/root.go".
+		relPath, err := filepath.Rel(project.AbsPath(), path)
+		if err != nil {
+			return err
+		}
+		relPath = filepath.ToSlash(relPath)
+		gotFiles = append(gotFiles, relPath)
+		goldenPath := filepath.Join("testdata", filepath.Base(path)+".golden")
+
+		switch relPath {
+		// Known directories.
+		case ".", "cmd":
+			return nil
+		// Known files.
+		case "LICENSE", "main.go", "cmd/root.go":
+			if *update {
+				got, err := ioutil.ReadFile(path)
+				if err != nil {
+					return err
+				}
+				if err := ioutil.WriteFile(goldenPath, got, 0644); err != nil {
+					t.Fatal("Error while updating file:", err)
+				}
+			}
+			return compareFiles(path, goldenPath)
+		}
+		// Unknown file.
+		return errors.New("unknown file: " + path)
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Check if some files lack.
+	if err := checkLackFiles(expectedFiles, gotFiles); err != nil {
+		t.Fatal(err)
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/license_agpl.go

@@ -0,0 +1,683 @@
+package cmd
+
+func initAgpl() {
+	Licenses["agpl"] = License{
+		Name:            "GNU Affero General Public License",
+		PossibleMatches: []string{"agpl", "affero gpl", "gnu agpl"},
+		Header: `
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.`,
+		Text: `                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+  A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate.  Many developers of free software are heartened and
+encouraged by the resulting cooperation.  However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+  The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community.  It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server.  Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+  An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals.  This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
+this license.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU Affero General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+  The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+  The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work.  This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright.  Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+  Conveying under any other circumstances is permitted solely under
+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+  You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+  5. Conveying Modified Source Versions.
+
+  You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+  6. Conveying Non-Source Forms.
+
+  You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+    a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
+    Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source.  This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+
+    d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge.  You need not require recipients to copy the
+    Corresponding Source along with the object code.  If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source.  Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided
+    you inform other peers where the object code and Corresponding
+    Source of the work are being offered to the general public at no
+    charge under subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+  A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+  "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+  The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+  Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions of
+    it) with contractual assumptions of liability to the recipient, for
+    any liability that these contractual assumptions directly impose on
+    those licensors and authors.
+
+  All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10.  If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term.  If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+  If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+  Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+  8. Termination.
+
+  You may not propagate or modify a covered work except as expressly
+provided under this License.  Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+  However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+  Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+  Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software.  This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<http://www.gnu.org/licenses/>.
+`,
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/license_apache_2.go

@@ -0,0 +1,238 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initApache2() {
+	Licenses["apache"] = License{
+		Name:            "Apache 2.0",
+		PossibleMatches: []string{"apache", "apache20", "apache 2.0", "apache2.0", "apache-2.0"},
+		Header: `
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.`,
+		Text: `
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+`,
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/license_bsd_clause_2.go

@@ -0,0 +1,71 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initBsdClause2() {
+	Licenses["freebsd"] = License{
+		Name: "Simplified BSD License",
+		PossibleMatches: []string{"freebsd", "simpbsd", "simple bsd", "2-clause bsd",
+			"2 clause bsd", "simplified bsd license"},
+		Header: `All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.`,
+		Text: `{{ .copyright }}
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+`,
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/license_bsd_clause_3.go

@@ -0,0 +1,78 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initBsdClause3() {
+	Licenses["bsd"] = License{
+		Name:            "NewBSD",
+		PossibleMatches: []string{"bsd", "newbsd", "3 clause bsd", "3-clause bsd"},
+		Header: `All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.`,
+		Text: `{{ .copyright }}
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+`,
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/license_gpl_2.go

@@ -0,0 +1,376 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initGpl2() {
+	Licenses["gpl2"] = License{
+		Name:            "GNU General Public License 2.0",
+		PossibleMatches: []string{"gpl2", "gnu gpl2", "gplv2"},
+		Header: `
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.`,
+		Text: `                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type 'show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type 'show c' for details.
+
+The hypothetical commands 'show w' and 'show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than 'show w' and 'show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  'Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
+`,
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/license_gpl_3.go

@@ -0,0 +1,711 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initGpl3() {
+	Licenses["gpl3"] = License{
+		Name:            "GNU General Public License 3.0",
+		PossibleMatches: []string{"gpl3", "gplv3", "gpl", "gnu gpl3", "gnu gpl"},
+		Header: `
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.`,
+		Text: `                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
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+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type 'show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type 'show c' for details.
+
+The hypothetical commands 'show w' and 'show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+`,
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/license_lgpl.go

@@ -0,0 +1,186 @@
+package cmd
+
+func initLgpl() {
+	Licenses["lgpl"] = License{
+		Name:            "GNU Lesser General Public License",
+		PossibleMatches: []string{"lgpl", "lesser gpl", "gnu lgpl"},
+		Header: `
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.`,
+		Text: `                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.`,
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/license_mit.go

@@ -0,0 +1,63 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initMit() {
+	Licenses["mit"] = License{
+		Name:            "MIT License",
+		PossibleMatches: []string{"mit"},
+		Header: `
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.`,
+		Text: `The MIT License (MIT)
+
+{{ .copyright }}
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+`,
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/licenses.go

@@ -0,0 +1,118 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+import (
+	"strings"
+	"time"
+
+	"github.com/spf13/viper"
+)
+
+// Licenses contains all possible licenses a user can choose from.
+var Licenses = make(map[string]License)
+
+// License represents a software license agreement, containing the Name of
+// the license, its possible matches (on the command line as given to cobra),
+// the header to be used with each file on the file's creating, and the text
+// of the license
+type License struct {
+	Name            string   // The type of license in use
+	PossibleMatches []string // Similar names to guess
+	Text            string   // License text data
+	Header          string   // License header for source files
+}
+
+func init() {
+	// Allows a user to not use a license.
+	Licenses["none"] = License{"None", []string{"none", "false"}, "", ""}
+
+	initApache2()
+	initMit()
+	initBsdClause3()
+	initBsdClause2()
+	initGpl2()
+	initGpl3()
+	initLgpl()
+	initAgpl()
+}
+
+// getLicense returns license specified by user in flag or in config.
+// If user didn't specify the license, it returns Apache License 2.0.
+//
+// TODO: Inspect project for existing license
+func getLicense() License {
+	// If explicitly flagged, use that.
+	if userLicense != "" {
+		return findLicense(userLicense)
+	}
+
+	// If user wants to have custom license, use that.
+	if viper.IsSet("license.header") || viper.IsSet("license.text") {
+		return License{Header: viper.GetString("license.header"),
+			Text: viper.GetString("license.text")}
+	}
+
+	// If user wants to have built-in license, use that.
+	if viper.IsSet("license") {
+		return findLicense(viper.GetString("license"))
+	}
+
+	// If user didn't set any license, use Apache 2.0 by default.
+	return Licenses["apache"]
+}
+
+func copyrightLine() string {
+	author := viper.GetString("author")
+
+	year := viper.GetString("year") // For tests.
+	if year == "" {
+		year = time.Now().Format("2006")
+	}
+
+	return "Copyright © " + year + " " + author
+}
+
+// findLicense looks for License object of built-in licenses.
+// If it didn't find license, then the app will be terminated and
+// error will be printed.
+func findLicense(name string) License {
+	found := matchLicense(name)
+	if found == "" {
+		er("unknown license: " + name)
+	}
+	return Licenses[found]
+}
+
+// matchLicense compares the given a license name
+// to PossibleMatches of all built-in licenses.
+// It returns blank string, if name is blank string or it didn't find
+// then appropriate match to name.
+func matchLicense(name string) string {
+	if name == "" {
+		return ""
+	}
+
+	for key, lic := range Licenses {
+		for _, match := range lic.PossibleMatches {
+			if strings.EqualFold(name, match) {
+				return key
+			}
+		}
+	}
+
+	return ""
+}

vendor/github.com/spf13/cobra/cobra/cmd/project.go

@@ -0,0 +1,200 @@
+package cmd
+
+import (
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+)
+
+// Project contains name, license and paths to projects.
+type Project struct {
+	absPath string
+	cmdPath string
+	srcPath string
+	license License
+	name    string
+}
+
+// NewProject returns Project with specified project name.
+func NewProject(projectName string) *Project {
+	if projectName == "" {
+		er("can't create project with blank name")
+	}
+
+	p := new(Project)
+	p.name = projectName
+
+	// 1. Find already created protect.
+	p.absPath = findPackage(projectName)
+
+	// 2. If there are no created project with this path, and user is in GOPATH,
+	// then use GOPATH/src/projectName.
+	if p.absPath == "" {
+		wd, err := os.Getwd()
+		if err != nil {
+			er(err)
+		}
+		for _, srcPath := range srcPaths {
+			goPath := filepath.Dir(srcPath)
+			if filepathHasPrefix(wd, goPath) {
+				p.absPath = filepath.Join(srcPath, projectName)
+				break
+			}
+		}
+	}
+
+	// 3. If user is not in GOPATH, then use (first GOPATH)/src/projectName.
+	if p.absPath == "" {
+		p.absPath = filepath.Join(srcPaths[0], projectName)
+	}
+
+	return p
+}
+
+// findPackage returns full path to existing go package in GOPATHs.
+func findPackage(packageName string) string {
+	if packageName == "" {
+		return ""
+	}
+
+	for _, srcPath := range srcPaths {
+		packagePath := filepath.Join(srcPath, packageName)
+		if exists(packagePath) {
+			return packagePath
+		}
+	}
+
+	return ""
+}
+
+// NewProjectFromPath returns Project with specified absolute path to
+// package.
+func NewProjectFromPath(absPath string) *Project {
+	if absPath == "" {
+		er("can't create project: absPath can't be blank")
+	}
+	if !filepath.IsAbs(absPath) {
+		er("can't create project: absPath is not absolute")
+	}
+
+	// If absPath is symlink, use its destination.
+	fi, err := os.Lstat(absPath)
+	if err != nil {
+		er("can't read path info: " + err.Error())
+	}
+	if fi.Mode()&os.ModeSymlink != 0 {
+		path, err := os.Readlink(absPath)
+		if err != nil {
+			er("can't read the destination of symlink: " + err.Error())
+		}
+		absPath = path
+	}
+
+	p := new(Project)
+	p.absPath = strings.TrimSuffix(absPath, findCmdDir(absPath))
+	p.name = filepath.ToSlash(trimSrcPath(p.absPath, p.SrcPath()))
+	return p
+}
+
+// trimSrcPath trims at the beginning of absPath the srcPath.
+func trimSrcPath(absPath, srcPath string) string {
+	relPath, err := filepath.Rel(srcPath, absPath)
+	if err != nil {
+		er(err)
+	}
+	return relPath
+}
+
+// License returns the License object of project.
+func (p *Project) License() License {
+	if p.license.Text == "" && p.license.Name != "None" {
+		p.license = getLicense()
+	}
+	return p.license
+}
+
+// Name returns the name of project, e.g. "github.com/spf13/cobra"
+func (p Project) Name() string {
+	return p.name
+}
+
+// CmdPath returns absolute path to directory, where all commands are located.
+func (p *Project) CmdPath() string {
+	if p.absPath == "" {
+		return ""
+	}
+	if p.cmdPath == "" {
+		p.cmdPath = filepath.Join(p.absPath, findCmdDir(p.absPath))
+	}
+	return p.cmdPath
+}
+
+// findCmdDir checks if base of absPath is cmd dir and returns it or
+// looks for existing cmd dir in absPath.
+func findCmdDir(absPath string) string {
+	if !exists(absPath) || isEmpty(absPath) {
+		return "cmd"
+	}
+
+	if isCmdDir(absPath) {
+		return filepath.Base(absPath)
+	}
+
+	files, _ := filepath.Glob(filepath.Join(absPath, "c*"))
+	for _, file := range files {
+		if isCmdDir(file) {
+			return filepath.Base(file)
+		}
+	}
+
+	return "cmd"
+}
+
+// isCmdDir checks if base of name is one of cmdDir.
+func isCmdDir(name string) bool {
+	name = filepath.Base(name)
+	for _, cmdDir := range []string{"cmd", "cmds", "command", "commands"} {
+		if name == cmdDir {
+			return true
+		}
+	}
+	return false
+}
+
+// AbsPath returns absolute path of project.
+func (p Project) AbsPath() string {
+	return p.absPath
+}
+
+// SrcPath returns absolute path to $GOPATH/src where project is located.
+func (p *Project) SrcPath() string {
+	if p.srcPath != "" {
+		return p.srcPath
+	}
+	if p.absPath == "" {
+		p.srcPath = srcPaths[0]
+		return p.srcPath
+	}
+
+	for _, srcPath := range srcPaths {
+		if filepathHasPrefix(p.absPath, srcPath) {
+			p.srcPath = srcPath
+			break
+		}
+	}
+
+	return p.srcPath
+}
+
+func filepathHasPrefix(path string, prefix string) bool {
+	if len(path) <= len(prefix) {
+		return false
+	}
+	if runtime.GOOS == "windows" {
+		// Paths in windows are case-insensitive.
+		return strings.EqualFold(path[0:len(prefix)], prefix)
+	}
+	return path[0:len(prefix)] == prefix
+
+}

vendor/github.com/spf13/cobra/cobra/cmd/project_test.go

@@ -0,0 +1,24 @@
+package cmd
+
+import (
+	"testing"
+)
+
+func TestFindExistingPackage(t *testing.T) {
+	path := findPackage("github.com/spf13/cobra")
+	if path == "" {
+		t.Fatal("findPackage didn't find the existing package")
+	}
+	if !hasGoPathPrefix(path) {
+		t.Fatalf("%q is not in GOPATH, but must be", path)
+	}
+}
+
+func hasGoPathPrefix(path string) bool {
+	for _, srcPath := range srcPaths {
+		if filepathHasPrefix(path, srcPath) {
+			return true
+		}
+	}
+	return false
+}

vendor/github.com/spf13/cobra/cobra/cmd/root.go

@@ -0,0 +1,79 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"fmt"
+
+	homedir "github.com/mitchellh/go-homedir"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var (
+	// Used for flags.
+	cfgFile, userLicense string
+
+	rootCmd = &cobra.Command{
+		Use:   "cobra",
+		Short: "A generator for Cobra based Applications",
+		Long: `Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.`,
+	}
+)
+
+// Execute executes the root command.
+func Execute() {
+	rootCmd.Execute()
+}
+
+func init() {
+	cobra.OnInitialize(initConfig)
+
+	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cobra.yaml)")
+	rootCmd.PersistentFlags().StringP("author", "a", "YOUR NAME", "author name for copyright attribution")
+	rootCmd.PersistentFlags().StringVarP(&userLicense, "license", "l", "", "name of license for the project")
+	rootCmd.PersistentFlags().Bool("viper", true, "use Viper for configuration")
+	viper.BindPFlag("author", rootCmd.PersistentFlags().Lookup("author"))
+	viper.BindPFlag("useViper", rootCmd.PersistentFlags().Lookup("viper"))
+	viper.SetDefault("author", "NAME HERE <EMAIL ADDRESS>")
+	viper.SetDefault("license", "apache")
+
+	rootCmd.AddCommand(addCmd)
+	rootCmd.AddCommand(initCmd)
+}
+
+func initConfig() {
+	if cfgFile != "" {
+		// Use config file from the flag.
+		viper.SetConfigFile(cfgFile)
+	} else {
+		// Find home directory.
+		home, err := homedir.Dir()
+		if err != nil {
+			er(err)
+		}
+
+		// Search config in home directory with name ".cobra" (without extension).
+		viper.AddConfigPath(home)
+		viper.SetConfigName(".cobra")
+	}
+
+	viper.AutomaticEnv()
+
+	if err := viper.ReadInConfig(); err == nil {
+		fmt.Println("Using config file:", viper.ConfigFileUsed())
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/testdata/LICENSE.golden

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
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+      other entities that control, are controlled by, or are under common
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+      direction or management of such entity, whether by contract or
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      including but not limited to software source code, documentation
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+      Object form, made available under the License, as indicated by a
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
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+          that such additional attribution notices cannot be construed
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
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+      origin of the Work and reproducing the content of the NOTICE file.
+
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+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
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+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/spf13/cobra/cobra/cmd/testdata/main.go.golden

@@ -0,0 +1,21 @@
+// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import "github.com/spf13/testproject/cmd"
+
+func main() {
+	cmd.Execute()
+}

vendor/github.com/spf13/cobra/cobra/cmd/testdata/root.go.golden

@@ -0,0 +1,89 @@
+// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	homedir "github.com/mitchellh/go-homedir"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var cfgFile string
+
+// rootCmd represents the base command when called without any subcommands
+var rootCmd = &cobra.Command{
+	Use:   "testproject",
+	Short: "A brief description of your application",
+	Long: `A longer description that spans multiple lines and likely contains
+examples and usage of using your application. For example:
+
+Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.`,
+	// Uncomment the following line if your bare application
+	// has an action associated with it:
+	//	Run: func(cmd *cobra.Command, args []string) { },
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+func init() {
+	cobra.OnInitialize(initConfig)
+
+	// Here you will define your flags and configuration settings.
+	// Cobra supports persistent flags, which, if defined here,
+	// will be global for your application.
+	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.testproject.yaml)")
+
+	// Cobra also supports local flags, which will only run
+	// when this action is called directly.
+	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}
+
+// initConfig reads in config file and ENV variables if set.
+func initConfig() {
+	if cfgFile != "" {
+		// Use config file from the flag.
+		viper.SetConfigFile(cfgFile)
+	} else {
+		// Find home directory.
+		home, err := homedir.Dir()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+
+		// Search config in home directory with name ".testproject" (without extension).
+		viper.AddConfigPath(home)
+		viper.SetConfigName(".testproject")
+	}
+
+	viper.AutomaticEnv() // read in environment variables that match
+
+	// If a config file is found, read it in.
+	if err := viper.ReadInConfig(); err == nil {
+		fmt.Println("Using config file:", viper.ConfigFileUsed())
+	}
+}

vendor/github.com/spf13/cobra/cobra/cmd/testdata/test.go.golden

@@ -0,0 +1,50 @@
+// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+// testCmd represents the test command
+var testCmd = &cobra.Command{
+	Use:   "test",
+	Short: "A brief description of your command",
+	Long: `A longer description that spans multiple lines and likely contains examples
+and usage of using your command. For example:
+
+Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("test called")
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(testCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// testCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// testCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}

vendor/github.com/spf13/cobra/cobra/main.go

@@ -0,0 +1,20 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import "github.com/spf13/cobra/cobra/cmd"
+
+func main() {
+	cmd.Execute()
+}

vendor/github.com/spf13/cobra/cobra_test.go

@@ -0,0 +1,22 @@
+package cobra
+
+import (
+	"testing"
+	"text/template"
+)
+
+func TestAddTemplateFunctions(t *testing.T) {
+	AddTemplateFunc("t", func() bool { return true })
+	AddTemplateFuncs(template.FuncMap{
+		"f": func() bool { return false },
+		"h": func() string { return "Hello," },
+		"w": func() string { return "world." }})
+
+	c := &Command{}
+	c.SetUsageTemplate(`{{if t}}{{h}}{{end}}{{if f}}{{h}}{{end}} {{w}}`)
+
+	const expected = "Hello, world."
+	if got := c.UsageString(); got != expected {
+		t.Errorf("Expected UsageString: %v\nGot: %v", expected, got)
+	}
+}

vendor/github.com/spf13/cobra/command.go

@@ -0,0 +1,1517 @@
+// Copyright © 2013 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package cobra is a commander providing a simple interface to create powerful modern CLI interfaces.
+// In addition to providing an interface, Cobra simultaneously provides a controller to organize your application code.
+package cobra
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	flag "github.com/spf13/pflag"
+)
+
+// FParseErrWhitelist configures Flag parse errors to be ignored
+type FParseErrWhitelist flag.ParseErrorsWhitelist
+
+// Command is just that, a command for your application.
+// E.g.  'go run ...' - 'run' is the command. Cobra requires
+// you to define the usage and description as part of your command
+// definition to ensure usability.
+type Command struct {
+	// Use is the one-line usage message.
+	Use string
+
+	// Aliases is an array of aliases that can be used instead of the first word in Use.
+	Aliases []string
+
+	// SuggestFor is an array of command names for which this command will be suggested -
+	// similar to aliases but only suggests.
+	SuggestFor []string
+
+	// Short is the short description shown in the 'help' output.
+	Short string
+
+	// Long is the long message shown in the 'help <this-command>' output.
+	Long string
+
+	// Example is examples of how to use the command.
+	Example string
+
+	// ValidArgs is list of all valid non-flag arguments that are accepted in bash completions
+	ValidArgs []string
+
+	// Expected arguments
+	Args PositionalArgs
+
+	// ArgAliases is List of aliases for ValidArgs.
+	// These are not suggested to the user in the bash completion,
+	// but accepted if entered manually.
+	ArgAliases []string
+
+	// BashCompletionFunction is custom functions used by the bash autocompletion generator.
+	BashCompletionFunction string
+
+	// Deprecated defines, if this command is deprecated and should print this string when used.
+	Deprecated string
+
+	// Hidden defines, if this command is hidden and should NOT show up in the list of available commands.
+	Hidden bool
+
+	// Annotations are key/value pairs that can be used by applications to identify or
+	// group commands.
+	Annotations map[string]string
+
+	// Version defines the version for this command. If this value is non-empty and the command does not
+	// define a "version" flag, a "version" boolean flag will be added to the command and, if specified,
+	// will print content of the "Version" variable.
+	Version string
+
+	// The *Run functions are executed in the following order:
+	//   * PersistentPreRun()
+	//   * PreRun()
+	//   * Run()
+	//   * PostRun()
+	//   * PersistentPostRun()
+	// All functions get the same args, the arguments after the command name.
+	//
+	// PersistentPreRun: children of this command will inherit and execute.
+	PersistentPreRun func(cmd *Command, args []string)
+	// PersistentPreRunE: PersistentPreRun but returns an error.
+	PersistentPreRunE func(cmd *Command, args []string) error
+	// PreRun: children of this command will not inherit.
+	PreRun func(cmd *Command, args []string)
+	// PreRunE: PreRun but returns an error.
+	PreRunE func(cmd *Command, args []string) error
+	// Run: Typically the actual work function. Most commands will only implement this.
+	Run func(cmd *Command, args []string)
+	// RunE: Run but returns an error.
+	RunE func(cmd *Command, args []string) error
+	// PostRun: run after the Run command.
+	PostRun func(cmd *Command, args []string)
+	// PostRunE: PostRun but returns an error.
+	PostRunE func(cmd *Command, args []string) error
+	// PersistentPostRun: children of this command will inherit and execute after PostRun.
+	PersistentPostRun func(cmd *Command, args []string)
+	// PersistentPostRunE: PersistentPostRun but returns an error.
+	PersistentPostRunE func(cmd *Command, args []string) error
+
+	// SilenceErrors is an option to quiet errors down stream.
+	SilenceErrors bool
+
+	// SilenceUsage is an option to silence usage when an error occurs.
+	SilenceUsage bool
+
+	// DisableFlagParsing disables the flag parsing.
+	// If this is true all flags will be passed to the command as arguments.
+	DisableFlagParsing bool
+
+	// DisableAutoGenTag defines, if gen tag ("Auto generated by spf13/cobra...")
+	// will be printed by generating docs for this command.
+	DisableAutoGenTag bool
+
+	// DisableFlagsInUseLine will disable the addition of [flags] to the usage
+	// line of a command when printing help or generating docs
+	DisableFlagsInUseLine bool
+
+	// DisableSuggestions disables the suggestions based on Levenshtein distance
+	// that go along with 'unknown command' messages.
+	DisableSuggestions bool
+	// SuggestionsMinimumDistance defines minimum levenshtein distance to display suggestions.
+	// Must be > 0.
+	SuggestionsMinimumDistance int
+
+	// TraverseChildren parses flags on all parents before executing child command.
+	TraverseChildren bool
+
+	//FParseErrWhitelist flag parse errors to be ignored
+	FParseErrWhitelist FParseErrWhitelist
+
+	// commands is the list of commands supported by this program.
+	commands []*Command
+	// parent is a parent command for this command.
+	parent *Command
+	// Max lengths of commands' string lengths for use in padding.
+	commandsMaxUseLen         int
+	commandsMaxCommandPathLen int
+	commandsMaxNameLen        int
+	// commandsAreSorted defines, if command slice are sorted or not.
+	commandsAreSorted bool
+	// commandCalledAs is the name or alias value used to call this command.
+	commandCalledAs struct {
+		name   string
+		called bool
+	}
+
+	// args is actual args parsed from flags.
+	args []string
+	// flagErrorBuf contains all error messages from pflag.
+	flagErrorBuf *bytes.Buffer
+	// flags is full set of flags.
+	flags *flag.FlagSet
+	// pflags contains persistent flags.
+	pflags *flag.FlagSet
+	// lflags contains local flags.
+	lflags *flag.FlagSet
+	// iflags contains inherited flags.
+	iflags *flag.FlagSet
+	// parentsPflags is all persistent flags of cmd's parents.
+	parentsPflags *flag.FlagSet
+	// globNormFunc is the global normalization function
+	// that we can use on every pflag set and children commands
+	globNormFunc func(f *flag.FlagSet, name string) flag.NormalizedName
+
+	// output is an output writer defined by user.
+	output io.Writer
+	// usageFunc is usage func defined by user.
+	usageFunc func(*Command) error
+	// usageTemplate is usage template defined by user.
+	usageTemplate string
+	// flagErrorFunc is func defined by user and it's called when the parsing of
+	// flags returns an error.
+	flagErrorFunc func(*Command, error) error
+	// helpTemplate is help template defined by user.
+	helpTemplate string
+	// helpFunc is help func defined by user.
+	helpFunc func(*Command, []string)
+	// helpCommand is command with usage 'help'. If it's not defined by user,
+	// cobra uses default help command.
+	helpCommand *Command
+	// versionTemplate is the version template defined by user.
+	versionTemplate string
+}
+
+// SetArgs sets arguments for the command. It is set to os.Args[1:] by default, if desired, can be overridden
+// particularly useful when testing.
+func (c *Command) SetArgs(a []string) {
+	c.args = a
+}
+
+// SetOutput sets the destination for usage and error messages.
+// If output is nil, os.Stderr is used.
+func (c *Command) SetOutput(output io.Writer) {
+	c.output = output
+}
+
+// SetUsageFunc sets usage function. Usage can be defined by application.
+func (c *Command) SetUsageFunc(f func(*Command) error) {
+	c.usageFunc = f
+}
+
+// SetUsageTemplate sets usage template. Can be defined by Application.
+func (c *Command) SetUsageTemplate(s string) {
+	c.usageTemplate = s
+}
+
+// SetFlagErrorFunc sets a function to generate an error when flag parsing
+// fails.
+func (c *Command) SetFlagErrorFunc(f func(*Command, error) error) {
+	c.flagErrorFunc = f
+}
+
+// SetHelpFunc sets help function. Can be defined by Application.
+func (c *Command) SetHelpFunc(f func(*Command, []string)) {
+	c.helpFunc = f
+}
+
+// SetHelpCommand sets help command.
+func (c *Command) SetHelpCommand(cmd *Command) {
+	c.helpCommand = cmd
+}
+
+// SetHelpTemplate sets help template to be used. Application can use it to set custom template.
+func (c *Command) SetHelpTemplate(s string) {
+	c.helpTemplate = s
+}
+
+// SetVersionTemplate sets version template to be used. Application can use it to set custom template.
+func (c *Command) SetVersionTemplate(s string) {
+	c.versionTemplate = s
+}
+
+// SetGlobalNormalizationFunc sets a normalization function to all flag sets and also to child commands.
+// The user should not have a cyclic dependency on commands.
+func (c *Command) SetGlobalNormalizationFunc(n func(f *flag.FlagSet, name string) flag.NormalizedName) {
+	c.Flags().SetNormalizeFunc(n)
+	c.PersistentFlags().SetNormalizeFunc(n)
+	c.globNormFunc = n
+
+	for _, command := range c.commands {
+		command.SetGlobalNormalizationFunc(n)
+	}
+}
+
+// OutOrStdout returns output to stdout.
+func (c *Command) OutOrStdout() io.Writer {
+	return c.getOut(os.Stdout)
+}
+
+// OutOrStderr returns output to stderr
+func (c *Command) OutOrStderr() io.Writer {
+	return c.getOut(os.Stderr)
+}
+
+func (c *Command) getOut(def io.Writer) io.Writer {
+	if c.output != nil {
+		return c.output
+	}
+	if c.HasParent() {
+		return c.parent.getOut(def)
+	}
+	return def
+}
+
+// UsageFunc returns either the function set by SetUsageFunc for this command
+// or a parent, or it returns a default usage function.
+func (c *Command) UsageFunc() (f func(*Command) error) {
+	if c.usageFunc != nil {
+		return c.usageFunc
+	}
+	if c.HasParent() {
+		return c.Parent().UsageFunc()
+	}
+	return func(c *Command) error {
+		c.mergePersistentFlags()
+		err := tmpl(c.OutOrStderr(), c.UsageTemplate(), c)
+		if err != nil {
+			c.Println(err)
+		}
+		return err
+	}
+}
+
+// Usage puts out the usage for the command.
+// Used when a user provides invalid input.
+// Can be defined by user by overriding UsageFunc.
+func (c *Command) Usage() error {
+	return c.UsageFunc()(c)
+}
+
+// HelpFunc returns either the function set by SetHelpFunc for this command
+// or a parent, or it returns a function with default help behavior.
+func (c *Command) HelpFunc() func(*Command, []string) {
+	if c.helpFunc != nil {
+		return c.helpFunc
+	}
+	if c.HasParent() {
+		return c.Parent().HelpFunc()
+	}
+	return func(c *Command, a []string) {
+		c.mergePersistentFlags()
+		err := tmpl(c.OutOrStdout(), c.HelpTemplate(), c)
+		if err != nil {
+			c.Println(err)
+		}
+	}
+}
+
+// Help puts out the help for the command.
+// Used when a user calls help [command].
+// Can be defined by user by overriding HelpFunc.
+func (c *Command) Help() error {
+	c.HelpFunc()(c, []string{})
+	return nil
+}
+
+// UsageString return usage string.
+func (c *Command) UsageString() string {
+	tmpOutput := c.output
+	bb := new(bytes.Buffer)
+	c.SetOutput(bb)
+	c.Usage()
+	c.output = tmpOutput
+	return bb.String()
+}
+
+// FlagErrorFunc returns either the function set by SetFlagErrorFunc for this
+// command or a parent, or it returns a function which returns the original
+// error.
+func (c *Command) FlagErrorFunc() (f func(*Command, error) error) {
+	if c.flagErrorFunc != nil {
+		return c.flagErrorFunc
+	}
+
+	if c.HasParent() {
+		return c.parent.FlagErrorFunc()
+	}
+	return func(c *Command, err error) error {
+		return err
+	}
+}
+
+var minUsagePadding = 25
+
+// UsagePadding return padding for the usage.
+func (c *Command) UsagePadding() int {
+	if c.parent == nil || minUsagePadding > c.parent.commandsMaxUseLen {
+		return minUsagePadding
+	}
+	return c.parent.commandsMaxUseLen
+}
+
+var minCommandPathPadding = 11
+
+// CommandPathPadding return padding for the command path.
+func (c *Command) CommandPathPadding() int {
+	if c.parent == nil || minCommandPathPadding > c.parent.commandsMaxCommandPathLen {
+		return minCommandPathPadding
+	}
+	return c.parent.commandsMaxCommandPathLen
+}
+
+var minNamePadding = 11
+
+// NamePadding returns padding for the name.
+func (c *Command) NamePadding() int {
+	if c.parent == nil || minNamePadding > c.parent.commandsMaxNameLen {
+		return minNamePadding
+	}
+	return c.parent.commandsMaxNameLen
+}
+
+// UsageTemplate returns usage template for the command.
+func (c *Command) UsageTemplate() string {
+	if c.usageTemplate != "" {
+		return c.usageTemplate
+	}
+
+	if c.HasParent() {
+		return c.parent.UsageTemplate()
+	}
+	return `Usage:{{if .Runnable}}
+  {{.UseLine}}{{end}}{{if .HasAvailableSubCommands}}
+  {{.CommandPath}} [command]{{end}}{{if gt (len .Aliases) 0}}
+
+Aliases:
+  {{.NameAndAliases}}{{end}}{{if .HasExample}}
+
+Examples:
+{{.Example}}{{end}}{{if .HasAvailableSubCommands}}
+
+Available Commands:{{range .Commands}}{{if (or .IsAvailableCommand (eq .Name "help"))}}
+  {{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableLocalFlags}}
+
+Flags:
+{{.LocalFlags.FlagUsages | trimTrailingWhitespaces}}{{end}}{{if .HasAvailableInheritedFlags}}
+
+Global Flags:
+{{.InheritedFlags.FlagUsages | trimTrailingWhitespaces}}{{end}}{{if .HasHelpSubCommands}}
+
+Additional help topics:{{range .Commands}}{{if .IsAdditionalHelpTopicCommand}}
+  {{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableSubCommands}}
+
+Use "{{.CommandPath}} [command] --help" for more information about a command.{{end}}
+`
+}
+
+// HelpTemplate return help template for the command.
+func (c *Command) HelpTemplate() string {
+	if c.helpTemplate != "" {
+		return c.helpTemplate
+	}
+
+	if c.HasParent() {
+		return c.parent.HelpTemplate()
+	}
+	return `{{with (or .Long .Short)}}{{. | trimTrailingWhitespaces}}
+
+{{end}}{{if or .Runnable .HasSubCommands}}{{.UsageString}}{{end}}`
+}
+
+// VersionTemplate return version template for the command.
+func (c *Command) VersionTemplate() string {
+	if c.versionTemplate != "" {
+		return c.versionTemplate
+	}
+
+	if c.HasParent() {
+		return c.parent.VersionTemplate()
+	}
+	return `{{with .Name}}{{printf "%s " .}}{{end}}{{printf "version %s" .Version}}
+`
+}
+
+func hasNoOptDefVal(name string, fs *flag.FlagSet) bool {
+	flag := fs.Lookup(name)
+	if flag == nil {
+		return false
+	}
+	return flag.NoOptDefVal != ""
+}
+
+func shortHasNoOptDefVal(name string, fs *flag.FlagSet) bool {
+	if len(name) == 0 {
+		return false
+	}
+
+	flag := fs.ShorthandLookup(name[:1])
+	if flag == nil {
+		return false
+	}
+	return flag.NoOptDefVal != ""
+}
+
+func stripFlags(args []string, c *Command) []string {
+	if len(args) == 0 {
+		return args
+	}
+	c.mergePersistentFlags()
+
+	commands := []string{}
+	flags := c.Flags()
+
+Loop:
+	for len(args) > 0 {
+		s := args[0]
+		args = args[1:]
+		switch {
+		case s == "--":
+			// "--" terminates the flags
+			break Loop
+		case strings.HasPrefix(s, "--") && !strings.Contains(s, "=") && !hasNoOptDefVal(s[2:], flags):
+			// If '--flag arg' then
+			// delete arg from args.
+			fallthrough // (do the same as below)
+		case strings.HasPrefix(s, "-") && !strings.Contains(s, "=") && len(s) == 2 && !shortHasNoOptDefVal(s[1:], flags):
+			// If '-f arg' then
+			// delete 'arg' from args or break the loop if len(args) <= 1.
+			if len(args) <= 1 {
+				break Loop
+			} else {
+				args = args[1:]
+				continue
+			}
+		case s != "" && !strings.HasPrefix(s, "-"):
+			commands = append(commands, s)
+		}
+	}
+
+	return commands
+}
+
+// argsMinusFirstX removes only the first x from args.  Otherwise, commands that look like
+// openshift admin policy add-role-to-user admin my-user, lose the admin argument (arg[4]).
+func argsMinusFirstX(args []string, x string) []string {
+	for i, y := range args {
+		if x == y {
+			ret := []string{}
+			ret = append(ret, args[:i]...)
+			ret = append(ret, args[i+1:]...)
+			return ret
+		}
+	}
+	return args
+}
+
+func isFlagArg(arg string) bool {
+	return ((len(arg) >= 3 && arg[1] == '-') ||
+		(len(arg) >= 2 && arg[0] == '-' && arg[1] != '-'))
+}
+
+// Find the target command given the args and command tree
+// Meant to be run on the highest node. Only searches down.
+func (c *Command) Find(args []string) (*Command, []string, error) {
+	var innerfind func(*Command, []string) (*Command, []string)
+
+	innerfind = func(c *Command, innerArgs []string) (*Command, []string) {
+		argsWOflags := stripFlags(innerArgs, c)
+		if len(argsWOflags) == 0 {
+			return c, innerArgs
+		}
+		nextSubCmd := argsWOflags[0]
+
+		cmd := c.findNext(nextSubCmd)
+		if cmd != nil {
+			return innerfind(cmd, argsMinusFirstX(innerArgs, nextSubCmd))
+		}
+		return c, innerArgs
+	}
+
+	commandFound, a := innerfind(c, args)
+	if commandFound.Args == nil {
+		return commandFound, a, legacyArgs(commandFound, stripFlags(a, commandFound))
+	}
+	return commandFound, a, nil
+}
+
+func (c *Command) findSuggestions(arg string) string {
+	if c.DisableSuggestions {
+		return ""
+	}
+	if c.SuggestionsMinimumDistance <= 0 {
+		c.SuggestionsMinimumDistance = 2
+	}
+	suggestionsString := ""
+	if suggestions := c.SuggestionsFor(arg); len(suggestions) > 0 {
+		suggestionsString += "\n\nDid you mean this?\n"
+		for _, s := range suggestions {
+			suggestionsString += fmt.Sprintf("\t%v\n", s)
+		}
+	}
+	return suggestionsString
+}
+
+func (c *Command) findNext(next string) *Command {
+	matches := make([]*Command, 0)
+	for _, cmd := range c.commands {
+		if cmd.Name() == next || cmd.HasAlias(next) {
+			cmd.commandCalledAs.name = next
+			return cmd
+		}
+		if EnablePrefixMatching && cmd.hasNameOrAliasPrefix(next) {
+			matches = append(matches, cmd)
+		}
+	}
+
+	if len(matches) == 1 {
+		return matches[0]
+	}
+
+	return nil
+}
+
+// Traverse the command tree to find the command, and parse args for
+// each parent.
+func (c *Command) Traverse(args []string) (*Command, []string, error) {
+	flags := []string{}
+	inFlag := false
+
+	for i, arg := range args {
+		switch {
+		// A long flag with a space separated value
+		case strings.HasPrefix(arg, "--") && !strings.Contains(arg, "="):
+			// TODO: this isn't quite right, we should really check ahead for 'true' or 'false'
+			inFlag = !hasNoOptDefVal(arg[2:], c.Flags())
+			flags = append(flags, arg)
+			continue
+		// A short flag with a space separated value
+		case strings.HasPrefix(arg, "-") && !strings.Contains(arg, "=") && len(arg) == 2 && !shortHasNoOptDefVal(arg[1:], c.Flags()):
+			inFlag = true
+			flags = append(flags, arg)
+			continue
+		// The value for a flag
+		case inFlag:
+			inFlag = false
+			flags = append(flags, arg)
+			continue
+		// A flag without a value, or with an `=` separated value
+		case isFlagArg(arg):
+			flags = append(flags, arg)
+			continue
+		}
+
+		cmd := c.findNext(arg)
+		if cmd == nil {
+			return c, args, nil
+		}
+
+		if err := c.ParseFlags(flags); err != nil {
+			return nil, args, err
+		}
+		return cmd.Traverse(args[i+1:])
+	}
+	return c, args, nil
+}
+
+// SuggestionsFor provides suggestions for the typedName.
+func (c *Command) SuggestionsFor(typedName string) []string {
+	suggestions := []string{}
+	for _, cmd := range c.commands {
+		if cmd.IsAvailableCommand() {
+			levenshteinDistance := ld(typedName, cmd.Name(), true)
+			suggestByLevenshtein := levenshteinDistance <= c.SuggestionsMinimumDistance
+			suggestByPrefix := strings.HasPrefix(strings.ToLower(cmd.Name()), strings.ToLower(typedName))
+			if suggestByLevenshtein || suggestByPrefix {
+				suggestions = append(suggestions, cmd.Name())
+			}
+			for _, explicitSuggestion := range cmd.SuggestFor {
+				if strings.EqualFold(typedName, explicitSuggestion) {
+					suggestions = append(suggestions, cmd.Name())
+				}
+			}
+		}
+	}
+	return suggestions
+}
+
+// VisitParents visits all parents of the command and invokes fn on each parent.
+func (c *Command) VisitParents(fn func(*Command)) {
+	if c.HasParent() {
+		fn(c.Parent())
+		c.Parent().VisitParents(fn)
+	}
+}
+
+// Root finds root command.
+func (c *Command) Root() *Command {
+	if c.HasParent() {
+		return c.Parent().Root()
+	}
+	return c
+}
+
+// ArgsLenAtDash will return the length of c.Flags().Args at the moment
+// when a -- was found during args parsing.
+func (c *Command) ArgsLenAtDash() int {
+	return c.Flags().ArgsLenAtDash()
+}
+
+func (c *Command) execute(a []string) (err error) {
+	if c == nil {
+		return fmt.Errorf("Called Execute() on a nil Command")
+	}
+
+	if len(c.Deprecated) > 0 {
+		c.Printf("Command %q is deprecated, %s\n", c.Name(), c.Deprecated)
+	}
+
+	// initialize help and version flag at the last point possible to allow for user
+	// overriding
+	c.InitDefaultHelpFlag()
+	c.InitDefaultVersionFlag()
+
+	err = c.ParseFlags(a)
+	if err != nil {
+		return c.FlagErrorFunc()(c, err)
+	}
+
+	// If help is called, regardless of other flags, return we want help.
+	// Also say we need help if the command isn't runnable.
+	helpVal, err := c.Flags().GetBool("help")
+	if err != nil {
+		// should be impossible to get here as we always declare a help
+		// flag in InitDefaultHelpFlag()
+		c.Println("\"help\" flag declared as non-bool. Please correct your code")
+		return err
+	}
+
+	if helpVal {
+		return flag.ErrHelp
+	}
+
+	// for back-compat, only add version flag behavior if version is defined
+	if c.Version != "" {
+		versionVal, err := c.Flags().GetBool("version")
+		if err != nil {
+			c.Println("\"version\" flag declared as non-bool. Please correct your code")
+			return err
+		}
+		if versionVal {
+			err := tmpl(c.OutOrStdout(), c.VersionTemplate(), c)
+			if err != nil {
+				c.Println(err)
+			}
+			return err
+		}
+	}
+
+	if !c.Runnable() {
+		return flag.ErrHelp
+	}
+
+	c.preRun()
+
+	argWoFlags := c.Flags().Args()
+	if c.DisableFlagParsing {
+		argWoFlags = a
+	}
+
+	if err := c.ValidateArgs(argWoFlags); err != nil {
+		return err
+	}
+
+	for p := c; p != nil; p = p.Parent() {
+		if p.PersistentPreRunE != nil {
+			if err := p.PersistentPreRunE(c, argWoFlags); err != nil {
+				return err
+			}
+			break
+		} else if p.PersistentPreRun != nil {
+			p.PersistentPreRun(c, argWoFlags)
+			break
+		}
+	}
+	if c.PreRunE != nil {
+		if err := c.PreRunE(c, argWoFlags); err != nil {
+			return err
+		}
+	} else if c.PreRun != nil {
+		c.PreRun(c, argWoFlags)
+	}
+
+	if err := c.validateRequiredFlags(); err != nil {
+		return err
+	}
+	if c.RunE != nil {
+		if err := c.RunE(c, argWoFlags); err != nil {
+			return err
+		}
+	} else {
+		c.Run(c, argWoFlags)
+	}
+	if c.PostRunE != nil {
+		if err := c.PostRunE(c, argWoFlags); err != nil {
+			return err
+		}
+	} else if c.PostRun != nil {
+		c.PostRun(c, argWoFlags)
+	}
+	for p := c; p != nil; p = p.Parent() {
+		if p.PersistentPostRunE != nil {
+			if err := p.PersistentPostRunE(c, argWoFlags); err != nil {
+				return err
+			}
+			break
+		} else if p.PersistentPostRun != nil {
+			p.PersistentPostRun(c, argWoFlags)
+			break
+		}
+	}
+
+	return nil
+}
+
+func (c *Command) preRun() {
+	for _, x := range initializers {
+		x()
+	}
+}
+
+// Execute uses the args (os.Args[1:] by default)
+// and run through the command tree finding appropriate matches
+// for commands and then corresponding flags.
+func (c *Command) Execute() error {
+	_, err := c.ExecuteC()
+	return err
+}
+
+// ExecuteC executes the command.
+func (c *Command) ExecuteC() (cmd *Command, err error) {
+	// Regardless of what command execute is called on, run on Root only
+	if c.HasParent() {
+		return c.Root().ExecuteC()
+	}
+
+	// windows hook
+	if preExecHookFn != nil {
+		preExecHookFn(c)
+	}
+
+	// initialize help as the last point possible to allow for user
+	// overriding
+	c.InitDefaultHelpCmd()
+
+	var args []string
+
+	// Workaround FAIL with "go test -v" or "cobra.test -test.v", see #155
+	if c.args == nil && filepath.Base(os.Args[0]) != "cobra.test" {
+		args = os.Args[1:]
+	} else {
+		args = c.args
+	}
+
+	var flags []string
+	if c.TraverseChildren {
+		cmd, flags, err = c.Traverse(args)
+	} else {
+		cmd, flags, err = c.Find(args)
+	}
+	if err != nil {
+		// If found parse to a subcommand and then failed, talk about the subcommand
+		if cmd != nil {
+			c = cmd
+		}
+		if !c.SilenceErrors {
+			c.Println("Error:", err.Error())
+			c.Printf("Run '%v --help' for usage.\n", c.CommandPath())
+		}
+		return c, err
+	}
+
+	cmd.commandCalledAs.called = true
+	if cmd.commandCalledAs.name == "" {
+		cmd.commandCalledAs.name = cmd.Name()
+	}
+
+	err = cmd.execute(flags)
+	if err != nil {
+		// Always show help if requested, even if SilenceErrors is in
+		// effect
+		if err == flag.ErrHelp {
+			cmd.HelpFunc()(cmd, args)
+			return cmd, nil
+		}
+
+		// If root command has SilentErrors flagged,
+		// all subcommands should respect it
+		if !cmd.SilenceErrors && !c.SilenceErrors {
+			c.Println("Error:", err.Error())
+		}
+
+		// If root command has SilentUsage flagged,
+		// all subcommands should respect it
+		if !cmd.SilenceUsage && !c.SilenceUsage {
+			c.Println(cmd.UsageString())
+		}
+	}
+	return cmd, err
+}
+
+func (c *Command) ValidateArgs(args []string) error {
+	if c.Args == nil {
+		return nil
+	}
+	return c.Args(c, args)
+}
+
+func (c *Command) validateRequiredFlags() error {
+	flags := c.Flags()
+	missingFlagNames := []string{}
+	flags.VisitAll(func(pflag *flag.Flag) {
+		requiredAnnotation, found := pflag.Annotations[BashCompOneRequiredFlag]
+		if !found {
+			return
+		}
+		if (requiredAnnotation[0] == "true") && !pflag.Changed {
+			missingFlagNames = append(missingFlagNames, pflag.Name)
+		}
+	})
+
+	if len(missingFlagNames) > 0 {
+		return fmt.Errorf(`required flag(s) "%s" not set`, strings.Join(missingFlagNames, `", "`))
+	}
+	return nil
+}
+
+// InitDefaultHelpFlag adds default help flag to c.
+// It is called automatically by executing the c or by calling help and usage.
+// If c already has help flag, it will do nothing.
+func (c *Command) InitDefaultHelpFlag() {
+	c.mergePersistentFlags()
+	if c.Flags().Lookup("help") == nil {
+		usage := "help for "
+		if c.Name() == "" {
+			usage += "this command"
+		} else {
+			usage += c.Name()
+		}
+		c.Flags().BoolP("help", "h", false, usage)
+	}
+}
+
+// InitDefaultVersionFlag adds default version flag to c.
+// It is called automatically by executing the c.
+// If c already has a version flag, it will do nothing.
+// If c.Version is empty, it will do nothing.
+func (c *Command) InitDefaultVersionFlag() {
+	if c.Version == "" {
+		return
+	}
+
+	c.mergePersistentFlags()
+	if c.Flags().Lookup("version") == nil {
+		usage := "version for "
+		if c.Name() == "" {
+			usage += "this command"
+		} else {
+			usage += c.Name()
+		}
+		c.Flags().Bool("version", false, usage)
+	}
+}
+
+// InitDefaultHelpCmd adds default help command to c.
+// It is called automatically by executing the c or by calling help and usage.
+// If c already has help command or c has no subcommands, it will do nothing.
+func (c *Command) InitDefaultHelpCmd() {
+	if !c.HasSubCommands() {
+		return
+	}
+
+	if c.helpCommand == nil {
+		c.helpCommand = &Command{
+			Use:   "help [command]",
+			Short: "Help about any command",
+			Long: `Help provides help for any command in the application.
+Simply type ` + c.Name() + ` help [path to command] for full details.`,
+
+			Run: func(c *Command, args []string) {
+				cmd, _, e := c.Root().Find(args)
+				if cmd == nil || e != nil {
+					c.Printf("Unknown help topic %#q\n", args)
+					c.Root().Usage()
+				} else {
+					cmd.InitDefaultHelpFlag() // make possible 'help' flag to be shown
+					cmd.Help()
+				}
+			},
+		}
+	}
+	c.RemoveCommand(c.helpCommand)
+	c.AddCommand(c.helpCommand)
+}
+
+// ResetCommands delete parent, subcommand and help command from c.
+func (c *Command) ResetCommands() {
+	c.parent = nil
+	c.commands = nil
+	c.helpCommand = nil
+	c.parentsPflags = nil
+}
+
+// Sorts commands by their names.
+type commandSorterByName []*Command
+
+func (c commandSorterByName) Len() int           { return len(c) }
+func (c commandSorterByName) Swap(i, j int)      { c[i], c[j] = c[j], c[i] }
+func (c commandSorterByName) Less(i, j int) bool { return c[i].Name() < c[j].Name() }
+
+// Commands returns a sorted slice of child commands.
+func (c *Command) Commands() []*Command {
+	// do not sort commands if it already sorted or sorting was disabled
+	if EnableCommandSorting && !c.commandsAreSorted {
+		sort.Sort(commandSorterByName(c.commands))
+		c.commandsAreSorted = true
+	}
+	return c.commands
+}
+
+// AddCommand adds one or more commands to this parent command.
+func (c *Command) AddCommand(cmds ...*Command) {
+	for i, x := range cmds {
+		if cmds[i] == c {
+			panic("Command can't be a child of itself")
+		}
+		cmds[i].parent = c
+		// update max lengths
+		usageLen := len(x.Use)
+		if usageLen > c.commandsMaxUseLen {
+			c.commandsMaxUseLen = usageLen
+		}
+		commandPathLen := len(x.CommandPath())
+		if commandPathLen > c.commandsMaxCommandPathLen {
+			c.commandsMaxCommandPathLen = commandPathLen
+		}
+		nameLen := len(x.Name())
+		if nameLen > c.commandsMaxNameLen {
+			c.commandsMaxNameLen = nameLen
+		}
+		// If global normalization function exists, update all children
+		if c.globNormFunc != nil {
+			x.SetGlobalNormalizationFunc(c.globNormFunc)
+		}
+		c.commands = append(c.commands, x)
+		c.commandsAreSorted = false
+	}
+}
+
+// RemoveCommand removes one or more commands from a parent command.
+func (c *Command) RemoveCommand(cmds ...*Command) {
+	commands := []*Command{}
+main:
+	for _, command := range c.commands {
+		for _, cmd := range cmds {
+			if command == cmd {
+				command.parent = nil
+				continue main
+			}
+		}
+		commands = append(commands, command)
+	}
+	c.commands = commands
+	// recompute all lengths
+	c.commandsMaxUseLen = 0
+	c.commandsMaxCommandPathLen = 0
+	c.commandsMaxNameLen = 0
+	for _, command := range c.commands {
+		usageLen := len(command.Use)
+		if usageLen > c.commandsMaxUseLen {
+			c.commandsMaxUseLen = usageLen
+		}
+		commandPathLen := len(command.CommandPath())
+		if commandPathLen > c.commandsMaxCommandPathLen {
+			c.commandsMaxCommandPathLen = commandPathLen
+		}
+		nameLen := len(command.Name())
+		if nameLen > c.commandsMaxNameLen {
+			c.commandsMaxNameLen = nameLen
+		}
+	}
+}
+
+// Print is a convenience method to Print to the defined output, fallback to Stderr if not set.
+func (c *Command) Print(i ...interface{}) {
+	fmt.Fprint(c.OutOrStderr(), i...)
+}
+
+// Println is a convenience method to Println to the defined output, fallback to Stderr if not set.
+func (c *Command) Println(i ...interface{}) {
+	c.Print(fmt.Sprintln(i...))
+}
+
+// Printf is a convenience method to Printf to the defined output, fallback to Stderr if not set.
+func (c *Command) Printf(format string, i ...interface{}) {
+	c.Print(fmt.Sprintf(format, i...))
+}
+
+// CommandPath returns the full path to this command.
+func (c *Command) CommandPath() string {
+	if c.HasParent() {
+		return c.Parent().CommandPath() + " " + c.Name()
+	}
+	return c.Name()
+}
+
+// UseLine puts out the full usage for a given command (including parents).
+func (c *Command) UseLine() string {
+	var useline string
+	if c.HasParent() {
+		useline = c.parent.CommandPath() + " " + c.Use
+	} else {
+		useline = c.Use
+	}
+	if c.DisableFlagsInUseLine {
+		return useline
+	}
+	if c.HasAvailableFlags() && !strings.Contains(useline, "[flags]") {
+		useline += " [flags]"
+	}
+	return useline
+}
+
+// DebugFlags used to determine which flags have been assigned to which commands
+// and which persist.
+func (c *Command) DebugFlags() {
+	c.Println("DebugFlags called on", c.Name())
+	var debugflags func(*Command)
+
+	debugflags = func(x *Command) {
+		if x.HasFlags() || x.HasPersistentFlags() {
+			c.Println(x.Name())
+		}
+		if x.HasFlags() {
+			x.flags.VisitAll(func(f *flag.Flag) {
+				if x.HasPersistentFlags() && x.persistentFlag(f.Name) != nil {
+					c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [LP]")
+				} else {
+					c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [L]")
+				}
+			})
+		}
+		if x.HasPersistentFlags() {
+			x.pflags.VisitAll(func(f *flag.Flag) {
+				if x.HasFlags() {
+					if x.flags.Lookup(f.Name) == nil {
+						c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [P]")
+					}
+				} else {
+					c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [P]")
+				}
+			})
+		}
+		c.Println(x.flagErrorBuf)
+		if x.HasSubCommands() {
+			for _, y := range x.commands {
+				debugflags(y)
+			}
+		}
+	}
+
+	debugflags(c)
+}
+
+// Name returns the command's name: the first word in the use line.
+func (c *Command) Name() string {
+	name := c.Use
+	i := strings.Index(name, " ")
+	if i >= 0 {
+		name = name[:i]
+	}
+	return name
+}
+
+// HasAlias determines if a given string is an alias of the command.
+func (c *Command) HasAlias(s string) bool {
+	for _, a := range c.Aliases {
+		if a == s {
+			return true
+		}
+	}
+	return false
+}
+
+// CalledAs returns the command name or alias that was used to invoke
+// this command or an empty string if the command has not been called.
+func (c *Command) CalledAs() string {
+	if c.commandCalledAs.called {
+		return c.commandCalledAs.name
+	}
+	return ""
+}
+
+// hasNameOrAliasPrefix returns true if the Name or any of aliases start
+// with prefix
+func (c *Command) hasNameOrAliasPrefix(prefix string) bool {
+	if strings.HasPrefix(c.Name(), prefix) {
+		c.commandCalledAs.name = c.Name()
+		return true
+	}
+	for _, alias := range c.Aliases {
+		if strings.HasPrefix(alias, prefix) {
+			c.commandCalledAs.name = alias
+			return true
+		}
+	}
+	return false
+}
+
+// NameAndAliases returns a list of the command name and all aliases
+func (c *Command) NameAndAliases() string {
+	return strings.Join(append([]string{c.Name()}, c.Aliases...), ", ")
+}
+
+// HasExample determines if the command has example.
+func (c *Command) HasExample() bool {
+	return len(c.Example) > 0
+}
+
+// Runnable determines if the command is itself runnable.
+func (c *Command) Runnable() bool {
+	return c.Run != nil || c.RunE != nil
+}
+
+// HasSubCommands determines if the command has children commands.
+func (c *Command) HasSubCommands() bool {
+	return len(c.commands) > 0
+}
+
+// IsAvailableCommand determines if a command is available as a non-help command
+// (this includes all non deprecated/hidden commands).
+func (c *Command) IsAvailableCommand() bool {
+	if len(c.Deprecated) != 0 || c.Hidden {
+		return false
+	}
+
+	if c.HasParent() && c.Parent().helpCommand == c {
+		return false
+	}
+
+	if c.Runnable() || c.HasAvailableSubCommands() {
+		return true
+	}
+
+	return false
+}
+
+// IsAdditionalHelpTopicCommand determines if a command is an additional
+// help topic command; additional help topic command is determined by the
+// fact that it is NOT runnable/hidden/deprecated, and has no sub commands that
+// are runnable/hidden/deprecated.
+// Concrete example: https://github.com/spf13/cobra/issues/393#issuecomment-282741924.
+func (c *Command) IsAdditionalHelpTopicCommand() bool {
+	// if a command is runnable, deprecated, or hidden it is not a 'help' command
+	if c.Runnable() || len(c.Deprecated) != 0 || c.Hidden {
+		return false
+	}
+
+	// if any non-help sub commands are found, the command is not a 'help' command
+	for _, sub := range c.commands {
+		if !sub.IsAdditionalHelpTopicCommand() {
+			return false
+		}
+	}
+
+	// the command either has no sub commands, or no non-help sub commands
+	return true
+}
+
+// HasHelpSubCommands determines if a command has any available 'help' sub commands
+// that need to be shown in the usage/help default template under 'additional help
+// topics'.
+func (c *Command) HasHelpSubCommands() bool {
+	// return true on the first found available 'help' sub command
+	for _, sub := range c.commands {
+		if sub.IsAdditionalHelpTopicCommand() {
+			return true
+		}
+	}
+
+	// the command either has no sub commands, or no available 'help' sub commands
+	return false
+}
+
+// HasAvailableSubCommands determines if a command has available sub commands that
+// need to be shown in the usage/help default template under 'available commands'.
+func (c *Command) HasAvailableSubCommands() bool {
+	// return true on the first found available (non deprecated/help/hidden)
+	// sub command
+	for _, sub := range c.commands {
+		if sub.IsAvailableCommand() {
+			return true
+		}
+	}
+
+	// the command either has no sub commands, or no available (non deprecated/help/hidden)
+	// sub commands
+	return false
+}
+
+// HasParent determines if the command is a child command.
+func (c *Command) HasParent() bool {
+	return c.parent != nil
+}
+
+// GlobalNormalizationFunc returns the global normalization function or nil if it doesn't exist.
+func (c *Command) GlobalNormalizationFunc() func(f *flag.FlagSet, name string) flag.NormalizedName {
+	return c.globNormFunc
+}
+
+// Flags returns the complete FlagSet that applies
+// to this command (local and persistent declared here and by all parents).
+func (c *Command) Flags() *flag.FlagSet {
+	if c.flags == nil {
+		c.flags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		if c.flagErrorBuf == nil {
+			c.flagErrorBuf = new(bytes.Buffer)
+		}
+		c.flags.SetOutput(c.flagErrorBuf)
+	}
+
+	return c.flags
+}
+
+// LocalNonPersistentFlags are flags specific to this command which will NOT persist to subcommands.
+func (c *Command) LocalNonPersistentFlags() *flag.FlagSet {
+	persistentFlags := c.PersistentFlags()
+
+	out := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	c.LocalFlags().VisitAll(func(f *flag.Flag) {
+		if persistentFlags.Lookup(f.Name) == nil {
+			out.AddFlag(f)
+		}
+	})
+	return out
+}
+
+// LocalFlags returns the local FlagSet specifically set in the current command.
+func (c *Command) LocalFlags() *flag.FlagSet {
+	c.mergePersistentFlags()
+
+	if c.lflags == nil {
+		c.lflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		if c.flagErrorBuf == nil {
+			c.flagErrorBuf = new(bytes.Buffer)
+		}
+		c.lflags.SetOutput(c.flagErrorBuf)
+	}
+	c.lflags.SortFlags = c.Flags().SortFlags
+	if c.globNormFunc != nil {
+		c.lflags.SetNormalizeFunc(c.globNormFunc)
+	}
+
+	addToLocal := func(f *flag.Flag) {
+		if c.lflags.Lookup(f.Name) == nil && c.parentsPflags.Lookup(f.Name) == nil {
+			c.lflags.AddFlag(f)
+		}
+	}
+	c.Flags().VisitAll(addToLocal)
+	c.PersistentFlags().VisitAll(addToLocal)
+	return c.lflags
+}
+
+// InheritedFlags returns all flags which were inherited from parents commands.
+func (c *Command) InheritedFlags() *flag.FlagSet {
+	c.mergePersistentFlags()
+
+	if c.iflags == nil {
+		c.iflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		if c.flagErrorBuf == nil {
+			c.flagErrorBuf = new(bytes.Buffer)
+		}
+		c.iflags.SetOutput(c.flagErrorBuf)
+	}
+
+	local := c.LocalFlags()
+	if c.globNormFunc != nil {
+		c.iflags.SetNormalizeFunc(c.globNormFunc)
+	}
+
+	c.parentsPflags.VisitAll(func(f *flag.Flag) {
+		if c.iflags.Lookup(f.Name) == nil && local.Lookup(f.Name) == nil {
+			c.iflags.AddFlag(f)
+		}
+	})
+	return c.iflags
+}
+
+// NonInheritedFlags returns all flags which were not inherited from parent commands.
+func (c *Command) NonInheritedFlags() *flag.FlagSet {
+	return c.LocalFlags()
+}
+
+// PersistentFlags returns the persistent FlagSet specifically set in the current command.
+func (c *Command) PersistentFlags() *flag.FlagSet {
+	if c.pflags == nil {
+		c.pflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		if c.flagErrorBuf == nil {
+			c.flagErrorBuf = new(bytes.Buffer)
+		}
+		c.pflags.SetOutput(c.flagErrorBuf)
+	}
+	return c.pflags
+}
+
+// ResetFlags deletes all flags from command.
+func (c *Command) ResetFlags() {
+	c.flagErrorBuf = new(bytes.Buffer)
+	c.flagErrorBuf.Reset()
+	c.flags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	c.flags.SetOutput(c.flagErrorBuf)
+	c.pflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	c.pflags.SetOutput(c.flagErrorBuf)
+
+	c.lflags = nil
+	c.iflags = nil
+	c.parentsPflags = nil
+}
+
+// HasFlags checks if the command contains any flags (local plus persistent from the entire structure).
+func (c *Command) HasFlags() bool {
+	return c.Flags().HasFlags()
+}
+
+// HasPersistentFlags checks if the command contains persistent flags.
+func (c *Command) HasPersistentFlags() bool {
+	return c.PersistentFlags().HasFlags()
+}
+
+// HasLocalFlags checks if the command has flags specifically declared locally.
+func (c *Command) HasLocalFlags() bool {
+	return c.LocalFlags().HasFlags()
+}
+
+// HasInheritedFlags checks if the command has flags inherited from its parent command.
+func (c *Command) HasInheritedFlags() bool {
+	return c.InheritedFlags().HasFlags()
+}
+
+// HasAvailableFlags checks if the command contains any flags (local plus persistent from the entire
+// structure) which are not hidden or deprecated.
+func (c *Command) HasAvailableFlags() bool {
+	return c.Flags().HasAvailableFlags()
+}
+
+// HasAvailablePersistentFlags checks if the command contains persistent flags which are not hidden or deprecated.
+func (c *Command) HasAvailablePersistentFlags() bool {
+	return c.PersistentFlags().HasAvailableFlags()
+}
+
+// HasAvailableLocalFlags checks if the command has flags specifically declared locally which are not hidden
+// or deprecated.
+func (c *Command) HasAvailableLocalFlags() bool {
+	return c.LocalFlags().HasAvailableFlags()
+}
+
+// HasAvailableInheritedFlags checks if the command has flags inherited from its parent command which are
+// not hidden or deprecated.
+func (c *Command) HasAvailableInheritedFlags() bool {
+	return c.InheritedFlags().HasAvailableFlags()
+}
+
+// Flag climbs up the command tree looking for matching flag.
+func (c *Command) Flag(name string) (flag *flag.Flag) {
+	flag = c.Flags().Lookup(name)
+
+	if flag == nil {
+		flag = c.persistentFlag(name)
+	}
+
+	return
+}
+
+// Recursively find matching persistent flag.
+func (c *Command) persistentFlag(name string) (flag *flag.Flag) {
+	if c.HasPersistentFlags() {
+		flag = c.PersistentFlags().Lookup(name)
+	}
+
+	if flag == nil {
+		c.updateParentsPflags()
+		flag = c.parentsPflags.Lookup(name)
+	}
+	return
+}
+
+// ParseFlags parses persistent flag tree and local flags.
+func (c *Command) ParseFlags(args []string) error {
+	if c.DisableFlagParsing {
+		return nil
+	}
+
+	if c.flagErrorBuf == nil {
+		c.flagErrorBuf = new(bytes.Buffer)
+	}
+	beforeErrorBufLen := c.flagErrorBuf.Len()
+	c.mergePersistentFlags()
+
+	//do it here after merging all flags and just before parse
+	c.Flags().ParseErrorsWhitelist = flag.ParseErrorsWhitelist(c.FParseErrWhitelist)
+
+	err := c.Flags().Parse(args)
+	// Print warnings if they occurred (e.g. deprecated flag messages).
+	if c.flagErrorBuf.Len()-beforeErrorBufLen > 0 && err == nil {
+		c.Print(c.flagErrorBuf.String())
+	}
+
+	return err
+}
+
+// Parent returns a commands parent command.
+func (c *Command) Parent() *Command {
+	return c.parent
+}
+
+// mergePersistentFlags merges c.PersistentFlags() to c.Flags()
+// and adds missing persistent flags of all parents.
+func (c *Command) mergePersistentFlags() {
+	c.updateParentsPflags()
+	c.Flags().AddFlagSet(c.PersistentFlags())
+	c.Flags().AddFlagSet(c.parentsPflags)
+}
+
+// updateParentsPflags updates c.parentsPflags by adding
+// new persistent flags of all parents.
+// If c.parentsPflags == nil, it makes new.
+func (c *Command) updateParentsPflags() {
+	if c.parentsPflags == nil {
+		c.parentsPflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		c.parentsPflags.SetOutput(c.flagErrorBuf)
+		c.parentsPflags.SortFlags = false
+	}
+
+	if c.globNormFunc != nil {
+		c.parentsPflags.SetNormalizeFunc(c.globNormFunc)
+	}
+
+	c.Root().PersistentFlags().AddFlagSet(flag.CommandLine)
+
+	c.VisitParents(func(parent *Command) {
+		c.parentsPflags.AddFlagSet(parent.PersistentFlags())
+	})
+}

vendor/github.com/spf13/cobra/command_notwin.go

@@ -0,0 +1,5 @@
+// +build !windows
+
+package cobra
+
+var preExecHookFn func(*Command)

vendor/github.com/spf13/cobra/command_test.go

@@ -0,0 +1,1733 @@
+package cobra
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"reflect"
+	"strings"
+	"testing"
+
+	"github.com/spf13/pflag"
+)
+
+func emptyRun(*Command, []string) {}
+
+func executeCommand(root *Command, args ...string) (output string, err error) {
+	_, output, err = executeCommandC(root, args...)
+	return output, err
+}
+
+func executeCommandC(root *Command, args ...string) (c *Command, output string, err error) {
+	buf := new(bytes.Buffer)
+	root.SetOutput(buf)
+	root.SetArgs(args)
+
+	c, err = root.ExecuteC()
+
+	return c, buf.String(), err
+}
+
+func resetCommandLineFlagSet() {
+	pflag.CommandLine = pflag.NewFlagSet(os.Args[0], pflag.ExitOnError)
+}
+
+func checkStringContains(t *testing.T, got, expected string) {
+	if !strings.Contains(got, expected) {
+		t.Errorf("Expected to contain: \n %v\nGot:\n %v\n", expected, got)
+	}
+}
+
+func checkStringOmits(t *testing.T, got, expected string) {
+	if strings.Contains(got, expected) {
+		t.Errorf("Expected to not contain: \n %v\nGot: %v", expected, got)
+	}
+}
+
+func TestSingleCommand(t *testing.T) {
+	var rootCmdArgs []string
+	rootCmd := &Command{
+		Use:  "root",
+		Args: ExactArgs(2),
+		Run:  func(_ *Command, args []string) { rootCmdArgs = args },
+	}
+	aCmd := &Command{Use: "a", Args: NoArgs, Run: emptyRun}
+	bCmd := &Command{Use: "b", Args: NoArgs, Run: emptyRun}
+	rootCmd.AddCommand(aCmd, bCmd)
+
+	output, err := executeCommand(rootCmd, "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	got := strings.Join(rootCmdArgs, " ")
+	expected := "one two"
+	if got != expected {
+		t.Errorf("rootCmdArgs expected: %q, got: %q", expected, got)
+	}
+}
+
+func TestChildCommand(t *testing.T) {
+	var child1CmdArgs []string
+	rootCmd := &Command{Use: "root", Args: NoArgs, Run: emptyRun}
+	child1Cmd := &Command{
+		Use:  "child1",
+		Args: ExactArgs(2),
+		Run:  func(_ *Command, args []string) { child1CmdArgs = args },
+	}
+	child2Cmd := &Command{Use: "child2", Args: NoArgs, Run: emptyRun}
+	rootCmd.AddCommand(child1Cmd, child2Cmd)
+
+	output, err := executeCommand(rootCmd, "child1", "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	got := strings.Join(child1CmdArgs, " ")
+	expected := "one two"
+	if got != expected {
+		t.Errorf("child1CmdArgs expected: %q, got: %q", expected, got)
+	}
+}
+
+func TestCallCommandWithoutSubcommands(t *testing.T) {
+	rootCmd := &Command{Use: "root", Args: NoArgs, Run: emptyRun}
+	_, err := executeCommand(rootCmd)
+	if err != nil {
+		t.Errorf("Calling command without subcommands should not have error: %v", err)
+	}
+}
+
+func TestRootExecuteUnknownCommand(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	rootCmd.AddCommand(&Command{Use: "child", Run: emptyRun})
+
+	output, _ := executeCommand(rootCmd, "unknown")
+
+	expected := "Error: unknown command \"unknown\" for \"root\"\nRun 'root --help' for usage.\n"
+
+	if output != expected {
+		t.Errorf("Expected:\n %q\nGot:\n %q\n", expected, output)
+	}
+}
+
+func TestSubcommandExecuteC(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{Use: "child", Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+
+	c, output, err := executeCommandC(rootCmd, "child")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	if c.Name() != "child" {
+		t.Errorf(`invalid command returned from ExecuteC: expected "child"', got %q`, c.Name())
+	}
+}
+
+func TestRootUnknownCommandSilenced(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	rootCmd.SilenceErrors = true
+	rootCmd.SilenceUsage = true
+	rootCmd.AddCommand(&Command{Use: "child", Run: emptyRun})
+
+	output, _ := executeCommand(rootCmd, "unknown")
+	if output != "" {
+		t.Errorf("Expected blank output, because of silenced usage.\nGot:\n %q\n", output)
+	}
+}
+
+func TestCommandAlias(t *testing.T) {
+	var timesCmdArgs []string
+	rootCmd := &Command{Use: "root", Args: NoArgs, Run: emptyRun}
+	echoCmd := &Command{
+		Use:     "echo",
+		Aliases: []string{"say", "tell"},
+		Args:    NoArgs,
+		Run:     emptyRun,
+	}
+	timesCmd := &Command{
+		Use:  "times",
+		Args: ExactArgs(2),
+		Run:  func(_ *Command, args []string) { timesCmdArgs = args },
+	}
+	echoCmd.AddCommand(timesCmd)
+	rootCmd.AddCommand(echoCmd)
+
+	output, err := executeCommand(rootCmd, "tell", "times", "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	got := strings.Join(timesCmdArgs, " ")
+	expected := "one two"
+	if got != expected {
+		t.Errorf("timesCmdArgs expected: %v, got: %v", expected, got)
+	}
+}
+
+func TestEnablePrefixMatching(t *testing.T) {
+	EnablePrefixMatching = true
+
+	var aCmdArgs []string
+	rootCmd := &Command{Use: "root", Args: NoArgs, Run: emptyRun}
+	aCmd := &Command{
+		Use:  "aCmd",
+		Args: ExactArgs(2),
+		Run:  func(_ *Command, args []string) { aCmdArgs = args },
+	}
+	bCmd := &Command{Use: "bCmd", Args: NoArgs, Run: emptyRun}
+	rootCmd.AddCommand(aCmd, bCmd)
+
+	output, err := executeCommand(rootCmd, "a", "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	got := strings.Join(aCmdArgs, " ")
+	expected := "one two"
+	if got != expected {
+		t.Errorf("aCmdArgs expected: %q, got: %q", expected, got)
+	}
+
+	EnablePrefixMatching = false
+}
+
+func TestAliasPrefixMatching(t *testing.T) {
+	EnablePrefixMatching = true
+
+	var timesCmdArgs []string
+	rootCmd := &Command{Use: "root", Args: NoArgs, Run: emptyRun}
+	echoCmd := &Command{
+		Use:     "echo",
+		Aliases: []string{"say", "tell"},
+		Args:    NoArgs,
+		Run:     emptyRun,
+	}
+	timesCmd := &Command{
+		Use:  "times",
+		Args: ExactArgs(2),
+		Run:  func(_ *Command, args []string) { timesCmdArgs = args },
+	}
+	echoCmd.AddCommand(timesCmd)
+	rootCmd.AddCommand(echoCmd)
+
+	output, err := executeCommand(rootCmd, "sa", "times", "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	got := strings.Join(timesCmdArgs, " ")
+	expected := "one two"
+	if got != expected {
+		t.Errorf("timesCmdArgs expected: %v, got: %v", expected, got)
+	}
+
+	EnablePrefixMatching = false
+}
+
+// TestChildSameName checks the correct behaviour of cobra in cases,
+// when an application with name "foo" and with subcommand "foo"
+// is executed with args "foo foo".
+func TestChildSameName(t *testing.T) {
+	var fooCmdArgs []string
+	rootCmd := &Command{Use: "foo", Args: NoArgs, Run: emptyRun}
+	fooCmd := &Command{
+		Use:  "foo",
+		Args: ExactArgs(2),
+		Run:  func(_ *Command, args []string) { fooCmdArgs = args },
+	}
+	barCmd := &Command{Use: "bar", Args: NoArgs, Run: emptyRun}
+	rootCmd.AddCommand(fooCmd, barCmd)
+
+	output, err := executeCommand(rootCmd, "foo", "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	got := strings.Join(fooCmdArgs, " ")
+	expected := "one two"
+	if got != expected {
+		t.Errorf("fooCmdArgs expected: %v, got: %v", expected, got)
+	}
+}
+
+// TestGrandChildSameName checks the correct behaviour of cobra in cases,
+// when user has a root command and a grand child
+// with the same name.
+func TestGrandChildSameName(t *testing.T) {
+	var fooCmdArgs []string
+	rootCmd := &Command{Use: "foo", Args: NoArgs, Run: emptyRun}
+	barCmd := &Command{Use: "bar", Args: NoArgs, Run: emptyRun}
+	fooCmd := &Command{
+		Use:  "foo",
+		Args: ExactArgs(2),
+		Run:  func(_ *Command, args []string) { fooCmdArgs = args },
+	}
+	barCmd.AddCommand(fooCmd)
+	rootCmd.AddCommand(barCmd)
+
+	output, err := executeCommand(rootCmd, "bar", "foo", "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	got := strings.Join(fooCmdArgs, " ")
+	expected := "one two"
+	if got != expected {
+		t.Errorf("fooCmdArgs expected: %v, got: %v", expected, got)
+	}
+}
+
+func TestFlagLong(t *testing.T) {
+	var cArgs []string
+	c := &Command{
+		Use:  "c",
+		Args: ArbitraryArgs,
+		Run:  func(_ *Command, args []string) { cArgs = args },
+	}
+
+	var intFlagValue int
+	var stringFlagValue string
+	c.Flags().IntVar(&intFlagValue, "intf", -1, "")
+	c.Flags().StringVar(&stringFlagValue, "sf", "", "")
+
+	output, err := executeCommand(c, "--intf=7", "--sf=abc", "one", "--", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", err)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	if c.ArgsLenAtDash() != 1 {
+		t.Errorf("Expected ArgsLenAtDash: %v but got %v", 1, c.ArgsLenAtDash())
+	}
+	if intFlagValue != 7 {
+		t.Errorf("Expected intFlagValue: %v, got %v", 7, intFlagValue)
+	}
+	if stringFlagValue != "abc" {
+		t.Errorf("Expected stringFlagValue: %q, got %q", "abc", stringFlagValue)
+	}
+
+	got := strings.Join(cArgs, " ")
+	expected := "one two"
+	if got != expected {
+		t.Errorf("Expected arguments: %q, got %q", expected, got)
+	}
+}
+
+func TestFlagShort(t *testing.T) {
+	var cArgs []string
+	c := &Command{
+		Use:  "c",
+		Args: ArbitraryArgs,
+		Run:  func(_ *Command, args []string) { cArgs = args },
+	}
+
+	var intFlagValue int
+	var stringFlagValue string
+	c.Flags().IntVarP(&intFlagValue, "intf", "i", -1, "")
+	c.Flags().StringVarP(&stringFlagValue, "sf", "s", "", "")
+
+	output, err := executeCommand(c, "-i", "7", "-sabc", "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", err)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	if intFlagValue != 7 {
+		t.Errorf("Expected flag value: %v, got %v", 7, intFlagValue)
+	}
+	if stringFlagValue != "abc" {
+		t.Errorf("Expected stringFlagValue: %q, got %q", "abc", stringFlagValue)
+	}
+
+	got := strings.Join(cArgs, " ")
+	expected := "one two"
+	if got != expected {
+		t.Errorf("Expected arguments: %q, got %q", expected, got)
+	}
+}
+
+func TestChildFlag(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{Use: "child", Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+
+	var intFlagValue int
+	childCmd.Flags().IntVarP(&intFlagValue, "intf", "i", -1, "")
+
+	output, err := executeCommand(rootCmd, "child", "-i7")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", err)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	if intFlagValue != 7 {
+		t.Errorf("Expected flag value: %v, got %v", 7, intFlagValue)
+	}
+}
+
+func TestChildFlagWithParentLocalFlag(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{Use: "child", Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+
+	var intFlagValue int
+	rootCmd.Flags().StringP("sf", "s", "", "")
+	childCmd.Flags().IntVarP(&intFlagValue, "intf", "i", -1, "")
+
+	_, err := executeCommand(rootCmd, "child", "-i7", "-sabc")
+	if err == nil {
+		t.Errorf("Invalid flag should generate error")
+	}
+
+	checkStringContains(t, err.Error(), "unknown shorthand")
+
+	if intFlagValue != 7 {
+		t.Errorf("Expected flag value: %v, got %v", 7, intFlagValue)
+	}
+}
+
+func TestFlagInvalidInput(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	rootCmd.Flags().IntP("intf", "i", -1, "")
+
+	_, err := executeCommand(rootCmd, "-iabc")
+	if err == nil {
+		t.Errorf("Invalid flag value should generate error")
+	}
+
+	checkStringContains(t, err.Error(), "invalid syntax")
+}
+
+func TestFlagBeforeCommand(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{Use: "child", Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+
+	var flagValue int
+	childCmd.Flags().IntVarP(&flagValue, "intf", "i", -1, "")
+
+	// With short flag.
+	_, err := executeCommand(rootCmd, "-i7", "child")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if flagValue != 7 {
+		t.Errorf("Expected flag value: %v, got %v", 7, flagValue)
+	}
+
+	// With long flag.
+	_, err = executeCommand(rootCmd, "--intf=8", "child")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if flagValue != 8 {
+		t.Errorf("Expected flag value: %v, got %v", 9, flagValue)
+	}
+}
+
+func TestStripFlags(t *testing.T) {
+	tests := []struct {
+		input  []string
+		output []string
+	}{
+		{
+			[]string{"foo", "bar"},
+			[]string{"foo", "bar"},
+		},
+		{
+			[]string{"foo", "--str", "-s"},
+			[]string{"foo"},
+		},
+		{
+			[]string{"-s", "foo", "--str", "bar"},
+			[]string{},
+		},
+		{
+			[]string{"-i10", "echo"},
+			[]string{"echo"},
+		},
+		{
+			[]string{"-i=10", "echo"},
+			[]string{"echo"},
+		},
+		{
+			[]string{"--int=100", "echo"},
+			[]string{"echo"},
+		},
+		{
+			[]string{"-ib", "echo", "-sfoo", "baz"},
+			[]string{"echo", "baz"},
+		},
+		{
+			[]string{"-i=baz", "bar", "-i", "foo", "blah"},
+			[]string{"bar", "blah"},
+		},
+		{
+			[]string{"--int=baz", "-sbar", "-i", "foo", "blah"},
+			[]string{"blah"},
+		},
+		{
+			[]string{"--bool", "bar", "-i", "foo", "blah"},
+			[]string{"bar", "blah"},
+		},
+		{
+			[]string{"-b", "bar", "-i", "foo", "blah"},
+			[]string{"bar", "blah"},
+		},
+		{
+			[]string{"--persist", "bar"},
+			[]string{"bar"},
+		},
+		{
+			[]string{"-p", "bar"},
+			[]string{"bar"},
+		},
+	}
+
+	c := &Command{Use: "c", Run: emptyRun}
+	c.PersistentFlags().BoolP("persist", "p", false, "")
+	c.Flags().IntP("int", "i", -1, "")
+	c.Flags().StringP("str", "s", "", "")
+	c.Flags().BoolP("bool", "b", false, "")
+
+	for i, test := range tests {
+		got := stripFlags(test.input, c)
+		if !reflect.DeepEqual(test.output, got) {
+			t.Errorf("(%v) Expected: %v, got: %v", i, test.output, got)
+		}
+	}
+}
+
+func TestDisableFlagParsing(t *testing.T) {
+	var cArgs []string
+	c := &Command{
+		Use:                "c",
+		DisableFlagParsing: true,
+		Run: func(_ *Command, args []string) {
+			cArgs = args
+		},
+	}
+
+	args := []string{"cmd", "-v", "-race", "-file", "foo.go"}
+	output, err := executeCommand(c, args...)
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	if !reflect.DeepEqual(args, cArgs) {
+		t.Errorf("Expected: %v, got: %v", args, cArgs)
+	}
+}
+
+func TestPersistentFlagsOnSameCommand(t *testing.T) {
+	var rootCmdArgs []string
+	rootCmd := &Command{
+		Use:  "root",
+		Args: ArbitraryArgs,
+		Run:  func(_ *Command, args []string) { rootCmdArgs = args },
+	}
+
+	var flagValue int
+	rootCmd.PersistentFlags().IntVarP(&flagValue, "intf", "i", -1, "")
+
+	output, err := executeCommand(rootCmd, "-i7", "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	got := strings.Join(rootCmdArgs, " ")
+	expected := "one two"
+	if got != expected {
+		t.Errorf("rootCmdArgs expected: %q, got %q", expected, got)
+	}
+	if flagValue != 7 {
+		t.Errorf("flagValue expected: %v, got %v", 7, flagValue)
+	}
+}
+
+// TestEmptyInputs checks,
+// if flags correctly parsed with blank strings in args.
+func TestEmptyInputs(t *testing.T) {
+	c := &Command{Use: "c", Run: emptyRun}
+
+	var flagValue int
+	c.Flags().IntVarP(&flagValue, "intf", "i", -1, "")
+
+	output, err := executeCommand(c, "", "-i7", "")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	if flagValue != 7 {
+		t.Errorf("flagValue expected: %v, got %v", 7, flagValue)
+	}
+}
+
+func TestOverwrittenFlag(t *testing.T) {
+	// TODO: This test fails, but should work.
+	t.Skip()
+
+	parent := &Command{Use: "parent", Run: emptyRun}
+	child := &Command{Use: "child", Run: emptyRun}
+
+	parent.PersistentFlags().Bool("boolf", false, "")
+	parent.PersistentFlags().Int("intf", -1, "")
+	child.Flags().String("strf", "", "")
+	child.Flags().Int("intf", -1, "")
+
+	parent.AddCommand(child)
+
+	childInherited := child.InheritedFlags()
+	childLocal := child.LocalFlags()
+
+	if childLocal.Lookup("strf") == nil {
+		t.Error(`LocalFlags expected to contain "strf", got "nil"`)
+	}
+	if childInherited.Lookup("boolf") == nil {
+		t.Error(`InheritedFlags expected to contain "boolf", got "nil"`)
+	}
+
+	if childInherited.Lookup("intf") != nil {
+		t.Errorf(`InheritedFlags should not contain overwritten flag "intf"`)
+	}
+	if childLocal.Lookup("intf") == nil {
+		t.Error(`LocalFlags expected to contain "intf", got "nil"`)
+	}
+}
+
+func TestPersistentFlagsOnChild(t *testing.T) {
+	var childCmdArgs []string
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{
+		Use:  "child",
+		Args: ArbitraryArgs,
+		Run:  func(_ *Command, args []string) { childCmdArgs = args },
+	}
+	rootCmd.AddCommand(childCmd)
+
+	var parentFlagValue int
+	var childFlagValue int
+	rootCmd.PersistentFlags().IntVarP(&parentFlagValue, "parentf", "p", -1, "")
+	childCmd.Flags().IntVarP(&childFlagValue, "childf", "c", -1, "")
+
+	output, err := executeCommand(rootCmd, "child", "-c7", "-p8", "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	got := strings.Join(childCmdArgs, " ")
+	expected := "one two"
+	if got != expected {
+		t.Errorf("childCmdArgs expected: %q, got %q", expected, got)
+	}
+	if parentFlagValue != 8 {
+		t.Errorf("parentFlagValue expected: %v, got %v", 8, parentFlagValue)
+	}
+	if childFlagValue != 7 {
+		t.Errorf("childFlagValue expected: %v, got %v", 7, childFlagValue)
+	}
+}
+
+func TestRequiredFlags(t *testing.T) {
+	c := &Command{Use: "c", Run: emptyRun}
+	c.Flags().String("foo1", "", "")
+	c.MarkFlagRequired("foo1")
+	c.Flags().String("foo2", "", "")
+	c.MarkFlagRequired("foo2")
+	c.Flags().String("bar", "", "")
+
+	expected := fmt.Sprintf("required flag(s) %q, %q not set", "foo1", "foo2")
+
+	_, err := executeCommand(c)
+	got := err.Error()
+
+	if got != expected {
+		t.Errorf("Expected error: %q, got: %q", expected, got)
+	}
+}
+
+func TestPersistentRequiredFlags(t *testing.T) {
+	parent := &Command{Use: "parent", Run: emptyRun}
+	parent.PersistentFlags().String("foo1", "", "")
+	parent.MarkPersistentFlagRequired("foo1")
+	parent.PersistentFlags().String("foo2", "", "")
+	parent.MarkPersistentFlagRequired("foo2")
+	parent.Flags().String("foo3", "", "")
+
+	child := &Command{Use: "child", Run: emptyRun}
+	child.Flags().String("bar1", "", "")
+	child.MarkFlagRequired("bar1")
+	child.Flags().String("bar2", "", "")
+	child.MarkFlagRequired("bar2")
+	child.Flags().String("bar3", "", "")
+
+	parent.AddCommand(child)
+
+	expected := fmt.Sprintf("required flag(s) %q, %q, %q, %q not set", "bar1", "bar2", "foo1", "foo2")
+
+	_, err := executeCommand(parent, "child")
+	if err.Error() != expected {
+		t.Errorf("Expected %q, got %q", expected, err.Error())
+	}
+}
+
+func TestInitHelpFlagMergesFlags(t *testing.T) {
+	usage := "custom flag"
+	rootCmd := &Command{Use: "root"}
+	rootCmd.PersistentFlags().Bool("help", false, "custom flag")
+	childCmd := &Command{Use: "child"}
+	rootCmd.AddCommand(childCmd)
+
+	childCmd.InitDefaultHelpFlag()
+	got := childCmd.Flags().Lookup("help").Usage
+	if got != usage {
+		t.Errorf("Expected the help flag from the root command with usage: %v\nGot the default with usage: %v", usage, got)
+	}
+}
+
+func TestHelpCommandExecuted(t *testing.T) {
+	rootCmd := &Command{Use: "root", Long: "Long description", Run: emptyRun}
+	rootCmd.AddCommand(&Command{Use: "child", Run: emptyRun})
+
+	output, err := executeCommand(rootCmd, "help")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	checkStringContains(t, output, rootCmd.Long)
+}
+
+func TestHelpCommandExecutedOnChild(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{Use: "child", Long: "Long description", Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+
+	output, err := executeCommand(rootCmd, "help", "child")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	checkStringContains(t, output, childCmd.Long)
+}
+
+func TestSetHelpCommand(t *testing.T) {
+	c := &Command{Use: "c", Run: emptyRun}
+	c.AddCommand(&Command{Use: "empty", Run: emptyRun})
+
+	expected := "WORKS"
+	c.SetHelpCommand(&Command{
+		Use:   "help [command]",
+		Short: "Help about any command",
+		Long: `Help provides help for any command in the application.
+	Simply type ` + c.Name() + ` help [path to command] for full details.`,
+		Run: func(c *Command, _ []string) { c.Print(expected) },
+	})
+
+	got, err := executeCommand(c, "help")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	if got != expected {
+		t.Errorf("Expected to contain %q, got %q", expected, got)
+	}
+}
+
+func TestHelpFlagExecuted(t *testing.T) {
+	rootCmd := &Command{Use: "root", Long: "Long description", Run: emptyRun}
+
+	output, err := executeCommand(rootCmd, "--help")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	checkStringContains(t, output, rootCmd.Long)
+}
+
+func TestHelpFlagExecutedOnChild(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{Use: "child", Long: "Long description", Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+
+	output, err := executeCommand(rootCmd, "child", "--help")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	checkStringContains(t, output, childCmd.Long)
+}
+
+// TestHelpFlagInHelp checks,
+// if '--help' flag is shown in help for child (executing `parent help child`),
+// that has no other flags.
+// Related to https://github.com/spf13/cobra/issues/302.
+func TestHelpFlagInHelp(t *testing.T) {
+	parentCmd := &Command{Use: "parent", Run: func(*Command, []string) {}}
+
+	childCmd := &Command{Use: "child", Run: func(*Command, []string) {}}
+	parentCmd.AddCommand(childCmd)
+
+	output, err := executeCommand(parentCmd, "help", "child")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	checkStringContains(t, output, "[flags]")
+}
+
+func TestFlagsInUsage(t *testing.T) {
+	rootCmd := &Command{Use: "root", Args: NoArgs, Run: func(*Command, []string) {}}
+	output, err := executeCommand(rootCmd, "--help")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	checkStringContains(t, output, "[flags]")
+}
+
+func TestHelpExecutedOnNonRunnableChild(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{Use: "child", Long: "Long description"}
+	rootCmd.AddCommand(childCmd)
+
+	output, err := executeCommand(rootCmd, "child")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	checkStringContains(t, output, childCmd.Long)
+}
+
+func TestVersionFlagExecuted(t *testing.T) {
+	rootCmd := &Command{Use: "root", Version: "1.0.0", Run: emptyRun}
+
+	output, err := executeCommand(rootCmd, "--version", "arg1")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	checkStringContains(t, output, "root version 1.0.0")
+}
+
+func TestVersionTemplate(t *testing.T) {
+	rootCmd := &Command{Use: "root", Version: "1.0.0", Run: emptyRun}
+	rootCmd.SetVersionTemplate(`customized version: {{.Version}}`)
+
+	output, err := executeCommand(rootCmd, "--version", "arg1")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	checkStringContains(t, output, "customized version: 1.0.0")
+}
+
+func TestVersionFlagExecutedOnSubcommand(t *testing.T) {
+	rootCmd := &Command{Use: "root", Version: "1.0.0"}
+	rootCmd.AddCommand(&Command{Use: "sub", Run: emptyRun})
+
+	output, err := executeCommand(rootCmd, "--version", "sub")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	checkStringContains(t, output, "root version 1.0.0")
+}
+
+func TestVersionFlagOnlyAddedToRoot(t *testing.T) {
+	rootCmd := &Command{Use: "root", Version: "1.0.0", Run: emptyRun}
+	rootCmd.AddCommand(&Command{Use: "sub", Run: emptyRun})
+
+	_, err := executeCommand(rootCmd, "sub", "--version")
+	if err == nil {
+		t.Errorf("Expected error")
+	}
+
+	checkStringContains(t, err.Error(), "unknown flag: --version")
+}
+
+func TestVersionFlagOnlyExistsIfVersionNonEmpty(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+
+	_, err := executeCommand(rootCmd, "--version")
+	if err == nil {
+		t.Errorf("Expected error")
+	}
+	checkStringContains(t, err.Error(), "unknown flag: --version")
+}
+
+func TestUsageIsNotPrintedTwice(t *testing.T) {
+	var cmd = &Command{Use: "root"}
+	var sub = &Command{Use: "sub"}
+	cmd.AddCommand(sub)
+
+	output, _ := executeCommand(cmd, "")
+	if strings.Count(output, "Usage:") != 1 {
+		t.Error("Usage output is not printed exactly once")
+	}
+}
+
+func TestVisitParents(t *testing.T) {
+	c := &Command{Use: "app"}
+	sub := &Command{Use: "sub"}
+	dsub := &Command{Use: "dsub"}
+	sub.AddCommand(dsub)
+	c.AddCommand(sub)
+
+	total := 0
+	add := func(x *Command) {
+		total++
+	}
+	sub.VisitParents(add)
+	if total != 1 {
+		t.Errorf("Should have visited 1 parent but visited %d", total)
+	}
+
+	total = 0
+	dsub.VisitParents(add)
+	if total != 2 {
+		t.Errorf("Should have visited 2 parents but visited %d", total)
+	}
+
+	total = 0
+	c.VisitParents(add)
+	if total != 0 {
+		t.Errorf("Should have visited no parents but visited %d", total)
+	}
+}
+
+func TestSuggestions(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	timesCmd := &Command{
+		Use:        "times",
+		SuggestFor: []string{"counts"},
+		Run:        emptyRun,
+	}
+	rootCmd.AddCommand(timesCmd)
+
+	templateWithSuggestions := "Error: unknown command \"%s\" for \"root\"\n\nDid you mean this?\n\t%s\n\nRun 'root --help' for usage.\n"
+	templateWithoutSuggestions := "Error: unknown command \"%s\" for \"root\"\nRun 'root --help' for usage.\n"
+
+	tests := map[string]string{
+		"time":     "times",
+		"tiems":    "times",
+		"tims":     "times",
+		"timeS":    "times",
+		"rimes":    "times",
+		"ti":       "times",
+		"t":        "times",
+		"timely":   "times",
+		"ri":       "",
+		"timezone": "",
+		"foo":      "",
+		"counts":   "times",
+	}
+
+	for typo, suggestion := range tests {
+		for _, suggestionsDisabled := range []bool{true, false} {
+			rootCmd.DisableSuggestions = suggestionsDisabled
+
+			var expected string
+			output, _ := executeCommand(rootCmd, typo)
+
+			if suggestion == "" || suggestionsDisabled {
+				expected = fmt.Sprintf(templateWithoutSuggestions, typo)
+			} else {
+				expected = fmt.Sprintf(templateWithSuggestions, typo, suggestion)
+			}
+
+			if output != expected {
+				t.Errorf("Unexpected response.\nExpected:\n %q\nGot:\n %q\n", expected, output)
+			}
+		}
+	}
+}
+
+func TestRemoveCommand(t *testing.T) {
+	rootCmd := &Command{Use: "root", Args: NoArgs, Run: emptyRun}
+	childCmd := &Command{Use: "child", Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+	rootCmd.RemoveCommand(childCmd)
+
+	_, err := executeCommand(rootCmd, "child")
+	if err == nil {
+		t.Error("Expected error on calling removed command. Got nil.")
+	}
+}
+
+func TestReplaceCommandWithRemove(t *testing.T) {
+	childUsed := 0
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	child1Cmd := &Command{
+		Use: "child",
+		Run: func(*Command, []string) { childUsed = 1 },
+	}
+	child2Cmd := &Command{
+		Use: "child",
+		Run: func(*Command, []string) { childUsed = 2 },
+	}
+	rootCmd.AddCommand(child1Cmd)
+	rootCmd.RemoveCommand(child1Cmd)
+	rootCmd.AddCommand(child2Cmd)
+
+	output, err := executeCommand(rootCmd, "child")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	if childUsed == 1 {
+		t.Error("Removed command shouldn't be called")
+	}
+	if childUsed != 2 {
+		t.Error("Replacing command should have been called but didn't")
+	}
+}
+
+func TestDeprecatedCommand(t *testing.T) {
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	deprecatedCmd := &Command{
+		Use:        "deprecated",
+		Deprecated: "This command is deprecated",
+		Run:        emptyRun,
+	}
+	rootCmd.AddCommand(deprecatedCmd)
+
+	output, err := executeCommand(rootCmd, "deprecated")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	checkStringContains(t, output, deprecatedCmd.Deprecated)
+}
+
+func TestHooks(t *testing.T) {
+	var (
+		persPreArgs  string
+		preArgs      string
+		runArgs      string
+		postArgs     string
+		persPostArgs string
+	)
+
+	c := &Command{
+		Use: "c",
+		PersistentPreRun: func(_ *Command, args []string) {
+			persPreArgs = strings.Join(args, " ")
+		},
+		PreRun: func(_ *Command, args []string) {
+			preArgs = strings.Join(args, " ")
+		},
+		Run: func(_ *Command, args []string) {
+			runArgs = strings.Join(args, " ")
+		},
+		PostRun: func(_ *Command, args []string) {
+			postArgs = strings.Join(args, " ")
+		},
+		PersistentPostRun: func(_ *Command, args []string) {
+			persPostArgs = strings.Join(args, " ")
+		},
+	}
+
+	output, err := executeCommand(c, "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	if persPreArgs != "one two" {
+		t.Errorf("Expected persPreArgs %q, got %q", "one two", persPreArgs)
+	}
+	if preArgs != "one two" {
+		t.Errorf("Expected preArgs %q, got %q", "one two", preArgs)
+	}
+	if runArgs != "one two" {
+		t.Errorf("Expected runArgs %q, got %q", "one two", runArgs)
+	}
+	if postArgs != "one two" {
+		t.Errorf("Expected postArgs %q, got %q", "one two", postArgs)
+	}
+	if persPostArgs != "one two" {
+		t.Errorf("Expected persPostArgs %q, got %q", "one two", persPostArgs)
+	}
+}
+
+func TestPersistentHooks(t *testing.T) {
+	var (
+		parentPersPreArgs  string
+		parentPreArgs      string
+		parentRunArgs      string
+		parentPostArgs     string
+		parentPersPostArgs string
+	)
+
+	var (
+		childPersPreArgs  string
+		childPreArgs      string
+		childRunArgs      string
+		childPostArgs     string
+		childPersPostArgs string
+	)
+
+	parentCmd := &Command{
+		Use: "parent",
+		PersistentPreRun: func(_ *Command, args []string) {
+			parentPersPreArgs = strings.Join(args, " ")
+		},
+		PreRun: func(_ *Command, args []string) {
+			parentPreArgs = strings.Join(args, " ")
+		},
+		Run: func(_ *Command, args []string) {
+			parentRunArgs = strings.Join(args, " ")
+		},
+		PostRun: func(_ *Command, args []string) {
+			parentPostArgs = strings.Join(args, " ")
+		},
+		PersistentPostRun: func(_ *Command, args []string) {
+			parentPersPostArgs = strings.Join(args, " ")
+		},
+	}
+
+	childCmd := &Command{
+		Use: "child",
+		PersistentPreRun: func(_ *Command, args []string) {
+			childPersPreArgs = strings.Join(args, " ")
+		},
+		PreRun: func(_ *Command, args []string) {
+			childPreArgs = strings.Join(args, " ")
+		},
+		Run: func(_ *Command, args []string) {
+			childRunArgs = strings.Join(args, " ")
+		},
+		PostRun: func(_ *Command, args []string) {
+			childPostArgs = strings.Join(args, " ")
+		},
+		PersistentPostRun: func(_ *Command, args []string) {
+			childPersPostArgs = strings.Join(args, " ")
+		},
+	}
+	parentCmd.AddCommand(childCmd)
+
+	output, err := executeCommand(parentCmd, "child", "one", "two")
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	// TODO: This test fails, but should not.
+	// Related to https://github.com/spf13/cobra/issues/252.
+	//
+	// if parentPersPreArgs != "one two" {
+	// 	t.Errorf("Expected parentPersPreArgs %q, got %q", "one two", parentPersPreArgs)
+	// }
+	if parentPreArgs != "" {
+		t.Errorf("Expected blank parentPreArgs, got %q", parentPreArgs)
+	}
+	if parentRunArgs != "" {
+		t.Errorf("Expected blank parentRunArgs, got %q", parentRunArgs)
+	}
+	if parentPostArgs != "" {
+		t.Errorf("Expected blank parentPostArgs, got %q", parentPostArgs)
+	}
+	// TODO: This test fails, but should not.
+	// Related to https://github.com/spf13/cobra/issues/252.
+	//
+	// if parentPersPostArgs != "one two" {
+	// 	t.Errorf("Expected parentPersPostArgs %q, got %q", "one two", parentPersPostArgs)
+	// }
+
+	if childPersPreArgs != "one two" {
+		t.Errorf("Expected childPersPreArgs %q, got %q", "one two", childPersPreArgs)
+	}
+	if childPreArgs != "one two" {
+		t.Errorf("Expected childPreArgs %q, got %q", "one two", childPreArgs)
+	}
+	if childRunArgs != "one two" {
+		t.Errorf("Expected childRunArgs %q, got %q", "one two", childRunArgs)
+	}
+	if childPostArgs != "one two" {
+		t.Errorf("Expected childPostArgs %q, got %q", "one two", childPostArgs)
+	}
+	if childPersPostArgs != "one two" {
+		t.Errorf("Expected childPersPostArgs %q, got %q", "one two", childPersPostArgs)
+	}
+}
+
+// Related to https://github.com/spf13/cobra/issues/521.
+func TestGlobalNormFuncPropagation(t *testing.T) {
+	normFunc := func(f *pflag.FlagSet, name string) pflag.NormalizedName {
+		return pflag.NormalizedName(name)
+	}
+
+	rootCmd := &Command{Use: "root", Run: emptyRun}
+	childCmd := &Command{Use: "child", Run: emptyRun}
+	rootCmd.AddCommand(childCmd)
+
+	rootCmd.SetGlobalNormalizationFunc(normFunc)
+	if reflect.ValueOf(normFunc).Pointer() != reflect.ValueOf(rootCmd.GlobalNormalizationFunc()).Pointer() {
+		t.Error("rootCmd seems to have a wrong normalization function")
+	}
+
+	if reflect.ValueOf(normFunc).Pointer() != reflect.ValueOf(childCmd.GlobalNormalizationFunc()).Pointer() {
+		t.Error("childCmd should have had the normalization function of rootCmd")
+	}
+}
+
+// Related to https://github.com/spf13/cobra/issues/521.
+func TestNormPassedOnLocal(t *testing.T) {
+	toUpper := func(f *pflag.FlagSet, name string) pflag.NormalizedName {
+		return pflag.NormalizedName(strings.ToUpper(name))
+	}
+
+	c := &Command{}
+	c.Flags().Bool("flagname", true, "this is a dummy flag")
+	c.SetGlobalNormalizationFunc(toUpper)
+	if c.LocalFlags().Lookup("flagname") != c.LocalFlags().Lookup("FLAGNAME") {
+		t.Error("Normalization function should be passed on to Local flag set")
+	}
+}
+
+// Related to https://github.com/spf13/cobra/issues/521.
+func TestNormPassedOnInherited(t *testing.T) {
+	toUpper := func(f *pflag.FlagSet, name string) pflag.NormalizedName {
+		return pflag.NormalizedName(strings.ToUpper(name))
+	}
+
+	c := &Command{}
+	c.SetGlobalNormalizationFunc(toUpper)
+
+	child1 := &Command{}
+	c.AddCommand(child1)
+
+	c.PersistentFlags().Bool("flagname", true, "")
+
+	child2 := &Command{}
+	c.AddCommand(child2)
+
+	inherited := child1.InheritedFlags()
+	if inherited.Lookup("flagname") == nil || inherited.Lookup("flagname") != inherited.Lookup("FLAGNAME") {
+		t.Error("Normalization function should be passed on to inherited flag set in command added before flag")
+	}
+
+	inherited = child2.InheritedFlags()
+	if inherited.Lookup("flagname") == nil || inherited.Lookup("flagname") != inherited.Lookup("FLAGNAME") {
+		t.Error("Normalization function should be passed on to inherited flag set in command added after flag")
+	}
+}
+
+// Related to https://github.com/spf13/cobra/issues/521.
+func TestConsistentNormalizedName(t *testing.T) {
+	toUpper := func(f *pflag.FlagSet, name string) pflag.NormalizedName {
+		return pflag.NormalizedName(strings.ToUpper(name))
+	}
+	n := func(f *pflag.FlagSet, name string) pflag.NormalizedName {
+		return pflag.NormalizedName(name)
+	}
+
+	c := &Command{}
+	c.Flags().Bool("flagname", true, "")
+	c.SetGlobalNormalizationFunc(toUpper)
+	c.SetGlobalNormalizationFunc(n)
+
+	if c.LocalFlags().Lookup("flagname") == c.LocalFlags().Lookup("FLAGNAME") {
+		t.Error("Normalizing flag names should not result in duplicate flags")
+	}
+}
+
+func TestFlagOnPflagCommandLine(t *testing.T) {
+	flagName := "flagOnCommandLine"
+	pflag.String(flagName, "", "about my flag")
+
+	c := &Command{Use: "c", Run: emptyRun}
+	c.AddCommand(&Command{Use: "child", Run: emptyRun})
+
+	output, _ := executeCommand(c, "--help")
+	checkStringContains(t, output, flagName)
+
+	resetCommandLineFlagSet()
+}
+
+// TestHiddenCommandExecutes checks,
+// if hidden commands run as intended.
+func TestHiddenCommandExecutes(t *testing.T) {
+	executed := false
+	c := &Command{
+		Use:    "c",
+		Hidden: true,
+		Run:    func(*Command, []string) { executed = true },
+	}
+
+	output, err := executeCommand(c)
+	if output != "" {
+		t.Errorf("Unexpected output: %v", output)
+	}
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	if !executed {
+		t.Error("Hidden command should have been executed")
+	}
+}
+
+// test to ensure hidden commands do not show up in usage/help text
+func TestHiddenCommandIsHidden(t *testing.T) {
+	c := &Command{Use: "c", Hidden: true, Run: emptyRun}
+	if c.IsAvailableCommand() {
+		t.Errorf("Hidden command should be unavailable")
+	}
+}
+
+func TestCommandsAreSorted(t *testing.T) {
+	EnableCommandSorting = true
+
+	originalNames := []string{"middle", "zlast", "afirst"}
+	expectedNames := []string{"afirst", "middle", "zlast"}
+
+	var rootCmd = &Command{Use: "root"}
+
+	for _, name := range originalNames {
+		rootCmd.AddCommand(&Command{Use: name})
+	}
+
+	for i, c := range rootCmd.Commands() {
+		got := c.Name()
+		if expectedNames[i] != got {
+			t.Errorf("Expected: %s, got: %s", expectedNames[i], got)
+		}
+	}
+
+	EnableCommandSorting = true
+}
+
+func TestEnableCommandSortingIsDisabled(t *testing.T) {
+	EnableCommandSorting = false
+
+	originalNames := []string{"middle", "zlast", "afirst"}
+
+	var rootCmd = &Command{Use: "root"}
+
+	for _, name := range originalNames {
+		rootCmd.AddCommand(&Command{Use: name})
+	}
+
+	for i, c := range rootCmd.Commands() {
+		got := c.Name()
+		if originalNames[i] != got {
+			t.Errorf("expected: %s, got: %s", originalNames[i], got)
+		}
+	}
+
+	EnableCommandSorting = true
+}
+
+func TestSetOutput(t *testing.T) {
+	c := &Command{}
+	c.SetOutput(nil)
+	if out := c.OutOrStdout(); out != os.Stdout {
+		t.Errorf("Expected setting output to nil to revert back to stdout")
+	}
+}
+
+func TestFlagErrorFunc(t *testing.T) {
+	c := &Command{Use: "c", Run: emptyRun}
+
+	expectedFmt := "This is expected: %v"
+	c.SetFlagErrorFunc(func(_ *Command, err error) error {
+		return fmt.Errorf(expectedFmt, err)
+	})
+
+	_, err := executeCommand(c, "--unknown-flag")
+
+	got := err.Error()
+	expected := fmt.Sprintf(expectedFmt, "unknown flag: --unknown-flag")
+	if got != expected {
+		t.Errorf("Expected %v, got %v", expected, got)
+	}
+}
+
+// TestSortedFlags checks,
+// if cmd.LocalFlags() is unsorted when cmd.Flags().SortFlags set to false.
+// Related to https://github.com/spf13/cobra/issues/404.
+func TestSortedFlags(t *testing.T) {
+	c := &Command{}
+	c.Flags().SortFlags = false
+	names := []string{"C", "B", "A", "D"}
+	for _, name := range names {
+		c.Flags().Bool(name, false, "")
+	}
+
+	i := 0
+	c.LocalFlags().VisitAll(func(f *pflag.Flag) {
+		if i == len(names) {
+			return
+		}
+		if stringInSlice(f.Name, names) {
+			if names[i] != f.Name {
+				t.Errorf("Incorrect order. Expected %v, got %v", names[i], f.Name)
+			}
+			i++
+		}
+	})
+}
+
+// TestMergeCommandLineToFlags checks,
+// if pflag.CommandLine is correctly merged to c.Flags() after first call
+// of c.mergePersistentFlags.
+// Related to https://github.com/spf13/cobra/issues/443.
+func TestMergeCommandLineToFlags(t *testing.T) {
+	pflag.Bool("boolflag", false, "")
+	c := &Command{Use: "c", Run: emptyRun}
+	c.mergePersistentFlags()
+	if c.Flags().Lookup("boolflag") == nil {
+		t.Fatal("Expecting to have flag from CommandLine in c.Flags()")
+	}
+
+	resetCommandLineFlagSet()
+}
+
+// TestUseDeprecatedFlags checks,
+// if cobra.Execute() prints a message, if a deprecated flag is used.
+// Related to https://github.com/spf13/cobra/issues/463.
+func TestUseDeprecatedFlags(t *testing.T) {
+	c := &Command{Use: "c", Run: emptyRun}
+	c.Flags().BoolP("deprecated", "d", false, "deprecated flag")
+	c.Flags().MarkDeprecated("deprecated", "This flag is deprecated")
+
+	output, err := executeCommand(c, "c", "-d")
+	if err != nil {
+		t.Error("Unexpected error:", err)
+	}
+	checkStringContains(t, output, "This flag is deprecated")
+}
+
+func TestTraverseWithParentFlags(t *testing.T) {
+	rootCmd := &Command{Use: "root", TraverseChildren: true}
+	rootCmd.Flags().String("str", "", "")
+	rootCmd.Flags().BoolP("bool", "b", false, "")
+
+	childCmd := &Command{Use: "child"}
+	childCmd.Flags().Int("int", -1, "")
+
+	rootCmd.AddCommand(childCmd)
+
+	c, args, err := rootCmd.Traverse([]string{"-b", "--str", "ok", "child", "--int"})
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if len(args) != 1 && args[0] != "--add" {
+		t.Errorf("Wrong args: %v", args)
+	}
+	if c.Name() != childCmd.Name() {
+		t.Errorf("Expected command: %q, got: %q", childCmd.Name(), c.Name())
+	}
+}
+
+func TestTraverseNoParentFlags(t *testing.T) {
+	rootCmd := &Command{Use: "root", TraverseChildren: true}
+	rootCmd.Flags().String("foo", "", "foo things")
+
+	childCmd := &Command{Use: "child"}
+	childCmd.Flags().String("str", "", "")
+	rootCmd.AddCommand(childCmd)
+
+	c, args, err := rootCmd.Traverse([]string{"child"})
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if len(args) != 0 {
+		t.Errorf("Wrong args %v", args)
+	}
+	if c.Name() != childCmd.Name() {
+		t.Errorf("Expected command: %q, got: %q", childCmd.Name(), c.Name())
+	}
+}
+
+func TestTraverseWithBadParentFlags(t *testing.T) {
+	rootCmd := &Command{Use: "root", TraverseChildren: true}
+
+	childCmd := &Command{Use: "child"}
+	childCmd.Flags().String("str", "", "")
+	rootCmd.AddCommand(childCmd)
+
+	expected := "unknown flag: --str"
+
+	c, _, err := rootCmd.Traverse([]string{"--str", "ok", "child"})
+	if err == nil || !strings.Contains(err.Error(), expected) {
+		t.Errorf("Expected error, %q, got %q", expected, err)
+	}
+	if c != nil {
+		t.Errorf("Expected nil command")
+	}
+}
+
+func TestTraverseWithBadChildFlag(t *testing.T) {
+	rootCmd := &Command{Use: "root", TraverseChildren: true}
+	rootCmd.Flags().String("str", "", "")
+
+	childCmd := &Command{Use: "child"}
+	rootCmd.AddCommand(childCmd)
+
+	// Expect no error because the last commands args shouldn't be parsed in
+	// Traverse.
+	c, args, err := rootCmd.Traverse([]string{"child", "--str"})
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if len(args) != 1 && args[0] != "--str" {
+		t.Errorf("Wrong args: %v", args)
+	}
+	if c.Name() != childCmd.Name() {
+		t.Errorf("Expected command %q, got: %q", childCmd.Name(), c.Name())
+	}
+}
+
+func TestTraverseWithTwoSubcommands(t *testing.T) {
+	rootCmd := &Command{Use: "root", TraverseChildren: true}
+
+	subCmd := &Command{Use: "sub", TraverseChildren: true}
+	rootCmd.AddCommand(subCmd)
+
+	subsubCmd := &Command{
+		Use: "subsub",
+	}
+	subCmd.AddCommand(subsubCmd)
+
+	c, _, err := rootCmd.Traverse([]string{"sub", "subsub"})
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+	if c.Name() != subsubCmd.Name() {
+		t.Fatalf("Expected command: %q, got %q", subsubCmd.Name(), c.Name())
+	}
+}
+
+// TestUpdateName checks if c.Name() updates on changed c.Use.
+// Related to https://github.com/spf13/cobra/pull/422#discussion_r143918343.
+func TestUpdateName(t *testing.T) {
+	c := &Command{Use: "name xyz"}
+	originalName := c.Name()
+
+	c.Use = "changedName abc"
+	if originalName == c.Name() || c.Name() != "changedName" {
+		t.Error("c.Name() should be updated on changed c.Use")
+	}
+}
+
+type calledAsTestcase struct {
+	args []string
+	call string
+	want string
+	epm  bool
+	tc   bool
+}
+
+func (tc *calledAsTestcase) test(t *testing.T) {
+	defer func(ov bool) { EnablePrefixMatching = ov }(EnablePrefixMatching)
+	EnablePrefixMatching = tc.epm
+
+	var called *Command
+	run := func(c *Command, _ []string) { t.Logf("called: %q", c.Name()); called = c }
+
+	parent := &Command{Use: "parent", Run: run}
+	child1 := &Command{Use: "child1", Run: run, Aliases: []string{"this"}}
+	child2 := &Command{Use: "child2", Run: run, Aliases: []string{"that"}}
+
+	parent.AddCommand(child1)
+	parent.AddCommand(child2)
+	parent.SetArgs(tc.args)
+
+	output := new(bytes.Buffer)
+	parent.SetOutput(output)
+
+	parent.Execute()
+
+	if called == nil {
+		if tc.call != "" {
+			t.Errorf("missing expected call to command: %s", tc.call)
+		}
+		return
+	}
+
+	if called.Name() != tc.call {
+		t.Errorf("called command == %q; Wanted %q", called.Name(), tc.call)
+	} else if got := called.CalledAs(); got != tc.want {
+		t.Errorf("%s.CalledAs() == %q; Wanted: %q", tc.call, got, tc.want)
+	}
+}
+
+func TestCalledAs(t *testing.T) {
+	tests := map[string]calledAsTestcase{
+		"find/no-args":            {nil, "parent", "parent", false, false},
+		"find/real-name":          {[]string{"child1"}, "child1", "child1", false, false},
+		"find/full-alias":         {[]string{"that"}, "child2", "that", false, false},
+		"find/part-no-prefix":     {[]string{"thi"}, "", "", false, false},
+		"find/part-alias":         {[]string{"thi"}, "child1", "this", true, false},
+		"find/conflict":           {[]string{"th"}, "", "", true, false},
+		"traverse/no-args":        {nil, "parent", "parent", false, true},
+		"traverse/real-name":      {[]string{"child1"}, "child1", "child1", false, true},
+		"traverse/full-alias":     {[]string{"that"}, "child2", "that", false, true},
+		"traverse/part-no-prefix": {[]string{"thi"}, "", "", false, true},
+		"traverse/part-alias":     {[]string{"thi"}, "child1", "this", true, true},
+		"traverse/conflict":       {[]string{"th"}, "", "", true, true},
+	}
+
+	for name, tc := range tests {
+		t.Run(name, tc.test)
+	}
+}
+
+func TestFParseErrWhitelistBackwardCompatibility(t *testing.T) {
+	c := &Command{Use: "c", Run: emptyRun}
+	c.Flags().BoolP("boola", "a", false, "a boolean flag")
+
+	output, err := executeCommand(c, "c", "-a", "--unknown", "flag")
+	if err == nil {
+		t.Error("expected unknown flag error")
+	}
+	checkStringContains(t, output, "unknown flag: --unknown")
+}
+
+func TestFParseErrWhitelistSameCommand(t *testing.T) {
+	c := &Command{
+		Use: "c",
+		Run: emptyRun,
+		FParseErrWhitelist: FParseErrWhitelist{
+			UnknownFlags: true,
+		},
+	}
+	c.Flags().BoolP("boola", "a", false, "a boolean flag")
+
+	_, err := executeCommand(c, "c", "-a", "--unknown", "flag")
+	if err != nil {
+		t.Error("unexpected error: ", err)
+	}
+}
+
+func TestFParseErrWhitelistParentCommand(t *testing.T) {
+	root := &Command{
+		Use: "root",
+		Run: emptyRun,
+		FParseErrWhitelist: FParseErrWhitelist{
+			UnknownFlags: true,
+		},
+	}
+
+	c := &Command{
+		Use: "child",
+		Run: emptyRun,
+	}
+	c.Flags().BoolP("boola", "a", false, "a boolean flag")
+
+	root.AddCommand(c)
+
+	output, err := executeCommand(root, "child", "-a", "--unknown", "flag")
+	if err == nil {
+		t.Error("expected unknown flag error")
+	}
+	checkStringContains(t, output, "unknown flag: --unknown")
+}
+
+func TestFParseErrWhitelistChildCommand(t *testing.T) {
+	root := &Command{
+		Use: "root",
+		Run: emptyRun,
+	}
+
+	c := &Command{
+		Use: "child",
+		Run: emptyRun,
+		FParseErrWhitelist: FParseErrWhitelist{
+			UnknownFlags: true,
+		},
+	}
+	c.Flags().BoolP("boola", "a", false, "a boolean flag")
+
+	root.AddCommand(c)
+
+	_, err := executeCommand(root, "child", "-a", "--unknown", "flag")
+	if err != nil {
+		t.Error("unexpected error: ", err.Error())
+	}
+}
+
+func TestFParseErrWhitelistSiblingCommand(t *testing.T) {
+	root := &Command{
+		Use: "root",
+		Run: emptyRun,
+	}
+
+	c := &Command{
+		Use: "child",
+		Run: emptyRun,
+		FParseErrWhitelist: FParseErrWhitelist{
+			UnknownFlags: true,
+		},
+	}
+	c.Flags().BoolP("boola", "a", false, "a boolean flag")
+
+	s := &Command{
+		Use: "sibling",
+		Run: emptyRun,
+	}
+	s.Flags().BoolP("boolb", "b", false, "a boolean flag")
+
+	root.AddCommand(c)
+	root.AddCommand(s)
+
+	output, err := executeCommand(root, "sibling", "-b", "--unknown", "flag")
+	if err == nil {
+		t.Error("expected unknown flag error")
+	}
+	checkStringContains(t, output, "unknown flag: --unknown")
+}

vendor/github.com/spf13/cobra/command_win.go

@@ -0,0 +1,20 @@
+// +build windows
+
+package cobra
+
+import (
+	"os"
+	"time"
+
+	"github.com/inconshreveable/mousetrap"
+)
+
+var preExecHookFn = preExecHook
+
+func preExecHook(c *Command) {
+	if MousetrapHelpText != "" && mousetrap.StartedByExplorer() {
+		c.Print(MousetrapHelpText)
+		time.Sleep(5 * time.Second)
+		os.Exit(1)
+	}
+}

vendor/github.com/spf13/cobra/doc/cmd_test.go

@@ -0,0 +1,86 @@
+package doc
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/spf13/cobra"
+)
+
+func emptyRun(*cobra.Command, []string) {}
+
+func init() {
+	rootCmd.PersistentFlags().StringP("rootflag", "r", "two", "")
+	rootCmd.PersistentFlags().StringP("strtwo", "t", "two", "help message for parent flag strtwo")
+
+	echoCmd.PersistentFlags().StringP("strone", "s", "one", "help message for flag strone")
+	echoCmd.PersistentFlags().BoolP("persistentbool", "p", false, "help message for flag persistentbool")
+	echoCmd.Flags().IntP("intone", "i", 123, "help message for flag intone")
+	echoCmd.Flags().BoolP("boolone", "b", true, "help message for flag boolone")
+
+	timesCmd.PersistentFlags().StringP("strtwo", "t", "2", "help message for child flag strtwo")
+	timesCmd.Flags().IntP("inttwo", "j", 234, "help message for flag inttwo")
+	timesCmd.Flags().BoolP("booltwo", "c", false, "help message for flag booltwo")
+
+	printCmd.PersistentFlags().StringP("strthree", "s", "three", "help message for flag strthree")
+	printCmd.Flags().IntP("intthree", "i", 345, "help message for flag intthree")
+	printCmd.Flags().BoolP("boolthree", "b", true, "help message for flag boolthree")
+
+	echoCmd.AddCommand(timesCmd, echoSubCmd, deprecatedCmd)
+	rootCmd.AddCommand(printCmd, echoCmd)
+}
+
+var rootCmd = &cobra.Command{
+	Use:   "root",
+	Short: "Root short description",
+	Long:  "Root long description",
+	Run:   emptyRun,
+}
+
+var echoCmd = &cobra.Command{
+	Use:     "echo [string to echo]",
+	Aliases: []string{"say"},
+	Short:   "Echo anything to the screen",
+	Long:    "an utterly useless command for testing",
+	Example: "Just run cobra-test echo",
+}
+
+var echoSubCmd = &cobra.Command{
+	Use:   "echosub [string to print]",
+	Short: "second sub command for echo",
+	Long:  "an absolutely utterly useless command for testing gendocs!.",
+	Run:   emptyRun,
+}
+
+var timesCmd = &cobra.Command{
+	Use:        "times [# times] [string to echo]",
+	SuggestFor: []string{"counts"},
+	Short:      "Echo anything to the screen more times",
+	Long:       `a slightly useless command for testing.`,
+	Run:        emptyRun,
+}
+
+var deprecatedCmd = &cobra.Command{
+	Use:        "deprecated [can't do anything here]",
+	Short:      "A command which is deprecated",
+	Long:       `an absolutely utterly useless command for testing deprecation!.`,
+	Deprecated: "Please use echo instead",
+}
+
+var printCmd = &cobra.Command{
+	Use:   "print [string to print]",
+	Short: "Print anything to the screen",
+	Long:  `an absolutely utterly useless command for testing.`,
+}
+
+func checkStringContains(t *testing.T, got, expected string) {
+	if !strings.Contains(got, expected) {
+		t.Errorf("Expected to contain: \n %v\nGot:\n %v\n", expected, got)
+	}
+}
+
+func checkStringOmits(t *testing.T, got, expected string) {
+	if strings.Contains(got, expected) {
+		t.Errorf("Expected to not contain: \n %v\nGot: %v", expected, got)
+	}
+}

vendor/github.com/spf13/cobra/doc/man_docs.go

@@ -0,0 +1,236 @@
+// Copyright 2015 Red Hat Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/cpuguy83/go-md2man/md2man"
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+)
+
+// GenManTree will generate a man page for this command and all descendants
+// in the directory given. The header may be nil. This function may not work
+// correctly if your command names have `-` in them. If you have `cmd` with two
+// subcmds, `sub` and `sub-third`, and `sub` has a subcommand called `third`
+// it is undefined which help output will be in the file `cmd-sub-third.1`.
+func GenManTree(cmd *cobra.Command, header *GenManHeader, dir string) error {
+	return GenManTreeFromOpts(cmd, GenManTreeOptions{
+		Header:           header,
+		Path:             dir,
+		CommandSeparator: "-",
+	})
+}
+
+// GenManTreeFromOpts generates a man page for the command and all descendants.
+// The pages are written to the opts.Path directory.
+func GenManTreeFromOpts(cmd *cobra.Command, opts GenManTreeOptions) error {
+	header := opts.Header
+	if header == nil {
+		header = &GenManHeader{}
+	}
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		if err := GenManTreeFromOpts(c, opts); err != nil {
+			return err
+		}
+	}
+	section := "1"
+	if header.Section != "" {
+		section = header.Section
+	}
+
+	separator := "_"
+	if opts.CommandSeparator != "" {
+		separator = opts.CommandSeparator
+	}
+	basename := strings.Replace(cmd.CommandPath(), " ", separator, -1)
+	filename := filepath.Join(opts.Path, basename+"."+section)
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	headerCopy := *header
+	return GenMan(cmd, &headerCopy, f)
+}
+
+// GenManTreeOptions is the options for generating the man pages.
+// Used only in GenManTreeFromOpts.
+type GenManTreeOptions struct {
+	Header           *GenManHeader
+	Path             string
+	CommandSeparator string
+}
+
+// GenManHeader is a lot like the .TH header at the start of man pages. These
+// include the title, section, date, source, and manual. We will use the
+// current time if Date if unset and will use "Auto generated by spf13/cobra"
+// if the Source is unset.
+type GenManHeader struct {
+	Title   string
+	Section string
+	Date    *time.Time
+	date    string
+	Source  string
+	Manual  string
+}
+
+// GenMan will generate a man page for the given command and write it to
+// w. The header argument may be nil, however obviously w may not.
+func GenMan(cmd *cobra.Command, header *GenManHeader, w io.Writer) error {
+	if header == nil {
+		header = &GenManHeader{}
+	}
+	fillHeader(header, cmd.CommandPath())
+
+	b := genMan(cmd, header)
+	_, err := w.Write(md2man.Render(b))
+	return err
+}
+
+func fillHeader(header *GenManHeader, name string) {
+	if header.Title == "" {
+		header.Title = strings.ToUpper(strings.Replace(name, " ", "\\-", -1))
+	}
+	if header.Section == "" {
+		header.Section = "1"
+	}
+	if header.Date == nil {
+		now := time.Now()
+		header.Date = &now
+	}
+	header.date = (*header.Date).Format("Jan 2006")
+	if header.Source == "" {
+		header.Source = "Auto generated by spf13/cobra"
+	}
+}
+
+func manPreamble(buf *bytes.Buffer, header *GenManHeader, cmd *cobra.Command, dashedName string) {
+	description := cmd.Long
+	if len(description) == 0 {
+		description = cmd.Short
+	}
+
+	buf.WriteString(fmt.Sprintf(`%% %s(%s)%s
+%% %s
+%% %s
+# NAME
+`, header.Title, header.Section, header.date, header.Source, header.Manual))
+	buf.WriteString(fmt.Sprintf("%s \\- %s\n\n", dashedName, cmd.Short))
+	buf.WriteString("# SYNOPSIS\n")
+	buf.WriteString(fmt.Sprintf("**%s**\n\n", cmd.UseLine()))
+	buf.WriteString("# DESCRIPTION\n")
+	buf.WriteString(description + "\n\n")
+}
+
+func manPrintFlags(buf *bytes.Buffer, flags *pflag.FlagSet) {
+	flags.VisitAll(func(flag *pflag.Flag) {
+		if len(flag.Deprecated) > 0 || flag.Hidden {
+			return
+		}
+		format := ""
+		if len(flag.Shorthand) > 0 && len(flag.ShorthandDeprecated) == 0 {
+			format = fmt.Sprintf("**-%s**, **--%s**", flag.Shorthand, flag.Name)
+		} else {
+			format = fmt.Sprintf("**--%s**", flag.Name)
+		}
+		if len(flag.NoOptDefVal) > 0 {
+			format += "["
+		}
+		if flag.Value.Type() == "string" {
+			// put quotes on the value
+			format += "=%q"
+		} else {
+			format += "=%s"
+		}
+		if len(flag.NoOptDefVal) > 0 {
+			format += "]"
+		}
+		format += "\n\t%s\n\n"
+		buf.WriteString(fmt.Sprintf(format, flag.DefValue, flag.Usage))
+	})
+}
+
+func manPrintOptions(buf *bytes.Buffer, command *cobra.Command) {
+	flags := command.NonInheritedFlags()
+	if flags.HasFlags() {
+		buf.WriteString("# OPTIONS\n")
+		manPrintFlags(buf, flags)
+		buf.WriteString("\n")
+	}
+	flags = command.InheritedFlags()
+	if flags.HasFlags() {
+		buf.WriteString("# OPTIONS INHERITED FROM PARENT COMMANDS\n")
+		manPrintFlags(buf, flags)
+		buf.WriteString("\n")
+	}
+}
+
+func genMan(cmd *cobra.Command, header *GenManHeader) []byte {
+	cmd.InitDefaultHelpCmd()
+	cmd.InitDefaultHelpFlag()
+
+	// something like `rootcmd-subcmd1-subcmd2`
+	dashCommandName := strings.Replace(cmd.CommandPath(), " ", "-", -1)
+
+	buf := new(bytes.Buffer)
+
+	manPreamble(buf, header, cmd, dashCommandName)
+	manPrintOptions(buf, cmd)
+	if len(cmd.Example) > 0 {
+		buf.WriteString("# EXAMPLE\n")
+		buf.WriteString(fmt.Sprintf("```\n%s\n```\n", cmd.Example))
+	}
+	if hasSeeAlso(cmd) {
+		buf.WriteString("# SEE ALSO\n")
+		seealsos := make([]string, 0)
+		if cmd.HasParent() {
+			parentPath := cmd.Parent().CommandPath()
+			dashParentPath := strings.Replace(parentPath, " ", "-", -1)
+			seealso := fmt.Sprintf("**%s(%s)**", dashParentPath, header.Section)
+			seealsos = append(seealsos, seealso)
+			cmd.VisitParents(func(c *cobra.Command) {
+				if c.DisableAutoGenTag {
+					cmd.DisableAutoGenTag = c.DisableAutoGenTag
+				}
+			})
+		}
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+		for _, c := range children {
+			if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+				continue
+			}
+			seealso := fmt.Sprintf("**%s-%s(%s)**", dashCommandName, c.Name(), header.Section)
+			seealsos = append(seealsos, seealso)
+		}
+		buf.WriteString(strings.Join(seealsos, ", ") + "\n")
+	}
+	if !cmd.DisableAutoGenTag {
+		buf.WriteString(fmt.Sprintf("# HISTORY\n%s Auto generated by spf13/cobra\n", header.Date.Format("2-Jan-2006")))
+	}
+	return buf.Bytes()
+}

vendor/github.com/spf13/cobra/doc/man_docs.md

@@ -0,0 +1,31 @@
+# Generating Man Pages For Your Own cobra.Command
+
+Generating man pages from a cobra command is incredibly easy. An example is as follows:
+
+```go
+package main
+
+import (
+	"log"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	cmd := &cobra.Command{
+		Use:   "test",
+		Short: "my test program",
+	}
+	header := &doc.GenManHeader{
+		Title: "MINE",
+		Section: "3",
+	}
+	err := doc.GenManTree(cmd, header, "/tmp")
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+```
+
+That will get you a man page `/tmp/test.3`

vendor/github.com/spf13/cobra/doc/man_docs_test.go

@@ -0,0 +1,177 @@
+package doc
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/spf13/cobra"
+)
+
+func translate(in string) string {
+	return strings.Replace(in, "-", "\\-", -1)
+}
+
+func TestGenManDoc(t *testing.T) {
+	header := &GenManHeader{
+		Title:   "Project",
+		Section: "2",
+	}
+
+	// We generate on a subcommand so we have both subcommands and parents
+	buf := new(bytes.Buffer)
+	if err := GenMan(echoCmd, header, buf); err != nil {
+		t.Fatal(err)
+	}
+	output := buf.String()
+
+	// Make sure parent has - in CommandPath() in SEE ALSO:
+	parentPath := echoCmd.Parent().CommandPath()
+	dashParentPath := strings.Replace(parentPath, " ", "-", -1)
+	expected := translate(dashParentPath)
+	expected = expected + "(" + header.Section + ")"
+	checkStringContains(t, output, expected)
+
+	checkStringContains(t, output, translate(echoCmd.Name()))
+	checkStringContains(t, output, translate(echoCmd.Name()))
+	checkStringContains(t, output, "boolone")
+	checkStringContains(t, output, "rootflag")
+	checkStringContains(t, output, translate(rootCmd.Name()))
+	checkStringContains(t, output, translate(echoSubCmd.Name()))
+	checkStringOmits(t, output, translate(deprecatedCmd.Name()))
+	checkStringContains(t, output, translate("Auto generated"))
+}
+
+func TestGenManNoGenTag(t *testing.T) {
+	echoCmd.DisableAutoGenTag = true
+	defer func() { echoCmd.DisableAutoGenTag = false }()
+
+	header := &GenManHeader{
+		Title:   "Project",
+		Section: "2",
+	}
+
+	// We generate on a subcommand so we have both subcommands and parents
+	buf := new(bytes.Buffer)
+	if err := GenMan(echoCmd, header, buf); err != nil {
+		t.Fatal(err)
+	}
+	output := buf.String()
+
+	unexpected := translate("#HISTORY")
+	checkStringOmits(t, output, unexpected)
+}
+
+func TestGenManSeeAlso(t *testing.T) {
+	rootCmd := &cobra.Command{Use: "root", Run: emptyRun}
+	aCmd := &cobra.Command{Use: "aaa", Run: emptyRun, Hidden: true} // #229
+	bCmd := &cobra.Command{Use: "bbb", Run: emptyRun}
+	cCmd := &cobra.Command{Use: "ccc", Run: emptyRun}
+	rootCmd.AddCommand(aCmd, bCmd, cCmd)
+
+	buf := new(bytes.Buffer)
+	header := &GenManHeader{}
+	if err := GenMan(rootCmd, header, buf); err != nil {
+		t.Fatal(err)
+	}
+	scanner := bufio.NewScanner(buf)
+
+	if err := assertLineFound(scanner, ".SH SEE ALSO"); err != nil {
+		t.Fatalf("Couldn't find SEE ALSO section header: %v", err)
+	}
+	if err := assertNextLineEquals(scanner, ".PP"); err != nil {
+		t.Fatalf("First line after SEE ALSO wasn't break-indent: %v", err)
+	}
+	if err := assertNextLineEquals(scanner, `\fBroot\-bbb(1)\fP, \fBroot\-ccc(1)\fP`); err != nil {
+		t.Fatalf("Second line after SEE ALSO wasn't correct: %v", err)
+	}
+}
+
+func TestManPrintFlagsHidesShortDeperecated(t *testing.T) {
+	c := &cobra.Command{}
+	c.Flags().StringP("foo", "f", "default", "Foo flag")
+	c.Flags().MarkShorthandDeprecated("foo", "don't use it no more")
+
+	buf := new(bytes.Buffer)
+	manPrintFlags(buf, c.Flags())
+
+	got := buf.String()
+	expected := "**--foo**=\"default\"\n\tFoo flag\n\n"
+	if got != expected {
+		t.Errorf("Expected %v, got %v", expected, got)
+	}
+}
+
+func TestGenManTree(t *testing.T) {
+	c := &cobra.Command{Use: "do [OPTIONS] arg1 arg2"}
+	header := &GenManHeader{Section: "2"}
+	tmpdir, err := ioutil.TempDir("", "test-gen-man-tree")
+	if err != nil {
+		t.Fatalf("Failed to create tmpdir: %s", err.Error())
+	}
+	defer os.RemoveAll(tmpdir)
+
+	if err := GenManTree(c, header, tmpdir); err != nil {
+		t.Fatalf("GenManTree failed: %s", err.Error())
+	}
+
+	if _, err := os.Stat(filepath.Join(tmpdir, "do.2")); err != nil {
+		t.Fatalf("Expected file 'do.2' to exist")
+	}
+
+	if header.Title != "" {
+		t.Fatalf("Expected header.Title to be unmodified")
+	}
+}
+
+func assertLineFound(scanner *bufio.Scanner, expectedLine string) error {
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line == expectedLine {
+			return nil
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return fmt.Errorf("scan failed: %s", err)
+	}
+
+	return fmt.Errorf("hit EOF before finding %v", expectedLine)
+}
+
+func assertNextLineEquals(scanner *bufio.Scanner, expectedLine string) error {
+	if scanner.Scan() {
+		line := scanner.Text()
+		if line == expectedLine {
+			return nil
+		}
+		return fmt.Errorf("got %v, not %v", line, expectedLine)
+	}
+
+	if err := scanner.Err(); err != nil {
+		return fmt.Errorf("scan failed: %v", err)
+	}
+
+	return fmt.Errorf("hit EOF before finding %v", expectedLine)
+}
+
+func BenchmarkGenManToFile(b *testing.B) {
+	file, err := ioutil.TempFile("", "")
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer os.Remove(file.Name())
+	defer file.Close()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		if err := GenMan(rootCmd, nil, file); err != nil {
+			b.Fatal(err)
+		}
+	}
+}

vendor/github.com/spf13/cobra/doc/man_examples_test.go

@@ -0,0 +1,35 @@
+package doc_test
+
+import (
+	"bytes"
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
+)
+
+func ExampleGenManTree() {
+	cmd := &cobra.Command{
+		Use:   "test",
+		Short: "my test program",
+	}
+	header := &doc.GenManHeader{
+		Title:   "MINE",
+		Section: "3",
+	}
+	doc.GenManTree(cmd, header, "/tmp")
+}
+
+func ExampleGenMan() {
+	cmd := &cobra.Command{
+		Use:   "test",
+		Short: "my test program",
+	}
+	header := &doc.GenManHeader{
+		Title:   "MINE",
+		Section: "3",
+	}
+	out := new(bytes.Buffer)
+	doc.GenMan(cmd, header, out)
+	fmt.Print(out.String())
+}

vendor/github.com/spf13/cobra/doc/md_docs.go

@@ -0,0 +1,159 @@
+//Copyright 2015 Red Hat Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+func printOptions(buf *bytes.Buffer, cmd *cobra.Command, name string) error {
+	flags := cmd.NonInheritedFlags()
+	flags.SetOutput(buf)
+	if flags.HasFlags() {
+		buf.WriteString("### Options\n\n```\n")
+		flags.PrintDefaults()
+		buf.WriteString("```\n\n")
+	}
+
+	parentFlags := cmd.InheritedFlags()
+	parentFlags.SetOutput(buf)
+	if parentFlags.HasFlags() {
+		buf.WriteString("### Options inherited from parent commands\n\n```\n")
+		parentFlags.PrintDefaults()
+		buf.WriteString("```\n\n")
+	}
+	return nil
+}
+
+// GenMarkdown creates markdown output.
+func GenMarkdown(cmd *cobra.Command, w io.Writer) error {
+	return GenMarkdownCustom(cmd, w, func(s string) string { return s })
+}
+
+// GenMarkdownCustom creates custom markdown output.
+func GenMarkdownCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string) string) error {
+	cmd.InitDefaultHelpCmd()
+	cmd.InitDefaultHelpFlag()
+
+	buf := new(bytes.Buffer)
+	name := cmd.CommandPath()
+
+	short := cmd.Short
+	long := cmd.Long
+	if len(long) == 0 {
+		long = short
+	}
+
+	buf.WriteString("## " + name + "\n\n")
+	buf.WriteString(short + "\n\n")
+	buf.WriteString("### Synopsis\n\n")
+	buf.WriteString(long + "\n\n")
+
+	if cmd.Runnable() {
+		buf.WriteString(fmt.Sprintf("```\n%s\n```\n\n", cmd.UseLine()))
+	}
+
+	if len(cmd.Example) > 0 {
+		buf.WriteString("### Examples\n\n")
+		buf.WriteString(fmt.Sprintf("```\n%s\n```\n\n", cmd.Example))
+	}
+
+	if err := printOptions(buf, cmd, name); err != nil {
+		return err
+	}
+	if hasSeeAlso(cmd) {
+		buf.WriteString("### SEE ALSO\n\n")
+		if cmd.HasParent() {
+			parent := cmd.Parent()
+			pname := parent.CommandPath()
+			link := pname + ".md"
+			link = strings.Replace(link, " ", "_", -1)
+			buf.WriteString(fmt.Sprintf("* [%s](%s)\t - %s\n", pname, linkHandler(link), parent.Short))
+			cmd.VisitParents(func(c *cobra.Command) {
+				if c.DisableAutoGenTag {
+					cmd.DisableAutoGenTag = c.DisableAutoGenTag
+				}
+			})
+		}
+
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+
+		for _, child := range children {
+			if !child.IsAvailableCommand() || child.IsAdditionalHelpTopicCommand() {
+				continue
+			}
+			cname := name + " " + child.Name()
+			link := cname + ".md"
+			link = strings.Replace(link, " ", "_", -1)
+			buf.WriteString(fmt.Sprintf("* [%s](%s)\t - %s\n", cname, linkHandler(link), child.Short))
+		}
+		buf.WriteString("\n")
+	}
+	if !cmd.DisableAutoGenTag {
+		buf.WriteString("###### Auto generated by spf13/cobra on " + time.Now().Format("2-Jan-2006") + "\n")
+	}
+	_, err := buf.WriteTo(w)
+	return err
+}
+
+// GenMarkdownTree will generate a markdown page for this command and all
+// descendants in the directory given. The header may be nil.
+// This function may not work correctly if your command names have `-` in them.
+// If you have `cmd` with two subcmds, `sub` and `sub-third`,
+// and `sub` has a subcommand called `third`, it is undefined which
+// help output will be in the file `cmd-sub-third.1`.
+func GenMarkdownTree(cmd *cobra.Command, dir string) error {
+	identity := func(s string) string { return s }
+	emptyStr := func(s string) string { return "" }
+	return GenMarkdownTreeCustom(cmd, dir, emptyStr, identity)
+}
+
+// GenMarkdownTreeCustom is the the same as GenMarkdownTree, but
+// with custom filePrepender and linkHandler.
+func GenMarkdownTreeCustom(cmd *cobra.Command, dir string, filePrepender, linkHandler func(string) string) error {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		if err := GenMarkdownTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
+			return err
+		}
+	}
+
+	basename := strings.Replace(cmd.CommandPath(), " ", "_", -1) + ".md"
+	filename := filepath.Join(dir, basename)
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if _, err := io.WriteString(f, filePrepender(filename)); err != nil {
+		return err
+	}
+	if err := GenMarkdownCustom(cmd, f, linkHandler); err != nil {
+		return err
+	}
+	return nil
+}

vendor/github.com/spf13/cobra/doc/md_docs.md

@@ -0,0 +1,115 @@
+# Generating Markdown Docs For Your Own cobra.Command
+
+Generating man pages from a cobra command is incredibly easy. An example is as follows:
+
+```go
+package main
+
+import (
+	"log"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	cmd := &cobra.Command{
+		Use:   "test",
+		Short: "my test program",
+	}
+	err := doc.GenMarkdownTree(cmd, "/tmp")
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+```
+
+That will get you a Markdown document `/tmp/test.md`
+
+## Generate markdown docs for the entire command tree
+
+This program can actually generate docs for the kubectl command in the kubernetes project
+
+```go
+package main
+
+import (
+	"log"
+	"io/ioutil"
+	"os"
+
+	"k8s.io/kubernetes/pkg/kubectl/cmd"
+	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
+
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
+	err := doc.GenMarkdownTree(kubectl, "./")
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+```
+
+This will generate a whole series of files, one for each command in the tree, in the directory specified (in this case "./")
+
+## Generate markdown docs for a single command
+
+You may wish to have more control over the output, or only generate for a single command, instead of the entire command tree. If this is the case you may prefer to `GenMarkdown` instead of `GenMarkdownTree`
+
+```go
+	out := new(bytes.Buffer)
+	err := doc.GenMarkdown(cmd, out)
+	if err != nil {
+		log.Fatal(err)
+	}
+```
+
+This will write the markdown doc for ONLY "cmd" into the out, buffer.
+
+## Customize the output
+
+Both `GenMarkdown` and `GenMarkdownTree` have alternate versions with callbacks to get some control of the output:
+
+```go
+func GenMarkdownTreeCustom(cmd *Command, dir string, filePrepender, linkHandler func(string) string) error {
+	//...
+}
+```
+
+```go
+func GenMarkdownCustom(cmd *Command, out *bytes.Buffer, linkHandler func(string) string) error {
+	//...
+}
+```
+
+The `filePrepender` will prepend the return value given the full filepath to the rendered Markdown file. A common use case is to add front matter to use the generated documentation with [Hugo](http://gohugo.io/):
+
+```go
+const fmTemplate = `---
+date: %s
+title: "%s"
+slug: %s
+url: %s
+---
+`
+
+filePrepender := func(filename string) string {
+	now := time.Now().Format(time.RFC3339)
+	name := filepath.Base(filename)
+	base := strings.TrimSuffix(name, path.Ext(name))
+	url := "/commands/" + strings.ToLower(base) + "/"
+	return fmt.Sprintf(fmTemplate, now, strings.Replace(base, "_", " ", -1), base, url)
+}
+```
+
+The `linkHandler` can be used to customize the rendered internal links to the commands, given a filename:
+
+```go
+linkHandler := func(name string) string {
+	base := strings.TrimSuffix(name, path.Ext(name))
+	return "/commands/" + strings.ToLower(base) + "/"
+}
+```

vendor/github.com/spf13/cobra/doc/md_docs_test.go

@@ -0,0 +1,74 @@
+package doc
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/spf13/cobra"
+)
+
+func TestGenMdDoc(t *testing.T) {
+	// We generate on subcommand so we have both subcommands and parents.
+	buf := new(bytes.Buffer)
+	if err := GenMarkdown(echoCmd, buf); err != nil {
+		t.Fatal(err)
+	}
+	output := buf.String()
+
+	checkStringContains(t, output, echoCmd.Long)
+	checkStringContains(t, output, echoCmd.Example)
+	checkStringContains(t, output, "boolone")
+	checkStringContains(t, output, "rootflag")
+	checkStringContains(t, output, rootCmd.Short)
+	checkStringContains(t, output, echoSubCmd.Short)
+	checkStringOmits(t, output, deprecatedCmd.Short)
+}
+
+func TestGenMdNoTag(t *testing.T) {
+	rootCmd.DisableAutoGenTag = true
+	defer func() { rootCmd.DisableAutoGenTag = false }()
+
+	buf := new(bytes.Buffer)
+	if err := GenMarkdown(rootCmd, buf); err != nil {
+		t.Fatal(err)
+	}
+	output := buf.String()
+
+	checkStringOmits(t, output, "Auto generated")
+}
+
+func TestGenMdTree(t *testing.T) {
+	c := &cobra.Command{Use: "do [OPTIONS] arg1 arg2"}
+	tmpdir, err := ioutil.TempDir("", "test-gen-md-tree")
+	if err != nil {
+		t.Fatalf("Failed to create tmpdir: %v", err)
+	}
+	defer os.RemoveAll(tmpdir)
+
+	if err := GenMarkdownTree(c, tmpdir); err != nil {
+		t.Fatalf("GenMarkdownTree failed: %v", err)
+	}
+
+	if _, err := os.Stat(filepath.Join(tmpdir, "do.md")); err != nil {
+		t.Fatalf("Expected file 'do.md' to exist")
+	}
+}
+
+func BenchmarkGenMarkdownToFile(b *testing.B) {
+	file, err := ioutil.TempFile("", "")
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer os.Remove(file.Name())
+	defer file.Close()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		if err := GenMarkdown(rootCmd, file); err != nil {
+			b.Fatal(err)
+		}
+	}
+}

vendor/github.com/spf13/cobra/doc/rest_docs.go

@@ -0,0 +1,185 @@
+//Copyright 2015 Red Hat Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+func printOptionsReST(buf *bytes.Buffer, cmd *cobra.Command, name string) error {
+	flags := cmd.NonInheritedFlags()
+	flags.SetOutput(buf)
+	if flags.HasFlags() {
+		buf.WriteString("Options\n")
+		buf.WriteString("~~~~~~~\n\n::\n\n")
+		flags.PrintDefaults()
+		buf.WriteString("\n")
+	}
+
+	parentFlags := cmd.InheritedFlags()
+	parentFlags.SetOutput(buf)
+	if parentFlags.HasFlags() {
+		buf.WriteString("Options inherited from parent commands\n")
+		buf.WriteString("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\n::\n\n")
+		parentFlags.PrintDefaults()
+		buf.WriteString("\n")
+	}
+	return nil
+}
+
+// linkHandler for default ReST hyperlink markup
+func defaultLinkHandler(name, ref string) string {
+	return fmt.Sprintf("`%s <%s.rst>`_", name, ref)
+}
+
+// GenReST creates reStructured Text output.
+func GenReST(cmd *cobra.Command, w io.Writer) error {
+	return GenReSTCustom(cmd, w, defaultLinkHandler)
+}
+
+// GenReSTCustom creates custom reStructured Text output.
+func GenReSTCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string, string) string) error {
+	cmd.InitDefaultHelpCmd()
+	cmd.InitDefaultHelpFlag()
+
+	buf := new(bytes.Buffer)
+	name := cmd.CommandPath()
+
+	short := cmd.Short
+	long := cmd.Long
+	if len(long) == 0 {
+		long = short
+	}
+	ref := strings.Replace(name, " ", "_", -1)
+
+	buf.WriteString(".. _" + ref + ":\n\n")
+	buf.WriteString(name + "\n")
+	buf.WriteString(strings.Repeat("-", len(name)) + "\n\n")
+	buf.WriteString(short + "\n\n")
+	buf.WriteString("Synopsis\n")
+	buf.WriteString("~~~~~~~~\n\n")
+	buf.WriteString("\n" + long + "\n\n")
+
+	if cmd.Runnable() {
+		buf.WriteString(fmt.Sprintf("::\n\n  %s\n\n", cmd.UseLine()))
+	}
+
+	if len(cmd.Example) > 0 {
+		buf.WriteString("Examples\n")
+		buf.WriteString("~~~~~~~~\n\n")
+		buf.WriteString(fmt.Sprintf("::\n\n%s\n\n", indentString(cmd.Example, "  ")))
+	}
+
+	if err := printOptionsReST(buf, cmd, name); err != nil {
+		return err
+	}
+	if hasSeeAlso(cmd) {
+		buf.WriteString("SEE ALSO\n")
+		buf.WriteString("~~~~~~~~\n\n")
+		if cmd.HasParent() {
+			parent := cmd.Parent()
+			pname := parent.CommandPath()
+			ref = strings.Replace(pname, " ", "_", -1)
+			buf.WriteString(fmt.Sprintf("* %s \t - %s\n", linkHandler(pname, ref), parent.Short))
+			cmd.VisitParents(func(c *cobra.Command) {
+				if c.DisableAutoGenTag {
+					cmd.DisableAutoGenTag = c.DisableAutoGenTag
+				}
+			})
+		}
+
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+
+		for _, child := range children {
+			if !child.IsAvailableCommand() || child.IsAdditionalHelpTopicCommand() {
+				continue
+			}
+			cname := name + " " + child.Name()
+			ref = strings.Replace(cname, " ", "_", -1)
+			buf.WriteString(fmt.Sprintf("* %s \t - %s\n", linkHandler(cname, ref), child.Short))
+		}
+		buf.WriteString("\n")
+	}
+	if !cmd.DisableAutoGenTag {
+		buf.WriteString("*Auto generated by spf13/cobra on " + time.Now().Format("2-Jan-2006") + "*\n")
+	}
+	_, err := buf.WriteTo(w)
+	return err
+}
+
+// GenReSTTree will generate a ReST page for this command and all
+// descendants in the directory given.
+// This function may not work correctly if your command names have `-` in them.
+// If you have `cmd` with two subcmds, `sub` and `sub-third`,
+// and `sub` has a subcommand called `third`, it is undefined which
+// help output will be in the file `cmd-sub-third.1`.
+func GenReSTTree(cmd *cobra.Command, dir string) error {
+	emptyStr := func(s string) string { return "" }
+	return GenReSTTreeCustom(cmd, dir, emptyStr, defaultLinkHandler)
+}
+
+// GenReSTTreeCustom is the the same as GenReSTTree, but
+// with custom filePrepender and linkHandler.
+func GenReSTTreeCustom(cmd *cobra.Command, dir string, filePrepender func(string) string, linkHandler func(string, string) string) error {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		if err := GenReSTTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
+			return err
+		}
+	}
+
+	basename := strings.Replace(cmd.CommandPath(), " ", "_", -1) + ".rst"
+	filename := filepath.Join(dir, basename)
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if _, err := io.WriteString(f, filePrepender(filename)); err != nil {
+		return err
+	}
+	if err := GenReSTCustom(cmd, f, linkHandler); err != nil {
+		return err
+	}
+	return nil
+}
+
+// adapted from: https://github.com/kr/text/blob/main/indent.go
+func indentString(s, p string) string {
+	var res []byte
+	b := []byte(s)
+	prefix := []byte(p)
+	bol := true
+	for _, c := range b {
+		if bol && c != '\n' {
+			res = append(res, prefix...)
+		}
+		res = append(res, c)
+		bol = c == '\n'
+	}
+	return string(res)
+}

vendor/github.com/spf13/cobra/doc/rest_docs.md

@@ -0,0 +1,114 @@
+# Generating ReStructured Text Docs For Your Own cobra.Command
+
+Generating ReST pages from a cobra command is incredibly easy. An example is as follows:
+
+```go
+package main
+
+import (
+	"log"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	cmd := &cobra.Command{
+		Use:   "test",
+		Short: "my test program",
+	}
+	err := doc.GenReSTTree(cmd, "/tmp")
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+```
+
+That will get you a ReST document `/tmp/test.rst`
+
+## Generate ReST docs for the entire command tree
+
+This program can actually generate docs for the kubectl command in the kubernetes project
+
+```go
+package main
+
+import (
+	"log"
+	"io/ioutil"
+	"os"
+
+	"k8s.io/kubernetes/pkg/kubectl/cmd"
+	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
+
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
+	err := doc.GenReSTTree(kubectl, "./")
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+```
+
+This will generate a whole series of files, one for each command in the tree, in the directory specified (in this case "./")
+
+## Generate ReST docs for a single command
+
+You may wish to have more control over the output, or only generate for a single command, instead of the entire command tree. If this is the case you may prefer to `GenReST` instead of `GenReSTTree`
+
+```go
+	out := new(bytes.Buffer)
+	err := doc.GenReST(cmd, out)
+	if err != nil {
+		log.Fatal(err)
+	}
+```
+
+This will write the ReST doc for ONLY "cmd" into the out, buffer.
+
+## Customize the output
+
+Both `GenReST` and `GenReSTTree` have alternate versions with callbacks to get some control of the output:
+
+```go
+func GenReSTTreeCustom(cmd *Command, dir string, filePrepender func(string) string, linkHandler func(string, string) string) error {
+	//...
+}
+```
+
+```go
+func GenReSTCustom(cmd *Command, out *bytes.Buffer, linkHandler func(string, string) string) error {
+	//...
+}
+```
+
+The `filePrepender` will prepend the return value given the full filepath to the rendered ReST file. A common use case is to add front matter to use the generated documentation with [Hugo](http://gohugo.io/):
+
+```go
+const fmTemplate = `---
+date: %s
+title: "%s"
+slug: %s
+url: %s
+---
+`
+filePrepender := func(filename string) string {
+	now := time.Now().Format(time.RFC3339)
+	name := filepath.Base(filename)
+	base := strings.TrimSuffix(name, path.Ext(name))
+	url := "/commands/" + strings.ToLower(base) + "/"
+	return fmt.Sprintf(fmTemplate, now, strings.Replace(base, "_", " ", -1), base, url)
+}
+```
+
+The `linkHandler` can be used to customize the rendered links to the commands, given a command name and reference. This is useful while converting rst to html or while generating documentation with tools like Sphinx where `:ref:` is used:
+
+```go
+// Sphinx cross-referencing format
+linkHandler := func(name, ref string) string {
+    return fmt.Sprintf(":ref:`%s <%s>`", name, ref)
+}
+```

vendor/github.com/spf13/cobra/doc/rest_docs_test.go

@@ -0,0 +1,76 @@
+package doc
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/spf13/cobra"
+)
+
+func TestGenRSTDoc(t *testing.T) {
+	// We generate on a subcommand so we have both subcommands and parents
+	buf := new(bytes.Buffer)
+	if err := GenReST(echoCmd, buf); err != nil {
+		t.Fatal(err)
+	}
+	output := buf.String()
+
+	checkStringContains(t, output, echoCmd.Long)
+	checkStringContains(t, output, echoCmd.Example)
+	checkStringContains(t, output, "boolone")
+	checkStringContains(t, output, "rootflag")
+	checkStringContains(t, output, rootCmd.Short)
+	checkStringContains(t, output, echoSubCmd.Short)
+	checkStringOmits(t, output, deprecatedCmd.Short)
+}
+
+func TestGenRSTNoTag(t *testing.T) {
+	rootCmd.DisableAutoGenTag = true
+	defer func() { rootCmd.DisableAutoGenTag = false }()
+
+	buf := new(bytes.Buffer)
+	if err := GenReST(rootCmd, buf); err != nil {
+		t.Fatal(err)
+	}
+	output := buf.String()
+
+	unexpected := "Auto generated"
+	checkStringOmits(t, output, unexpected)
+}
+
+func TestGenRSTTree(t *testing.T) {
+	c := &cobra.Command{Use: "do [OPTIONS] arg1 arg2"}
+
+	tmpdir, err := ioutil.TempDir("", "test-gen-rst-tree")
+	if err != nil {
+		t.Fatalf("Failed to create tmpdir: %s", err.Error())
+	}
+	defer os.RemoveAll(tmpdir)
+
+	if err := GenReSTTree(c, tmpdir); err != nil {
+		t.Fatalf("GenReSTTree failed: %s", err.Error())
+	}
+
+	if _, err := os.Stat(filepath.Join(tmpdir, "do.rst")); err != nil {
+		t.Fatalf("Expected file 'do.rst' to exist")
+	}
+}
+
+func BenchmarkGenReSTToFile(b *testing.B) {
+	file, err := ioutil.TempFile("", "")
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer os.Remove(file.Name())
+	defer file.Close()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		if err := GenReST(rootCmd, file); err != nil {
+			b.Fatal(err)
+		}
+	}
+}

vendor/github.com/spf13/cobra/doc/util.go

@@ -0,0 +1,51 @@
+// Copyright 2015 Red Hat Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+// Test to see if we have a reason to print See Also information in docs
+// Basically this is a test for a parent commend or a subcommand which is
+// both not deprecated and not the autogenerated help command.
+func hasSeeAlso(cmd *cobra.Command) bool {
+	if cmd.HasParent() {
+		return true
+	}
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		return true
+	}
+	return false
+}
+
+// Temporary workaround for yaml lib generating incorrect yaml with long strings
+// that do not contain \n.
+func forceMultiLine(s string) string {
+	if len(s) > 60 && !strings.Contains(s, "\n") {
+		s = s + "\n"
+	}
+	return s
+}
+
+type byName []*cobra.Command
+
+func (s byName) Len() int           { return len(s) }
+func (s byName) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s byName) Less(i, j int) bool { return s[i].Name() < s[j].Name() }

vendor/github.com/spf13/cobra/doc/yaml_docs.go

@@ -0,0 +1,169 @@
+// Copyright 2016 French Ben. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+	"gopkg.in/yaml.v2"
+)
+
+type cmdOption struct {
+	Name         string
+	Shorthand    string `yaml:",omitempty"`
+	DefaultValue string `yaml:"default_value,omitempty"`
+	Usage        string `yaml:",omitempty"`
+}
+
+type cmdDoc struct {
+	Name             string
+	Synopsis         string      `yaml:",omitempty"`
+	Description      string      `yaml:",omitempty"`
+	Options          []cmdOption `yaml:",omitempty"`
+	InheritedOptions []cmdOption `yaml:"inherited_options,omitempty"`
+	Example          string      `yaml:",omitempty"`
+	SeeAlso          []string    `yaml:"see_also,omitempty"`
+}
+
+// GenYamlTree creates yaml structured ref files for this command and all descendants
+// in the directory given. This function may not work
+// correctly if your command names have `-` in them. If you have `cmd` with two
+// subcmds, `sub` and `sub-third`, and `sub` has a subcommand called `third`
+// it is undefined which help output will be in the file `cmd-sub-third.1`.
+func GenYamlTree(cmd *cobra.Command, dir string) error {
+	identity := func(s string) string { return s }
+	emptyStr := func(s string) string { return "" }
+	return GenYamlTreeCustom(cmd, dir, emptyStr, identity)
+}
+
+// GenYamlTreeCustom creates yaml structured ref files.
+func GenYamlTreeCustom(cmd *cobra.Command, dir string, filePrepender, linkHandler func(string) string) error {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		if err := GenYamlTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
+			return err
+		}
+	}
+
+	basename := strings.Replace(cmd.CommandPath(), " ", "_", -1) + ".yaml"
+	filename := filepath.Join(dir, basename)
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if _, err := io.WriteString(f, filePrepender(filename)); err != nil {
+		return err
+	}
+	if err := GenYamlCustom(cmd, f, linkHandler); err != nil {
+		return err
+	}
+	return nil
+}
+
+// GenYaml creates yaml output.
+func GenYaml(cmd *cobra.Command, w io.Writer) error {
+	return GenYamlCustom(cmd, w, func(s string) string { return s })
+}
+
+// GenYamlCustom creates custom yaml output.
+func GenYamlCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string) string) error {
+	cmd.InitDefaultHelpCmd()
+	cmd.InitDefaultHelpFlag()
+
+	yamlDoc := cmdDoc{}
+	yamlDoc.Name = cmd.CommandPath()
+
+	yamlDoc.Synopsis = forceMultiLine(cmd.Short)
+	yamlDoc.Description = forceMultiLine(cmd.Long)
+
+	if len(cmd.Example) > 0 {
+		yamlDoc.Example = cmd.Example
+	}
+
+	flags := cmd.NonInheritedFlags()
+	if flags.HasFlags() {
+		yamlDoc.Options = genFlagResult(flags)
+	}
+	flags = cmd.InheritedFlags()
+	if flags.HasFlags() {
+		yamlDoc.InheritedOptions = genFlagResult(flags)
+	}
+
+	if hasSeeAlso(cmd) {
+		result := []string{}
+		if cmd.HasParent() {
+			parent := cmd.Parent()
+			result = append(result, parent.CommandPath()+" - "+parent.Short)
+		}
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+		for _, child := range children {
+			if !child.IsAvailableCommand() || child.IsAdditionalHelpTopicCommand() {
+				continue
+			}
+			result = append(result, child.Name()+" - "+child.Short)
+		}
+		yamlDoc.SeeAlso = result
+	}
+
+	final, err := yaml.Marshal(&yamlDoc)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	if _, err := w.Write(final); err != nil {
+		return err
+	}
+	return nil
+}
+
+func genFlagResult(flags *pflag.FlagSet) []cmdOption {
+	var result []cmdOption
+
+	flags.VisitAll(func(flag *pflag.Flag) {
+		// Todo, when we mark a shorthand is deprecated, but specify an empty message.
+		// The flag.ShorthandDeprecated is empty as the shorthand is deprecated.
+		// Using len(flag.ShorthandDeprecated) > 0 can't handle this, others are ok.
+		if !(len(flag.ShorthandDeprecated) > 0) && len(flag.Shorthand) > 0 {
+			opt := cmdOption{
+				flag.Name,
+				flag.Shorthand,
+				flag.DefValue,
+				forceMultiLine(flag.Usage),
+			}
+			result = append(result, opt)
+		} else {
+			opt := cmdOption{
+				Name:         flag.Name,
+				DefaultValue: forceMultiLine(flag.DefValue),
+				Usage:        forceMultiLine(flag.Usage),
+			}
+			result = append(result, opt)
+		}
+	})
+
+	return result
+}

vendor/github.com/spf13/cobra/doc/yaml_docs.md

@@ -0,0 +1,112 @@
+# Generating Yaml Docs For Your Own cobra.Command
+
+Generating yaml files from a cobra command is incredibly easy. An example is as follows:
+
+```go
+package main
+
+import (
+	"log"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	cmd := &cobra.Command{
+		Use:   "test",
+		Short: "my test program",
+	}
+	err := doc.GenYamlTree(cmd, "/tmp")
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+```
+
+That will get you a Yaml document `/tmp/test.yaml`
+
+## Generate yaml docs for the entire command tree
+
+This program can actually generate docs for the kubectl command in the kubernetes project
+
+```go
+package main
+
+import (
+	"io/ioutil"
+	"log"
+	"os"
+
+	"k8s.io/kubernetes/pkg/kubectl/cmd"
+	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
+
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
+	err := doc.GenYamlTree(kubectl, "./")
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+```
+
+This will generate a whole series of files, one for each command in the tree, in the directory specified (in this case "./")
+
+## Generate yaml docs for a single command
+
+You may wish to have more control over the output, or only generate for a single command, instead of the entire command tree. If this is the case you may prefer to `GenYaml` instead of `GenYamlTree`
+
+```go
+	out := new(bytes.Buffer)
+	doc.GenYaml(cmd, out)
+```
+
+This will write the yaml doc for ONLY "cmd" into the out, buffer.
+
+## Customize the output
+
+Both `GenYaml` and `GenYamlTree` have alternate versions with callbacks to get some control of the output:
+
+```go
+func GenYamlTreeCustom(cmd *Command, dir string, filePrepender, linkHandler func(string) string) error {
+	//...
+}
+```
+
+```go
+func GenYamlCustom(cmd *Command, out *bytes.Buffer, linkHandler func(string) string) error {
+	//...
+}
+```
+
+The `filePrepender` will prepend the return value given the full filepath to the rendered Yaml file. A common use case is to add front matter to use the generated documentation with [Hugo](http://gohugo.io/):
+
+```go
+const fmTemplate = `---
+date: %s
+title: "%s"
+slug: %s
+url: %s
+---
+`
+
+filePrepender := func(filename string) string {
+	now := time.Now().Format(time.RFC3339)
+	name := filepath.Base(filename)
+	base := strings.TrimSuffix(name, path.Ext(name))
+	url := "/commands/" + strings.ToLower(base) + "/"
+	return fmt.Sprintf(fmTemplate, now, strings.Replace(base, "_", " ", -1), base, url)
+}
+```
+
+The `linkHandler` can be used to customize the rendered internal links to the commands, given a filename:
+
+```go
+linkHandler := func(name string) string {
+	base := strings.TrimSuffix(name, path.Ext(name))
+	return "/commands/" + strings.ToLower(base) + "/"
+}
+```

vendor/github.com/spf13/cobra/doc/yaml_docs_test.go

@@ -0,0 +1,74 @@
+package doc
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/spf13/cobra"
+)
+
+func TestGenYamlDoc(t *testing.T) {
+	// We generate on s subcommand so we have both subcommands and parents
+	buf := new(bytes.Buffer)
+	if err := GenYaml(echoCmd, buf); err != nil {
+		t.Fatal(err)
+	}
+	output := buf.String()
+
+	checkStringContains(t, output, echoCmd.Long)
+	checkStringContains(t, output, echoCmd.Example)
+	checkStringContains(t, output, "boolone")
+	checkStringContains(t, output, "rootflag")
+	checkStringContains(t, output, rootCmd.Short)
+	checkStringContains(t, output, echoSubCmd.Short)
+}
+
+func TestGenYamlNoTag(t *testing.T) {
+	rootCmd.DisableAutoGenTag = true
+	defer func() { rootCmd.DisableAutoGenTag = false }()
+
+	buf := new(bytes.Buffer)
+	if err := GenYaml(rootCmd, buf); err != nil {
+		t.Fatal(err)
+	}
+	output := buf.String()
+
+	checkStringOmits(t, output, "Auto generated")
+}
+
+func TestGenYamlTree(t *testing.T) {
+	c := &cobra.Command{Use: "do [OPTIONS] arg1 arg2"}
+
+	tmpdir, err := ioutil.TempDir("", "test-gen-yaml-tree")
+	if err != nil {
+		t.Fatalf("Failed to create tmpdir: %s", err.Error())
+	}
+	defer os.RemoveAll(tmpdir)
+
+	if err := GenYamlTree(c, tmpdir); err != nil {
+		t.Fatalf("GenYamlTree failed: %s", err.Error())
+	}
+
+	if _, err := os.Stat(filepath.Join(tmpdir, "do.yaml")); err != nil {
+		t.Fatalf("Expected file 'do.yaml' to exist")
+	}
+}
+
+func BenchmarkGenYamlToFile(b *testing.B) {
+	file, err := ioutil.TempFile("", "")
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer os.Remove(file.Name())
+	defer file.Close()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		if err := GenYaml(rootCmd, file); err != nil {
+			b.Fatal(err)
+		}
+	}
+}

vendor/github.com/spf13/cobra/zsh_completions.go

@@ -0,0 +1,126 @@
+package cobra
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// GenZshCompletionFile generates zsh completion file.
+func (c *Command) GenZshCompletionFile(filename string) error {
+	outFile, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer outFile.Close()
+
+	return c.GenZshCompletion(outFile)
+}
+
+// GenZshCompletion generates a zsh completion file and writes to the passed writer.
+func (c *Command) GenZshCompletion(w io.Writer) error {
+	buf := new(bytes.Buffer)
+
+	writeHeader(buf, c)
+	maxDepth := maxDepth(c)
+	writeLevelMapping(buf, maxDepth)
+	writeLevelCases(buf, maxDepth, c)
+
+	_, err := buf.WriteTo(w)
+	return err
+}
+
+func writeHeader(w io.Writer, cmd *Command) {
+	fmt.Fprintf(w, "#compdef %s\n\n", cmd.Name())
+}
+
+func maxDepth(c *Command) int {
+	if len(c.Commands()) == 0 {
+		return 0
+	}
+	maxDepthSub := 0
+	for _, s := range c.Commands() {
+		subDepth := maxDepth(s)
+		if subDepth > maxDepthSub {
+			maxDepthSub = subDepth
+		}
+	}
+	return 1 + maxDepthSub
+}
+
+func writeLevelMapping(w io.Writer, numLevels int) {
+	fmt.Fprintln(w, `_arguments \`)
+	for i := 1; i <= numLevels; i++ {
+		fmt.Fprintf(w, `  '%d: :->level%d' \`, i, i)
+		fmt.Fprintln(w)
+	}
+	fmt.Fprintf(w, `  '%d: :%s'`, numLevels+1, "_files")
+	fmt.Fprintln(w)
+}
+
+func writeLevelCases(w io.Writer, maxDepth int, root *Command) {
+	fmt.Fprintln(w, "case $state in")
+	defer fmt.Fprintln(w, "esac")
+
+	for i := 1; i <= maxDepth; i++ {
+		fmt.Fprintf(w, "  level%d)\n", i)
+		writeLevel(w, root, i)
+		fmt.Fprintln(w, "  ;;")
+	}
+	fmt.Fprintln(w, "  *)")
+	fmt.Fprintln(w, "    _arguments '*: :_files'")
+	fmt.Fprintln(w, "  ;;")
+}
+
+func writeLevel(w io.Writer, root *Command, i int) {
+	fmt.Fprintf(w, "    case $words[%d] in\n", i)
+	defer fmt.Fprintln(w, "    esac")
+
+	commands := filterByLevel(root, i)
+	byParent := groupByParent(commands)
+
+	for p, c := range byParent {
+		names := names(c)
+		fmt.Fprintf(w, "      %s)\n", p)
+		fmt.Fprintf(w, "        _arguments '%d: :(%s)'\n", i, strings.Join(names, " "))
+		fmt.Fprintln(w, "      ;;")
+	}
+	fmt.Fprintln(w, "      *)")
+	fmt.Fprintln(w, "        _arguments '*: :_files'")
+	fmt.Fprintln(w, "      ;;")
+
+}
+
+func filterByLevel(c *Command, l int) []*Command {
+	cs := make([]*Command, 0)
+	if l == 0 {
+		cs = append(cs, c)
+		return cs
+	}
+	for _, s := range c.Commands() {
+		cs = append(cs, filterByLevel(s, l-1)...)
+	}
+	return cs
+}
+
+func groupByParent(commands []*Command) map[string][]*Command {
+	m := make(map[string][]*Command)
+	for _, c := range commands {
+		parent := c.Parent()
+		if parent == nil {
+			continue
+		}
+		m[parent.Name()] = append(m[parent.Name()], c)
+	}
+	return m
+}
+
+func names(commands []*Command) []string {
+	ns := make([]string, len(commands))
+	for i, c := range commands {
+		ns[i] = c.Name()
+	}
+	return ns
+}

vendor/github.com/spf13/cobra/zsh_completions_test.go

@@ -0,0 +1,89 @@
+package cobra
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+)
+
+func TestZshCompletion(t *testing.T) {
+	tcs := []struct {
+		name                string
+		root                *Command
+		expectedExpressions []string
+	}{
+		{
+			name:                "trivial",
+			root:                &Command{Use: "trivialapp"},
+			expectedExpressions: []string{"#compdef trivial"},
+		},
+		{
+			name: "linear",
+			root: func() *Command {
+				r := &Command{Use: "linear"}
+
+				sub1 := &Command{Use: "sub1"}
+				r.AddCommand(sub1)
+
+				sub2 := &Command{Use: "sub2"}
+				sub1.AddCommand(sub2)
+
+				sub3 := &Command{Use: "sub3"}
+				sub2.AddCommand(sub3)
+				return r
+			}(),
+			expectedExpressions: []string{"sub1", "sub2", "sub3"},
+		},
+		{
+			name: "flat",
+			root: func() *Command {
+				r := &Command{Use: "flat"}
+				r.AddCommand(&Command{Use: "c1"})
+				r.AddCommand(&Command{Use: "c2"})
+				return r
+			}(),
+			expectedExpressions: []string{"(c1 c2)"},
+		},
+		{
+			name: "tree",
+			root: func() *Command {
+				r := &Command{Use: "tree"}
+
+				sub1 := &Command{Use: "sub1"}
+				r.AddCommand(sub1)
+
+				sub11 := &Command{Use: "sub11"}
+				sub12 := &Command{Use: "sub12"}
+
+				sub1.AddCommand(sub11)
+				sub1.AddCommand(sub12)
+
+				sub2 := &Command{Use: "sub2"}
+				r.AddCommand(sub2)
+
+				sub21 := &Command{Use: "sub21"}
+				sub22 := &Command{Use: "sub22"}
+
+				sub2.AddCommand(sub21)
+				sub2.AddCommand(sub22)
+
+				return r
+			}(),
+			expectedExpressions: []string{"(sub11 sub12)", "(sub21 sub22)"},
+		},
+	}
+
+	for _, tc := range tcs {
+		t.Run(tc.name, func(t *testing.T) {
+			buf := new(bytes.Buffer)
+			tc.root.GenZshCompletion(buf)
+			output := buf.String()
+
+			for _, expectedExpression := range tc.expectedExpressions {
+				if !strings.Contains(output, expectedExpression) {
+					t.Errorf("Expected completion to contain %q somewhere; got %q", expectedExpression, output)
+				}
+			}
+		})
+	}
+}

vendor/github.com/spf13/pflag/.gitignore

@@ -0,0 +1,2 @@
+.idea/*
+

vendor/github.com/spf13/pflag/.travis.yml

@@ -0,0 +1,21 @@
+sudo: false
+
+language: go
+
+go:
+  - 1.7.3
+  - 1.8.1
+  - tip
+
+matrix:
+  allow_failures:
+    - go: tip
+
+install:
+  - go get github.com/golang/lint/golint
+  - export PATH=$GOPATH/bin:$PATH
+  - go install ./...
+
+script:
+  - verify/all.sh -v
+  - go test ./...

vendor/github.com/spf13/pflag/LICENSE

@@ -0,0 +1,28 @@
+Copyright (c) 2012 Alex Ogier. All rights reserved.
+Copyright (c) 2012 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/spf13/pflag/README.md

@@ -0,0 +1,296 @@
+[![Build Status](https://travis-ci.org/spf13/pflag.svg?branch=master)](https://travis-ci.org/spf13/pflag)
+[![Go Report Card](https://goreportcard.com/badge/github.com/spf13/pflag)](https://goreportcard.com/report/github.com/spf13/pflag)
+[![GoDoc](https://godoc.org/github.com/spf13/pflag?status.svg)](https://godoc.org/github.com/spf13/pflag)
+
+## Description
+
+pflag is a drop-in replacement for Go's flag package, implementing
+POSIX/GNU-style --flags.
+
+pflag is compatible with the [GNU extensions to the POSIX recommendations
+for command-line options][1]. For a more precise description, see the
+"Command-line flag syntax" section below.
+
+[1]: http://www.gnu.org/software/libc/manual/html_node/Argument-Syntax.html
+
+pflag is available under the same style of BSD license as the Go language,
+which can be found in the LICENSE file.
+
+## Installation
+
+pflag is available using the standard `go get` command.
+
+Install by running:
+
+    go get github.com/spf13/pflag
+
+Run tests by running:
+
+    go test github.com/spf13/pflag
+
+## Usage
+
+pflag is a drop-in replacement of Go's native flag package. If you import
+pflag under the name "flag" then all code should continue to function
+with no changes.
+
+``` go
+import flag "github.com/spf13/pflag"
+```
+
+There is one exception to this: if you directly instantiate the Flag struct
+there is one more field "Shorthand" that you will need to set.
+Most code never instantiates this struct directly, and instead uses
+functions such as String(), BoolVar(), and Var(), and is therefore
+unaffected.
+
+Define flags using flag.String(), Bool(), Int(), etc.
+
+This declares an integer flag, -flagname, stored in the pointer ip, with type *int.
+
+``` go
+var ip *int = flag.Int("flagname", 1234, "help message for flagname")
+```
+
+If you like, you can bind the flag to a variable using the Var() functions.
+
+``` go
+var flagvar int
+func init() {
+    flag.IntVar(&flagvar, "flagname", 1234, "help message for flagname")
+}
+```
+
+Or you can create custom flags that satisfy the Value interface (with
+pointer receivers) and couple them to flag parsing by
+
+``` go
+flag.Var(&flagVal, "name", "help message for flagname")
+```
+
+For such flags, the default value is just the initial value of the variable.
+
+After all flags are defined, call
+
+``` go
+flag.Parse()
+```
+
+to parse the command line into the defined flags.
+
+Flags may then be used directly. If you're using the flags themselves,
+they are all pointers; if you bind to variables, they're values.
+
+``` go
+fmt.Println("ip has value ", *ip)
+fmt.Println("flagvar has value ", flagvar)
+```
+
+There are helpers function to get values later if you have the FlagSet but
+it was difficult to keep up with all of the flag pointers in your code.
+If you have a pflag.FlagSet with a flag called 'flagname' of type int you
+can use GetInt() to get the int value. But notice that 'flagname' must exist
+and it must be an int. GetString("flagname") will fail.
+
+``` go
+i, err := flagset.GetInt("flagname")
+```
+
+After parsing, the arguments after the flag are available as the
+slice flag.Args() or individually as flag.Arg(i).
+The arguments are indexed from 0 through flag.NArg()-1.
+
+The pflag package also defines some new functions that are not in flag,
+that give one-letter shorthands for flags. You can use these by appending
+'P' to the name of any function that defines a flag.
+
+``` go
+var ip = flag.IntP("flagname", "f", 1234, "help message")
+var flagvar bool
+func init() {
+	flag.BoolVarP(&flagvar, "boolname", "b", true, "help message")
+}
+flag.VarP(&flagVal, "varname", "v", "help message")
+```
+
+Shorthand letters can be used with single dashes on the command line.
+Boolean shorthand flags can be combined with other shorthand flags.
+
+The default set of command-line flags is controlled by
+top-level functions.  The FlagSet type allows one to define
+independent sets of flags, such as to implement subcommands
+in a command-line interface. The methods of FlagSet are
+analogous to the top-level functions for the command-line
+flag set.
+
+## Setting no option default values for flags
+
+After you create a flag it is possible to set the pflag.NoOptDefVal for
+the given flag. Doing this changes the meaning of the flag slightly. If
+a flag has a NoOptDefVal and the flag is set on the command line without
+an option the flag will be set to the NoOptDefVal. For example given:
+
+``` go
+var ip = flag.IntP("flagname", "f", 1234, "help message")
+flag.Lookup("flagname").NoOptDefVal = "4321"
+```
+
+Would result in something like
+
+| Parsed Arguments | Resulting Value |
+| -------------    | -------------   |
+| --flagname=1357  | ip=1357         |
+| --flagname       | ip=4321         |
+| [nothing]        | ip=1234         |
+
+## Command line flag syntax
+
+```
+--flag    // boolean flags, or flags with no option default values
+--flag x  // only on flags without a default value
+--flag=x
+```
+
+Unlike the flag package, a single dash before an option means something
+different than a double dash. Single dashes signify a series of shorthand
+letters for flags. All but the last shorthand letter must be boolean flags
+or a flag with a default value
+
+```
+// boolean or flags where the 'no option default value' is set
+-f
+-f=true
+-abc
+but
+-b true is INVALID
+
+// non-boolean and flags without a 'no option default value'
+-n 1234
+-n=1234
+-n1234
+
+// mixed
+-abcs "hello"
+-absd="hello"
+-abcs1234
+```
+
+Flag parsing stops after the terminator "--". Unlike the flag package,
+flags can be interspersed with arguments anywhere on the command line
+before this terminator.
+
+Integer flags accept 1234, 0664, 0x1234 and may be negative.
+Boolean flags (in their long form) accept 1, 0, t, f, true, false,
+TRUE, FALSE, True, False.
+Duration flags accept any input valid for time.ParseDuration.
+
+## Mutating or "Normalizing" Flag names
+
+It is possible to set a custom flag name 'normalization function.' It allows flag names to be mutated both when created in the code and when used on the command line to some 'normalized' form. The 'normalized' form is used for comparison. Two examples of using the custom normalization func follow.
+
+**Example #1**: You want -, _, and . in flags to compare the same. aka --my-flag == --my_flag == --my.flag
+
+``` go
+func wordSepNormalizeFunc(f *pflag.FlagSet, name string) pflag.NormalizedName {
+	from := []string{"-", "_"}
+	to := "."
+	for _, sep := range from {
+		name = strings.Replace(name, sep, to, -1)
+	}
+	return pflag.NormalizedName(name)
+}
+
+myFlagSet.SetNormalizeFunc(wordSepNormalizeFunc)
+```
+
+**Example #2**: You want to alias two flags. aka --old-flag-name == --new-flag-name
+
+``` go
+func aliasNormalizeFunc(f *pflag.FlagSet, name string) pflag.NormalizedName {
+	switch name {
+	case "old-flag-name":
+		name = "new-flag-name"
+		break
+	}
+	return pflag.NormalizedName(name)
+}
+
+myFlagSet.SetNormalizeFunc(aliasNormalizeFunc)
+```
+
+## Deprecating a flag or its shorthand
+It is possible to deprecate a flag, or just its shorthand. Deprecating a flag/shorthand hides it from help text and prints a usage message when the deprecated flag/shorthand is used.
+
+**Example #1**: You want to deprecate a flag named "badflag" as well as inform the users what flag they should use instead.
+```go
+// deprecate a flag by specifying its name and a usage message
+flags.MarkDeprecated("badflag", "please use --good-flag instead")
+```
+This hides "badflag" from help text, and prints `Flag --badflag has been deprecated, please use --good-flag instead` when "badflag" is used.
+
+**Example #2**: You want to keep a flag name "noshorthandflag" but deprecate its shortname "n".
+```go
+// deprecate a flag shorthand by specifying its flag name and a usage message
+flags.MarkShorthandDeprecated("noshorthandflag", "please use --noshorthandflag only")
+```
+This hides the shortname "n" from help text, and prints `Flag shorthand -n has been deprecated, please use --noshorthandflag only` when the shorthand "n" is used.
+
+Note that usage message is essential here, and it should not be empty.
+
+## Hidden flags
+It is possible to mark a flag as hidden, meaning it will still function as normal, however will not show up in usage/help text.
+
+**Example**: You have a flag named "secretFlag" that you need for internal use only and don't want it showing up in help text, or for its usage text to be available.
+```go
+// hide a flag by specifying its name
+flags.MarkHidden("secretFlag")
+```
+
+## Disable sorting of flags
+`pflag` allows you to disable sorting of flags for help and usage message.
+
+**Example**:
+```go
+flags.BoolP("verbose", "v", false, "verbose output")
+flags.String("coolflag", "yeaah", "it's really cool flag")
+flags.Int("usefulflag", 777, "sometimes it's very useful")
+flags.SortFlags = false
+flags.PrintDefaults()
+```
+**Output**:
+```
+  -v, --verbose           verbose output
+      --coolflag string   it's really cool flag (default "yeaah")
+      --usefulflag int    sometimes it's very useful (default 777)
+```
+
+
+## Supporting Go flags when using pflag
+In order to support flags defined using Go's `flag` package, they must be added to the `pflag` flagset. This is usually necessary
+to support flags defined by third-party dependencies (e.g. `golang/glog`).
+
+**Example**: You want to add the Go flags to the `CommandLine` flagset
+```go
+import (
+	goflag "flag"
+	flag "github.com/spf13/pflag"
+)
+
+var ip *int = flag.Int("flagname", 1234, "help message for flagname")
+
+func main() {
+	flag.CommandLine.AddGoFlagSet(goflag.CommandLine)
+	flag.Parse()
+}
+```
+
+## More info
+
+You can see the full reference documentation of the pflag package
+[at godoc.org][3], or through go's standard documentation system by
+running `godoc -http=:6060` and browsing to
+[http://localhost:6060/pkg/github.com/spf13/pflag][2] after
+installation.
+
+[2]: http://localhost:6060/pkg/github.com/spf13/pflag
+[3]: http://godoc.org/github.com/spf13/pflag

vendor/github.com/spf13/pflag/bool.go

@@ -0,0 +1,94 @@
+package pflag
+
+import "strconv"
+
+// optional interface to indicate boolean flags that can be
+// supplied without "=value" text
+type boolFlag interface {
+	Value
+	IsBoolFlag() bool
+}
+
+// -- bool Value
+type boolValue bool
+
+func newBoolValue(val bool, p *bool) *boolValue {
+	*p = val
+	return (*boolValue)(p)
+}
+
+func (b *boolValue) Set(s string) error {
+	v, err := strconv.ParseBool(s)
+	*b = boolValue(v)
+	return err
+}
+
+func (b *boolValue) Type() string {
+	return "bool"
+}
+
+func (b *boolValue) String() string { return strconv.FormatBool(bool(*b)) }
+
+func (b *boolValue) IsBoolFlag() bool { return true }
+
+func boolConv(sval string) (interface{}, error) {
+	return strconv.ParseBool(sval)
+}
+
+// GetBool return the bool value of a flag with the given name
+func (f *FlagSet) GetBool(name string) (bool, error) {
+	val, err := f.getFlagType(name, "bool", boolConv)
+	if err != nil {
+		return false, err
+	}
+	return val.(bool), nil
+}
+
+// BoolVar defines a bool flag with specified name, default value, and usage string.
+// The argument p points to a bool variable in which to store the value of the flag.
+func (f *FlagSet) BoolVar(p *bool, name string, value bool, usage string) {
+	f.BoolVarP(p, name, "", value, usage)
+}
+
+// BoolVarP is like BoolVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolVarP(p *bool, name, shorthand string, value bool, usage string) {
+	flag := f.VarPF(newBoolValue(value, p), name, shorthand, usage)
+	flag.NoOptDefVal = "true"
+}
+
+// BoolVar defines a bool flag with specified name, default value, and usage string.
+// The argument p points to a bool variable in which to store the value of the flag.
+func BoolVar(p *bool, name string, value bool, usage string) {
+	BoolVarP(p, name, "", value, usage)
+}
+
+// BoolVarP is like BoolVar, but accepts a shorthand letter that can be used after a single dash.
+func BoolVarP(p *bool, name, shorthand string, value bool, usage string) {
+	flag := CommandLine.VarPF(newBoolValue(value, p), name, shorthand, usage)
+	flag.NoOptDefVal = "true"
+}
+
+// Bool defines a bool flag with specified name, default value, and usage string.
+// The return value is the address of a bool variable that stores the value of the flag.
+func (f *FlagSet) Bool(name string, value bool, usage string) *bool {
+	return f.BoolP(name, "", value, usage)
+}
+
+// BoolP is like Bool, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolP(name, shorthand string, value bool, usage string) *bool {
+	p := new(bool)
+	f.BoolVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Bool defines a bool flag with specified name, default value, and usage string.
+// The return value is the address of a bool variable that stores the value of the flag.
+func Bool(name string, value bool, usage string) *bool {
+	return BoolP(name, "", value, usage)
+}
+
+// BoolP is like Bool, but accepts a shorthand letter that can be used after a single dash.
+func BoolP(name, shorthand string, value bool, usage string) *bool {
+	b := CommandLine.BoolP(name, shorthand, value, usage)
+	return b
+}

vendor/github.com/spf13/pflag/bool_slice.go

@@ -0,0 +1,147 @@
+package pflag
+
+import (
+	"io"
+	"strconv"
+	"strings"
+)
+
+// -- boolSlice Value
+type boolSliceValue struct {
+	value   *[]bool
+	changed bool
+}
+
+func newBoolSliceValue(val []bool, p *[]bool) *boolSliceValue {
+	bsv := new(boolSliceValue)
+	bsv.value = p
+	*bsv.value = val
+	return bsv
+}
+
+// Set converts, and assigns, the comma-separated boolean argument string representation as the []bool value of this flag.
+// If Set is called on a flag that already has a []bool assigned, the newly converted values will be appended.
+func (s *boolSliceValue) Set(val string) error {
+
+	// remove all quote characters
+	rmQuote := strings.NewReplacer(`"`, "", `'`, "", "`", "")
+
+	// read flag arguments with CSV parser
+	boolStrSlice, err := readAsCSV(rmQuote.Replace(val))
+	if err != nil && err != io.EOF {
+		return err
+	}
+
+	// parse boolean values into slice
+	out := make([]bool, 0, len(boolStrSlice))
+	for _, boolStr := range boolStrSlice {
+		b, err := strconv.ParseBool(strings.TrimSpace(boolStr))
+		if err != nil {
+			return err
+		}
+		out = append(out, b)
+	}
+
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+
+	s.changed = true
+
+	return nil
+}
+
+// Type returns a string that uniquely represents this flag's type.
+func (s *boolSliceValue) Type() string {
+	return "boolSlice"
+}
+
+// String defines a "native" format for this boolean slice flag value.
+func (s *boolSliceValue) String() string {
+
+	boolStrSlice := make([]string, len(*s.value))
+	for i, b := range *s.value {
+		boolStrSlice[i] = strconv.FormatBool(b)
+	}
+
+	out, _ := writeAsCSV(boolStrSlice)
+
+	return "[" + out + "]"
+}
+
+func boolSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Empty string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []bool{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]bool, len(ss))
+	for i, t := range ss {
+		var err error
+		out[i], err = strconv.ParseBool(t)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return out, nil
+}
+
+// GetBoolSlice returns the []bool value of a flag with the given name.
+func (f *FlagSet) GetBoolSlice(name string) ([]bool, error) {
+	val, err := f.getFlagType(name, "boolSlice", boolSliceConv)
+	if err != nil {
+		return []bool{}, err
+	}
+	return val.([]bool), nil
+}
+
+// BoolSliceVar defines a boolSlice flag with specified name, default value, and usage string.
+// The argument p points to a []bool variable in which to store the value of the flag.
+func (f *FlagSet) BoolSliceVar(p *[]bool, name string, value []bool, usage string) {
+	f.VarP(newBoolSliceValue(value, p), name, "", usage)
+}
+
+// BoolSliceVarP is like BoolSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolSliceVarP(p *[]bool, name, shorthand string, value []bool, usage string) {
+	f.VarP(newBoolSliceValue(value, p), name, shorthand, usage)
+}
+
+// BoolSliceVar defines a []bool flag with specified name, default value, and usage string.
+// The argument p points to a []bool variable in which to store the value of the flag.
+func BoolSliceVar(p *[]bool, name string, value []bool, usage string) {
+	CommandLine.VarP(newBoolSliceValue(value, p), name, "", usage)
+}
+
+// BoolSliceVarP is like BoolSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func BoolSliceVarP(p *[]bool, name, shorthand string, value []bool, usage string) {
+	CommandLine.VarP(newBoolSliceValue(value, p), name, shorthand, usage)
+}
+
+// BoolSlice defines a []bool flag with specified name, default value, and usage string.
+// The return value is the address of a []bool variable that stores the value of the flag.
+func (f *FlagSet) BoolSlice(name string, value []bool, usage string) *[]bool {
+	p := []bool{}
+	f.BoolSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// BoolSliceP is like BoolSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolSliceP(name, shorthand string, value []bool, usage string) *[]bool {
+	p := []bool{}
+	f.BoolSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// BoolSlice defines a []bool flag with specified name, default value, and usage string.
+// The return value is the address of a []bool variable that stores the value of the flag.
+func BoolSlice(name string, value []bool, usage string) *[]bool {
+	return CommandLine.BoolSliceP(name, "", value, usage)
+}
+
+// BoolSliceP is like BoolSlice, but accepts a shorthand letter that can be used after a single dash.
+func BoolSliceP(name, shorthand string, value []bool, usage string) *[]bool {
+	return CommandLine.BoolSliceP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/bool_slice_test.go

@@ -0,0 +1,215 @@
+package pflag
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func setUpBSFlagSet(bsp *[]bool) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.BoolSliceVar(bsp, "bs", []bool{}, "Command separated list!")
+	return f
+}
+
+func setUpBSFlagSetWithDefault(bsp *[]bool) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.BoolSliceVar(bsp, "bs", []bool{false, true}, "Command separated list!")
+	return f
+}
+
+func TestEmptyBS(t *testing.T) {
+	var bs []bool
+	f := setUpBSFlagSet(&bs)
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	getBS, err := f.GetBoolSlice("bs")
+	if err != nil {
+		t.Fatal("got an error from GetBoolSlice():", err)
+	}
+	if len(getBS) != 0 {
+		t.Fatalf("got bs %v with len=%d but expected length=0", getBS, len(getBS))
+	}
+}
+
+func TestBS(t *testing.T) {
+	var bs []bool
+	f := setUpBSFlagSet(&bs)
+
+	vals := []string{"1", "F", "TRUE", "0"}
+	arg := fmt.Sprintf("--bs=%s", strings.Join(vals, ","))
+	err := f.Parse([]string{arg})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range bs {
+		b, err := strconv.ParseBool(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if b != v {
+			t.Fatalf("expected is[%d] to be %s but got: %t", i, vals[i], v)
+		}
+	}
+	getBS, err := f.GetBoolSlice("bs")
+	if err != nil {
+		t.Fatalf("got error: %v", err)
+	}
+	for i, v := range getBS {
+		b, err := strconv.ParseBool(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if b != v {
+			t.Fatalf("expected bs[%d] to be %s but got: %t from GetBoolSlice", i, vals[i], v)
+		}
+	}
+}
+
+func TestBSDefault(t *testing.T) {
+	var bs []bool
+	f := setUpBSFlagSetWithDefault(&bs)
+
+	vals := []string{"false", "T"}
+
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range bs {
+		b, err := strconv.ParseBool(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if b != v {
+			t.Fatalf("expected bs[%d] to be %t from GetBoolSlice but got: %t", i, b, v)
+		}
+	}
+
+	getBS, err := f.GetBoolSlice("bs")
+	if err != nil {
+		t.Fatal("got an error from GetBoolSlice():", err)
+	}
+	for i, v := range getBS {
+		b, err := strconv.ParseBool(vals[i])
+		if err != nil {
+			t.Fatal("got an error from GetBoolSlice():", err)
+		}
+		if b != v {
+			t.Fatalf("expected bs[%d] to be %t from GetBoolSlice but got: %t", i, b, v)
+		}
+	}
+}
+
+func TestBSWithDefault(t *testing.T) {
+	var bs []bool
+	f := setUpBSFlagSetWithDefault(&bs)
+
+	vals := []string{"FALSE", "1"}
+	arg := fmt.Sprintf("--bs=%s", strings.Join(vals, ","))
+	err := f.Parse([]string{arg})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range bs {
+		b, err := strconv.ParseBool(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if b != v {
+			t.Fatalf("expected bs[%d] to be %t but got: %t", i, b, v)
+		}
+	}
+
+	getBS, err := f.GetBoolSlice("bs")
+	if err != nil {
+		t.Fatal("got an error from GetBoolSlice():", err)
+	}
+	for i, v := range getBS {
+		b, err := strconv.ParseBool(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if b != v {
+			t.Fatalf("expected bs[%d] to be %t from GetBoolSlice but got: %t", i, b, v)
+		}
+	}
+}
+
+func TestBSCalledTwice(t *testing.T) {
+	var bs []bool
+	f := setUpBSFlagSet(&bs)
+
+	in := []string{"T,F", "T"}
+	expected := []bool{true, false, true}
+	argfmt := "--bs=%s"
+	arg1 := fmt.Sprintf(argfmt, in[0])
+	arg2 := fmt.Sprintf(argfmt, in[1])
+	err := f.Parse([]string{arg1, arg2})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range bs {
+		if expected[i] != v {
+			t.Fatalf("expected bs[%d] to be %t but got %t", i, expected[i], v)
+		}
+	}
+}
+
+func TestBSBadQuoting(t *testing.T) {
+
+	tests := []struct {
+		Want    []bool
+		FlagArg []string
+	}{
+		{
+			Want:    []bool{true, false, true},
+			FlagArg: []string{"1", "0", "true"},
+		},
+		{
+			Want:    []bool{true, false},
+			FlagArg: []string{"True", "F"},
+		},
+		{
+			Want:    []bool{true, false},
+			FlagArg: []string{"T", "0"},
+		},
+		{
+			Want:    []bool{true, false},
+			FlagArg: []string{"1", "0"},
+		},
+		{
+			Want:    []bool{true, false, false},
+			FlagArg: []string{"true,false", "false"},
+		},
+		{
+			Want:    []bool{true, false, false, true, false, true, false},
+			FlagArg: []string{`"true,false,false,1,0,     T"`, " false "},
+		},
+		{
+			Want:    []bool{false, false, true, false, true, false, true},
+			FlagArg: []string{`"0, False,  T,false  , true,F"`, "true"},
+		},
+	}
+
+	for i, test := range tests {
+
+		var bs []bool
+		f := setUpBSFlagSet(&bs)
+
+		if err := f.Parse([]string{fmt.Sprintf("--bs=%s", strings.Join(test.FlagArg, ","))}); err != nil {
+			t.Fatalf("flag parsing failed with error: %s\nparsing:\t%#v\nwant:\t\t%#v",
+				err, test.FlagArg, test.Want[i])
+		}
+
+		for j, b := range bs {
+			if b != test.Want[j] {
+				t.Fatalf("bad value parsed for test %d on bool %d:\nwant:\t%t\ngot:\t%t", i, j, test.Want[j], b)
+			}
+		}
+	}
+}

vendor/github.com/spf13/pflag/bool_test.go

@@ -0,0 +1,179 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag
+
+import (
+	"bytes"
+	"strconv"
+	"testing"
+)
+
+// This value can be a boolean ("true", "false") or "maybe"
+type triStateValue int
+
+const (
+	triStateFalse triStateValue = 0
+	triStateTrue  triStateValue = 1
+	triStateMaybe triStateValue = 2
+)
+
+const strTriStateMaybe = "maybe"
+
+func (v *triStateValue) IsBoolFlag() bool {
+	return true
+}
+
+func (v *triStateValue) Get() interface{} {
+	return triStateValue(*v)
+}
+
+func (v *triStateValue) Set(s string) error {
+	if s == strTriStateMaybe {
+		*v = triStateMaybe
+		return nil
+	}
+	boolVal, err := strconv.ParseBool(s)
+	if boolVal {
+		*v = triStateTrue
+	} else {
+		*v = triStateFalse
+	}
+	return err
+}
+
+func (v *triStateValue) String() string {
+	if *v == triStateMaybe {
+		return strTriStateMaybe
+	}
+	return strconv.FormatBool(*v == triStateTrue)
+}
+
+// The type of the flag as required by the pflag.Value interface
+func (v *triStateValue) Type() string {
+	return "version"
+}
+
+func setUpFlagSet(tristate *triStateValue) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	*tristate = triStateFalse
+	flag := f.VarPF(tristate, "tristate", "t", "tristate value (true, maybe or false)")
+	flag.NoOptDefVal = "true"
+	return f
+}
+
+func TestExplicitTrue(t *testing.T) {
+	var tristate triStateValue
+	f := setUpFlagSet(&tristate)
+	err := f.Parse([]string{"--tristate=true"})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	if tristate != triStateTrue {
+		t.Fatal("expected", triStateTrue, "(triStateTrue) but got", tristate, "instead")
+	}
+}
+
+func TestImplicitTrue(t *testing.T) {
+	var tristate triStateValue
+	f := setUpFlagSet(&tristate)
+	err := f.Parse([]string{"--tristate"})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	if tristate != triStateTrue {
+		t.Fatal("expected", triStateTrue, "(triStateTrue) but got", tristate, "instead")
+	}
+}
+
+func TestShortFlag(t *testing.T) {
+	var tristate triStateValue
+	f := setUpFlagSet(&tristate)
+	err := f.Parse([]string{"-t"})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	if tristate != triStateTrue {
+		t.Fatal("expected", triStateTrue, "(triStateTrue) but got", tristate, "instead")
+	}
+}
+
+func TestShortFlagExtraArgument(t *testing.T) {
+	var tristate triStateValue
+	f := setUpFlagSet(&tristate)
+	// The"maybe"turns into an arg, since short boolean options will only do true/false
+	err := f.Parse([]string{"-t", "maybe"})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	if tristate != triStateTrue {
+		t.Fatal("expected", triStateTrue, "(triStateTrue) but got", tristate, "instead")
+	}
+	args := f.Args()
+	if len(args) != 1 || args[0] != "maybe" {
+		t.Fatal("expected an extra 'maybe' argument to stick around")
+	}
+}
+
+func TestExplicitMaybe(t *testing.T) {
+	var tristate triStateValue
+	f := setUpFlagSet(&tristate)
+	err := f.Parse([]string{"--tristate=maybe"})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	if tristate != triStateMaybe {
+		t.Fatal("expected", triStateMaybe, "(triStateMaybe) but got", tristate, "instead")
+	}
+}
+
+func TestExplicitFalse(t *testing.T) {
+	var tristate triStateValue
+	f := setUpFlagSet(&tristate)
+	err := f.Parse([]string{"--tristate=false"})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	if tristate != triStateFalse {
+		t.Fatal("expected", triStateFalse, "(triStateFalse) but got", tristate, "instead")
+	}
+}
+
+func TestImplicitFalse(t *testing.T) {
+	var tristate triStateValue
+	f := setUpFlagSet(&tristate)
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	if tristate != triStateFalse {
+		t.Fatal("expected", triStateFalse, "(triStateFalse) but got", tristate, "instead")
+	}
+}
+
+func TestInvalidValue(t *testing.T) {
+	var tristate triStateValue
+	f := setUpFlagSet(&tristate)
+	var buf bytes.Buffer
+	f.SetOutput(&buf)
+	err := f.Parse([]string{"--tristate=invalid"})
+	if err == nil {
+		t.Fatal("expected an error but did not get any, tristate has value", tristate)
+	}
+}
+
+func TestBoolP(t *testing.T) {
+	b := BoolP("bool", "b", false, "bool value in CommandLine")
+	c := BoolP("c", "c", false, "other bool value")
+	args := []string{"--bool"}
+	if err := CommandLine.Parse(args); err != nil {
+		t.Error("expected no error, got ", err)
+	}
+	if *b != true {
+		t.Errorf("expected b=true got b=%v", *b)
+	}
+	if *c != false {
+		t.Errorf("expect c=false got c=%v", *c)
+	}
+}

vendor/github.com/spf13/pflag/bytes.go

@@ -0,0 +1,105 @@
+package pflag
+
+import (
+	"encoding/hex"
+	"fmt"
+	"strings"
+)
+
+// BytesHex adapts []byte for use as a flag. Value of flag is HEX encoded
+type bytesHexValue []byte
+
+func (bytesHex bytesHexValue) String() string {
+	return fmt.Sprintf("%X", []byte(bytesHex))
+}
+
+func (bytesHex *bytesHexValue) Set(value string) error {
+	bin, err := hex.DecodeString(strings.TrimSpace(value))
+
+	if err != nil {
+		return err
+	}
+
+	*bytesHex = bin
+
+	return nil
+}
+
+func (*bytesHexValue) Type() string {
+	return "bytesHex"
+}
+
+func newBytesHexValue(val []byte, p *[]byte) *bytesHexValue {
+	*p = val
+	return (*bytesHexValue)(p)
+}
+
+func bytesHexConv(sval string) (interface{}, error) {
+
+	bin, err := hex.DecodeString(sval)
+
+	if err == nil {
+		return bin, nil
+	}
+
+	return nil, fmt.Errorf("invalid string being converted to Bytes: %s %s", sval, err)
+}
+
+// GetBytesHex return the []byte value of a flag with the given name
+func (f *FlagSet) GetBytesHex(name string) ([]byte, error) {
+	val, err := f.getFlagType(name, "bytesHex", bytesHexConv)
+
+	if err != nil {
+		return []byte{}, err
+	}
+
+	return val.([]byte), nil
+}
+
+// BytesHexVar defines an []byte flag with specified name, default value, and usage string.
+// The argument p points to an []byte variable in which to store the value of the flag.
+func (f *FlagSet) BytesHexVar(p *[]byte, name string, value []byte, usage string) {
+	f.VarP(newBytesHexValue(value, p), name, "", usage)
+}
+
+// BytesHexVarP is like BytesHexVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BytesHexVarP(p *[]byte, name, shorthand string, value []byte, usage string) {
+	f.VarP(newBytesHexValue(value, p), name, shorthand, usage)
+}
+
+// BytesHexVar defines an []byte flag with specified name, default value, and usage string.
+// The argument p points to an []byte variable in which to store the value of the flag.
+func BytesHexVar(p *[]byte, name string, value []byte, usage string) {
+	CommandLine.VarP(newBytesHexValue(value, p), name, "", usage)
+}
+
+// BytesHexVarP is like BytesHexVar, but accepts a shorthand letter that can be used after a single dash.
+func BytesHexVarP(p *[]byte, name, shorthand string, value []byte, usage string) {
+	CommandLine.VarP(newBytesHexValue(value, p), name, shorthand, usage)
+}
+
+// BytesHex defines an []byte flag with specified name, default value, and usage string.
+// The return value is the address of an []byte variable that stores the value of the flag.
+func (f *FlagSet) BytesHex(name string, value []byte, usage string) *[]byte {
+	p := new([]byte)
+	f.BytesHexVarP(p, name, "", value, usage)
+	return p
+}
+
+// BytesHexP is like BytesHex, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BytesHexP(name, shorthand string, value []byte, usage string) *[]byte {
+	p := new([]byte)
+	f.BytesHexVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// BytesHex defines an []byte flag with specified name, default value, and usage string.
+// The return value is the address of an []byte variable that stores the value of the flag.
+func BytesHex(name string, value []byte, usage string) *[]byte {
+	return CommandLine.BytesHexP(name, "", value, usage)
+}
+
+// BytesHexP is like BytesHex, but accepts a shorthand letter that can be used after a single dash.
+func BytesHexP(name, shorthand string, value []byte, usage string) *[]byte {
+	return CommandLine.BytesHexP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/bytes_test.go

@@ -0,0 +1,72 @@
+package pflag
+
+import (
+	"fmt"
+	"os"
+	"testing"
+)
+
+func setUpBytesHex(bytesHex *[]byte) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.BytesHexVar(bytesHex, "bytes", []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}, "Some bytes in HEX")
+	f.BytesHexVarP(bytesHex, "bytes2", "B", []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}, "Some bytes in HEX")
+	return f
+}
+
+func TestBytesHex(t *testing.T) {
+	testCases := []struct {
+		input    string
+		success  bool
+		expected string
+	}{
+		/// Positive cases
+		{"", true, ""}, // Is empty string OK ?
+		{"01", true, "01"},
+		{"0101", true, "0101"},
+		{"1234567890abcdef", true, "1234567890ABCDEF"},
+		{"1234567890ABCDEF", true, "1234567890ABCDEF"},
+
+		// Negative cases
+		{"0", false, ""},   // Short string
+		{"000", false, ""}, /// Odd-length string
+		{"qq", false, ""},  /// non-hex character
+	}
+
+	devnull, _ := os.Open(os.DevNull)
+	os.Stderr = devnull
+
+	for i := range testCases {
+		var bytesHex []byte
+		f := setUpBytesHex(&bytesHex)
+
+		tc := &testCases[i]
+
+		// --bytes
+		args := []string{
+			fmt.Sprintf("--bytes=%s", tc.input),
+			fmt.Sprintf("-B  %s", tc.input),
+			fmt.Sprintf("--bytes2=%s", tc.input),
+		}
+
+		for _, arg := range args {
+			err := f.Parse([]string{arg})
+
+			if err != nil && tc.success == true {
+				t.Errorf("expected success, got %q", err)
+				continue
+			} else if err == nil && tc.success == false {
+				// bytesHex, err := f.GetBytesHex("bytes")
+				t.Errorf("expected failure while processing %q", tc.input)
+				continue
+			} else if tc.success {
+				bytesHex, err := f.GetBytesHex("bytes")
+				if err != nil {
+					t.Errorf("Got error trying to fetch the IP flag: %v", err)
+				}
+				if fmt.Sprintf("%X", bytesHex) != tc.expected {
+					t.Errorf("expected %q, got '%X'", tc.expected, bytesHex)
+				}
+			}
+		}
+	}
+}

vendor/github.com/spf13/pflag/count.go

@@ -0,0 +1,96 @@
+package pflag
+
+import "strconv"
+
+// -- count Value
+type countValue int
+
+func newCountValue(val int, p *int) *countValue {
+	*p = val
+	return (*countValue)(p)
+}
+
+func (i *countValue) Set(s string) error {
+	// "+1" means that no specific value was passed, so increment
+	if s == "+1" {
+		*i = countValue(*i + 1)
+		return nil
+	}
+	v, err := strconv.ParseInt(s, 0, 0)
+	*i = countValue(v)
+	return err
+}
+
+func (i *countValue) Type() string {
+	return "count"
+}
+
+func (i *countValue) String() string { return strconv.Itoa(int(*i)) }
+
+func countConv(sval string) (interface{}, error) {
+	i, err := strconv.Atoi(sval)
+	if err != nil {
+		return nil, err
+	}
+	return i, nil
+}
+
+// GetCount return the int value of a flag with the given name
+func (f *FlagSet) GetCount(name string) (int, error) {
+	val, err := f.getFlagType(name, "count", countConv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int), nil
+}
+
+// CountVar defines a count flag with specified name, default value, and usage string.
+// The argument p points to an int variable in which to store the value of the flag.
+// A count flag will add 1 to its value evey time it is found on the command line
+func (f *FlagSet) CountVar(p *int, name string, usage string) {
+	f.CountVarP(p, name, "", usage)
+}
+
+// CountVarP is like CountVar only take a shorthand for the flag name.
+func (f *FlagSet) CountVarP(p *int, name, shorthand string, usage string) {
+	flag := f.VarPF(newCountValue(0, p), name, shorthand, usage)
+	flag.NoOptDefVal = "+1"
+}
+
+// CountVar like CountVar only the flag is placed on the CommandLine instead of a given flag set
+func CountVar(p *int, name string, usage string) {
+	CommandLine.CountVar(p, name, usage)
+}
+
+// CountVarP is like CountVar only take a shorthand for the flag name.
+func CountVarP(p *int, name, shorthand string, usage string) {
+	CommandLine.CountVarP(p, name, shorthand, usage)
+}
+
+// Count defines a count flag with specified name, default value, and usage string.
+// The return value is the address of an int variable that stores the value of the flag.
+// A count flag will add 1 to its value evey time it is found on the command line
+func (f *FlagSet) Count(name string, usage string) *int {
+	p := new(int)
+	f.CountVarP(p, name, "", usage)
+	return p
+}
+
+// CountP is like Count only takes a shorthand for the flag name.
+func (f *FlagSet) CountP(name, shorthand string, usage string) *int {
+	p := new(int)
+	f.CountVarP(p, name, shorthand, usage)
+	return p
+}
+
+// Count defines a count flag with specified name, default value, and usage string.
+// The return value is the address of an int variable that stores the value of the flag.
+// A count flag will add 1 to its value evey time it is found on the command line
+func Count(name string, usage string) *int {
+	return CommandLine.CountP(name, "", usage)
+}
+
+// CountP is like Count only takes a shorthand for the flag name.
+func CountP(name, shorthand string, usage string) *int {
+	return CommandLine.CountP(name, shorthand, usage)
+}

vendor/github.com/spf13/pflag/count_test.go

@@ -0,0 +1,56 @@
+package pflag
+
+import (
+	"os"
+	"testing"
+)
+
+func setUpCount(c *int) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.CountVarP(c, "verbose", "v", "a counter")
+	return f
+}
+
+func TestCount(t *testing.T) {
+	testCases := []struct {
+		input    []string
+		success  bool
+		expected int
+	}{
+		{[]string{}, true, 0},
+		{[]string{"-v"}, true, 1},
+		{[]string{"-vvv"}, true, 3},
+		{[]string{"-v", "-v", "-v"}, true, 3},
+		{[]string{"-v", "--verbose", "-v"}, true, 3},
+		{[]string{"-v=3", "-v"}, true, 4},
+		{[]string{"--verbose=0"}, true, 0},
+		{[]string{"-v=0"}, true, 0},
+		{[]string{"-v=a"}, false, 0},
+	}
+
+	devnull, _ := os.Open(os.DevNull)
+	os.Stderr = devnull
+	for i := range testCases {
+		var count int
+		f := setUpCount(&count)
+
+		tc := &testCases[i]
+
+		err := f.Parse(tc.input)
+		if err != nil && tc.success == true {
+			t.Errorf("expected success, got %q", err)
+			continue
+		} else if err == nil && tc.success == false {
+			t.Errorf("expected failure, got success")
+			continue
+		} else if tc.success {
+			c, err := f.GetCount("verbose")
+			if err != nil {
+				t.Errorf("Got error trying to fetch the counter flag")
+			}
+			if c != tc.expected {
+				t.Errorf("expected %d, got %d", tc.expected, c)
+			}
+		}
+	}
+}

vendor/github.com/spf13/pflag/duration.go

@@ -0,0 +1,86 @@
+package pflag
+
+import (
+	"time"
+)
+
+// -- time.Duration Value
+type durationValue time.Duration
+
+func newDurationValue(val time.Duration, p *time.Duration) *durationValue {
+	*p = val
+	return (*durationValue)(p)
+}
+
+func (d *durationValue) Set(s string) error {
+	v, err := time.ParseDuration(s)
+	*d = durationValue(v)
+	return err
+}
+
+func (d *durationValue) Type() string {
+	return "duration"
+}
+
+func (d *durationValue) String() string { return (*time.Duration)(d).String() }
+
+func durationConv(sval string) (interface{}, error) {
+	return time.ParseDuration(sval)
+}
+
+// GetDuration return the duration value of a flag with the given name
+func (f *FlagSet) GetDuration(name string) (time.Duration, error) {
+	val, err := f.getFlagType(name, "duration", durationConv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(time.Duration), nil
+}
+
+// DurationVar defines a time.Duration flag with specified name, default value, and usage string.
+// The argument p points to a time.Duration variable in which to store the value of the flag.
+func (f *FlagSet) DurationVar(p *time.Duration, name string, value time.Duration, usage string) {
+	f.VarP(newDurationValue(value, p), name, "", usage)
+}
+
+// DurationVarP is like DurationVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationVarP(p *time.Duration, name, shorthand string, value time.Duration, usage string) {
+	f.VarP(newDurationValue(value, p), name, shorthand, usage)
+}
+
+// DurationVar defines a time.Duration flag with specified name, default value, and usage string.
+// The argument p points to a time.Duration variable in which to store the value of the flag.
+func DurationVar(p *time.Duration, name string, value time.Duration, usage string) {
+	CommandLine.VarP(newDurationValue(value, p), name, "", usage)
+}
+
+// DurationVarP is like DurationVar, but accepts a shorthand letter that can be used after a single dash.
+func DurationVarP(p *time.Duration, name, shorthand string, value time.Duration, usage string) {
+	CommandLine.VarP(newDurationValue(value, p), name, shorthand, usage)
+}
+
+// Duration defines a time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a time.Duration variable that stores the value of the flag.
+func (f *FlagSet) Duration(name string, value time.Duration, usage string) *time.Duration {
+	p := new(time.Duration)
+	f.DurationVarP(p, name, "", value, usage)
+	return p
+}
+
+// DurationP is like Duration, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationP(name, shorthand string, value time.Duration, usage string) *time.Duration {
+	p := new(time.Duration)
+	f.DurationVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Duration defines a time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a time.Duration variable that stores the value of the flag.
+func Duration(name string, value time.Duration, usage string) *time.Duration {
+	return CommandLine.DurationP(name, "", value, usage)
+}
+
+// DurationP is like Duration, but accepts a shorthand letter that can be used after a single dash.
+func DurationP(name, shorthand string, value time.Duration, usage string) *time.Duration {
+	return CommandLine.DurationP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/duration_slice.go

@@ -0,0 +1,128 @@
+package pflag
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+// -- durationSlice Value
+type durationSliceValue struct {
+	value   *[]time.Duration
+	changed bool
+}
+
+func newDurationSliceValue(val []time.Duration, p *[]time.Duration) *durationSliceValue {
+	dsv := new(durationSliceValue)
+	dsv.value = p
+	*dsv.value = val
+	return dsv
+}
+
+func (s *durationSliceValue) Set(val string) error {
+	ss := strings.Split(val, ",")
+	out := make([]time.Duration, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = time.ParseDuration(d)
+		if err != nil {
+			return err
+		}
+
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *durationSliceValue) Type() string {
+	return "durationSlice"
+}
+
+func (s *durationSliceValue) String() string {
+	out := make([]string, len(*s.value))
+	for i, d := range *s.value {
+		out[i] = fmt.Sprintf("%s", d)
+	}
+	return "[" + strings.Join(out, ",") + "]"
+}
+
+func durationSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Empty string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []time.Duration{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]time.Duration, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = time.ParseDuration(d)
+		if err != nil {
+			return nil, err
+		}
+
+	}
+	return out, nil
+}
+
+// GetDurationSlice returns the []time.Duration value of a flag with the given name
+func (f *FlagSet) GetDurationSlice(name string) ([]time.Duration, error) {
+	val, err := f.getFlagType(name, "durationSlice", durationSliceConv)
+	if err != nil {
+		return []time.Duration{}, err
+	}
+	return val.([]time.Duration), nil
+}
+
+// DurationSliceVar defines a durationSlice flag with specified name, default value, and usage string.
+// The argument p points to a []time.Duration variable in which to store the value of the flag.
+func (f *FlagSet) DurationSliceVar(p *[]time.Duration, name string, value []time.Duration, usage string) {
+	f.VarP(newDurationSliceValue(value, p), name, "", usage)
+}
+
+// DurationSliceVarP is like DurationSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationSliceVarP(p *[]time.Duration, name, shorthand string, value []time.Duration, usage string) {
+	f.VarP(newDurationSliceValue(value, p), name, shorthand, usage)
+}
+
+// DurationSliceVar defines a duration[] flag with specified name, default value, and usage string.
+// The argument p points to a duration[] variable in which to store the value of the flag.
+func DurationSliceVar(p *[]time.Duration, name string, value []time.Duration, usage string) {
+	CommandLine.VarP(newDurationSliceValue(value, p), name, "", usage)
+}
+
+// DurationSliceVarP is like DurationSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func DurationSliceVarP(p *[]time.Duration, name, shorthand string, value []time.Duration, usage string) {
+	CommandLine.VarP(newDurationSliceValue(value, p), name, shorthand, usage)
+}
+
+// DurationSlice defines a []time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a []time.Duration variable that stores the value of the flag.
+func (f *FlagSet) DurationSlice(name string, value []time.Duration, usage string) *[]time.Duration {
+	p := []time.Duration{}
+	f.DurationSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// DurationSliceP is like DurationSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationSliceP(name, shorthand string, value []time.Duration, usage string) *[]time.Duration {
+	p := []time.Duration{}
+	f.DurationSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// DurationSlice defines a []time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a []time.Duration variable that stores the value of the flag.
+func DurationSlice(name string, value []time.Duration, usage string) *[]time.Duration {
+	return CommandLine.DurationSliceP(name, "", value, usage)
+}
+
+// DurationSliceP is like DurationSlice, but accepts a shorthand letter that can be used after a single dash.
+func DurationSliceP(name, shorthand string, value []time.Duration, usage string) *[]time.Duration {
+	return CommandLine.DurationSliceP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/duration_slice_test.go

@@ -0,0 +1,165 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code ds governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+)
+
+func setUpDSFlagSet(dsp *[]time.Duration) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.DurationSliceVar(dsp, "ds", []time.Duration{}, "Command separated list!")
+	return f
+}
+
+func setUpDSFlagSetWithDefault(dsp *[]time.Duration) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.DurationSliceVar(dsp, "ds", []time.Duration{0, 1}, "Command separated list!")
+	return f
+}
+
+func TestEmptyDS(t *testing.T) {
+	var ds []time.Duration
+	f := setUpDSFlagSet(&ds)
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	getDS, err := f.GetDurationSlice("ds")
+	if err != nil {
+		t.Fatal("got an error from GetDurationSlice():", err)
+	}
+	if len(getDS) != 0 {
+		t.Fatalf("got ds %v with len=%d but expected length=0", getDS, len(getDS))
+	}
+}
+
+func TestDS(t *testing.T) {
+	var ds []time.Duration
+	f := setUpDSFlagSet(&ds)
+
+	vals := []string{"1ns", "2ms", "3m", "4h"}
+	arg := fmt.Sprintf("--ds=%s", strings.Join(vals, ","))
+	err := f.Parse([]string{arg})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range ds {
+		d, err := time.ParseDuration(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if d != v {
+			t.Fatalf("expected ds[%d] to be %s but got: %d", i, vals[i], v)
+		}
+	}
+	getDS, err := f.GetDurationSlice("ds")
+	if err != nil {
+		t.Fatalf("got error: %v", err)
+	}
+	for i, v := range getDS {
+		d, err := time.ParseDuration(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if d != v {
+			t.Fatalf("expected ds[%d] to be %s but got: %d from GetDurationSlice", i, vals[i], v)
+		}
+	}
+}
+
+func TestDSDefault(t *testing.T) {
+	var ds []time.Duration
+	f := setUpDSFlagSetWithDefault(&ds)
+
+	vals := []string{"0s", "1ns"}
+
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range ds {
+		d, err := time.ParseDuration(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if d != v {
+			t.Fatalf("expected ds[%d] to be %d but got: %d", i, d, v)
+		}
+	}
+
+	getDS, err := f.GetDurationSlice("ds")
+	if err != nil {
+		t.Fatal("got an error from GetDurationSlice():", err)
+	}
+	for i, v := range getDS {
+		d, err := time.ParseDuration(vals[i])
+		if err != nil {
+			t.Fatal("got an error from GetDurationSlice():", err)
+		}
+		if d != v {
+			t.Fatalf("expected ds[%d] to be %d from GetDurationSlice but got: %d", i, d, v)
+		}
+	}
+}
+
+func TestDSWithDefault(t *testing.T) {
+	var ds []time.Duration
+	f := setUpDSFlagSetWithDefault(&ds)
+
+	vals := []string{"1ns", "2ns"}
+	arg := fmt.Sprintf("--ds=%s", strings.Join(vals, ","))
+	err := f.Parse([]string{arg})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range ds {
+		d, err := time.ParseDuration(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if d != v {
+			t.Fatalf("expected ds[%d] to be %d but got: %d", i, d, v)
+		}
+	}
+
+	getDS, err := f.GetDurationSlice("ds")
+	if err != nil {
+		t.Fatal("got an error from GetDurationSlice():", err)
+	}
+	for i, v := range getDS {
+		d, err := time.ParseDuration(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if d != v {
+			t.Fatalf("expected ds[%d] to be %d from GetDurationSlice but got: %d", i, d, v)
+		}
+	}
+}
+
+func TestDSCalledTwice(t *testing.T) {
+	var ds []time.Duration
+	f := setUpDSFlagSet(&ds)
+
+	in := []string{"1ns,2ns", "3ns"}
+	expected := []time.Duration{1, 2, 3}
+	argfmt := "--ds=%s"
+	arg1 := fmt.Sprintf(argfmt, in[0])
+	arg2 := fmt.Sprintf(argfmt, in[1])
+	err := f.Parse([]string{arg1, arg2})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range ds {
+		if expected[i] != v {
+			t.Fatalf("expected ds[%d] to be %d but got: %d", i, expected[i], v)
+		}
+	}
+}

vendor/github.com/spf13/pflag/example_test.go

@@ -0,0 +1,36 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag_test
+
+import (
+	"fmt"
+
+	"github.com/spf13/pflag"
+)
+
+func ExampleShorthandLookup() {
+	name := "verbose"
+	short := name[:1]
+
+	pflag.BoolP(name, short, false, "verbose output")
+
+	// len(short) must be == 1
+	flag := pflag.ShorthandLookup(short)
+
+	fmt.Println(flag.Name)
+}
+
+func ExampleFlagSet_ShorthandLookup() {
+	name := "verbose"
+	short := name[:1]
+
+	fs := pflag.NewFlagSet("Example", pflag.ContinueOnError)
+	fs.BoolP(name, short, false, "verbose output")
+
+	// len(short) must be == 1
+	flag := fs.ShorthandLookup(short)
+
+	fmt.Println(flag.Name)
+}

vendor/github.com/spf13/pflag/export_test.go

@@ -0,0 +1,29 @@
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag
+
+import (
+	"io/ioutil"
+	"os"
+)
+
+// Additional routines compiled into the package only during testing.
+
+// ResetForTesting clears all flag state and sets the usage function as directed.
+// After calling ResetForTesting, parse errors in flag handling will not
+// exit the program.
+func ResetForTesting(usage func()) {
+	CommandLine = &FlagSet{
+		name:          os.Args[0],
+		errorHandling: ContinueOnError,
+		output:        ioutil.Discard,
+	}
+	Usage = usage
+}
+
+// GetCommandLine returns the default FlagSet.
+func GetCommandLine() *FlagSet {
+	return CommandLine
+}

vendor/github.com/spf13/pflag/flag.go

@@ -0,0 +1,1223 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package pflag is a drop-in replacement for Go's flag package, implementing
+POSIX/GNU-style --flags.
+
+pflag is compatible with the GNU extensions to the POSIX recommendations
+for command-line options. See
+http://www.gnu.org/software/libc/manual/html_node/Argument-Syntax.html
+
+Usage:
+
+pflag is a drop-in replacement of Go's native flag package. If you import
+pflag under the name "flag" then all code should continue to function
+with no changes.
+
+	import flag "github.com/spf13/pflag"
+
+There is one exception to this: if you directly instantiate the Flag struct
+there is one more field "Shorthand" that you will need to set.
+Most code never instantiates this struct directly, and instead uses
+functions such as String(), BoolVar(), and Var(), and is therefore
+unaffected.
+
+Define flags using flag.String(), Bool(), Int(), etc.
+
+This declares an integer flag, -flagname, stored in the pointer ip, with type *int.
+	var ip = flag.Int("flagname", 1234, "help message for flagname")
+If you like, you can bind the flag to a variable using the Var() functions.
+	var flagvar int
+	func init() {
+		flag.IntVar(&flagvar, "flagname", 1234, "help message for flagname")
+	}
+Or you can create custom flags that satisfy the Value interface (with
+pointer receivers) and couple them to flag parsing by
+	flag.Var(&flagVal, "name", "help message for flagname")
+For such flags, the default value is just the initial value of the variable.
+
+After all flags are defined, call
+	flag.Parse()
+to parse the command line into the defined flags.
+
+Flags may then be used directly. If you're using the flags themselves,
+they are all pointers; if you bind to variables, they're values.
+	fmt.Println("ip has value ", *ip)
+	fmt.Println("flagvar has value ", flagvar)
+
+After parsing, the arguments after the flag are available as the
+slice flag.Args() or individually as flag.Arg(i).
+The arguments are indexed from 0 through flag.NArg()-1.
+
+The pflag package also defines some new functions that are not in flag,
+that give one-letter shorthands for flags. You can use these by appending
+'P' to the name of any function that defines a flag.
+	var ip = flag.IntP("flagname", "f", 1234, "help message")
+	var flagvar bool
+	func init() {
+		flag.BoolVarP("boolname", "b", true, "help message")
+	}
+	flag.VarP(&flagVar, "varname", "v", 1234, "help message")
+Shorthand letters can be used with single dashes on the command line.
+Boolean shorthand flags can be combined with other shorthand flags.
+
+Command line flag syntax:
+	--flag    // boolean flags only
+	--flag=x
+
+Unlike the flag package, a single dash before an option means something
+different than a double dash. Single dashes signify a series of shorthand
+letters for flags. All but the last shorthand letter must be boolean flags.
+	// boolean flags
+	-f
+	-abc
+	// non-boolean flags
+	-n 1234
+	-Ifile
+	// mixed
+	-abcs "hello"
+	-abcn1234
+
+Flag parsing stops after the terminator "--". Unlike the flag package,
+flags can be interspersed with arguments anywhere on the command line
+before this terminator.
+
+Integer flags accept 1234, 0664, 0x1234 and may be negative.
+Boolean flags (in their long form) accept 1, 0, t, f, true, false,
+TRUE, FALSE, True, False.
+Duration flags accept any input valid for time.ParseDuration.
+
+The default set of command-line flags is controlled by
+top-level functions.  The FlagSet type allows one to define
+independent sets of flags, such as to implement subcommands
+in a command-line interface. The methods of FlagSet are
+analogous to the top-level functions for the command-line
+flag set.
+*/
+package pflag
+
+import (
+	"bytes"
+	"errors"
+	goflag "flag"
+	"fmt"
+	"io"
+	"os"
+	"sort"
+	"strings"
+)
+
+// ErrHelp is the error returned if the flag -help is invoked but no such flag is defined.
+var ErrHelp = errors.New("pflag: help requested")
+
+// ErrorHandling defines how to handle flag parsing errors.
+type ErrorHandling int
+
+const (
+	// ContinueOnError will return an err from Parse() if an error is found
+	ContinueOnError ErrorHandling = iota
+	// ExitOnError will call os.Exit(2) if an error is found when parsing
+	ExitOnError
+	// PanicOnError will panic() if an error is found when parsing flags
+	PanicOnError
+)
+
+// ParseErrorsWhitelist defines the parsing errors that can be ignored
+type ParseErrorsWhitelist struct {
+	// UnknownFlags will ignore unknown flags errors and continue parsing rest of the flags
+	UnknownFlags bool
+}
+
+// NormalizedName is a flag name that has been normalized according to rules
+// for the FlagSet (e.g. making '-' and '_' equivalent).
+type NormalizedName string
+
+// A FlagSet represents a set of defined flags.
+type FlagSet struct {
+	// Usage is the function called when an error occurs while parsing flags.
+	// The field is a function (not a method) that may be changed to point to
+	// a custom error handler.
+	Usage func()
+
+	// SortFlags is used to indicate, if user wants to have sorted flags in
+	// help/usage messages.
+	SortFlags bool
+
+	// ParseErrorsWhitelist is used to configure a whitelist of errors
+	ParseErrorsWhitelist ParseErrorsWhitelist
+
+	name              string
+	parsed            bool
+	actual            map[NormalizedName]*Flag
+	orderedActual     []*Flag
+	sortedActual      []*Flag
+	formal            map[NormalizedName]*Flag
+	orderedFormal     []*Flag
+	sortedFormal      []*Flag
+	shorthands        map[byte]*Flag
+	args              []string // arguments after flags
+	argsLenAtDash     int      // len(args) when a '--' was located when parsing, or -1 if no --
+	errorHandling     ErrorHandling
+	output            io.Writer // nil means stderr; use out() accessor
+	interspersed      bool      // allow interspersed option/non-option args
+	normalizeNameFunc func(f *FlagSet, name string) NormalizedName
+
+	addedGoFlagSets []*goflag.FlagSet
+}
+
+// A Flag represents the state of a flag.
+type Flag struct {
+	Name                string              // name as it appears on command line
+	Shorthand           string              // one-letter abbreviated flag
+	Usage               string              // help message
+	Value               Value               // value as set
+	DefValue            string              // default value (as text); for usage message
+	Changed             bool                // If the user set the value (or if left to default)
+	NoOptDefVal         string              // default value (as text); if the flag is on the command line without any options
+	Deprecated          string              // If this flag is deprecated, this string is the new or now thing to use
+	Hidden              bool                // used by cobra.Command to allow flags to be hidden from help/usage text
+	ShorthandDeprecated string              // If the shorthand of this flag is deprecated, this string is the new or now thing to use
+	Annotations         map[string][]string // used by cobra.Command bash autocomple code
+}
+
+// Value is the interface to the dynamic value stored in a flag.
+// (The default value is represented as a string.)
+type Value interface {
+	String() string
+	Set(string) error
+	Type() string
+}
+
+// sortFlags returns the flags as a slice in lexicographical sorted order.
+func sortFlags(flags map[NormalizedName]*Flag) []*Flag {
+	list := make(sort.StringSlice, len(flags))
+	i := 0
+	for k := range flags {
+		list[i] = string(k)
+		i++
+	}
+	list.Sort()
+	result := make([]*Flag, len(list))
+	for i, name := range list {
+		result[i] = flags[NormalizedName(name)]
+	}
+	return result
+}
+
+// SetNormalizeFunc allows you to add a function which can translate flag names.
+// Flags added to the FlagSet will be translated and then when anything tries to
+// look up the flag that will also be translated. So it would be possible to create
+// a flag named "getURL" and have it translated to "geturl".  A user could then pass
+// "--getUrl" which may also be translated to "geturl" and everything will work.
+func (f *FlagSet) SetNormalizeFunc(n func(f *FlagSet, name string) NormalizedName) {
+	f.normalizeNameFunc = n
+	f.sortedFormal = f.sortedFormal[:0]
+	for fname, flag := range f.formal {
+		nname := f.normalizeFlagName(flag.Name)
+		if fname == nname {
+			continue
+		}
+		flag.Name = string(nname)
+		delete(f.formal, fname)
+		f.formal[nname] = flag
+		if _, set := f.actual[fname]; set {
+			delete(f.actual, fname)
+			f.actual[nname] = flag
+		}
+	}
+}
+
+// GetNormalizeFunc returns the previously set NormalizeFunc of a function which
+// does no translation, if not set previously.
+func (f *FlagSet) GetNormalizeFunc() func(f *FlagSet, name string) NormalizedName {
+	if f.normalizeNameFunc != nil {
+		return f.normalizeNameFunc
+	}
+	return func(f *FlagSet, name string) NormalizedName { return NormalizedName(name) }
+}
+
+func (f *FlagSet) normalizeFlagName(name string) NormalizedName {
+	n := f.GetNormalizeFunc()
+	return n(f, name)
+}
+
+func (f *FlagSet) out() io.Writer {
+	if f.output == nil {
+		return os.Stderr
+	}
+	return f.output
+}
+
+// SetOutput sets the destination for usage and error messages.
+// If output is nil, os.Stderr is used.
+func (f *FlagSet) SetOutput(output io.Writer) {
+	f.output = output
+}
+
+// VisitAll visits the flags in lexicographical order or
+// in primordial order if f.SortFlags is false, calling fn for each.
+// It visits all flags, even those not set.
+func (f *FlagSet) VisitAll(fn func(*Flag)) {
+	if len(f.formal) == 0 {
+		return
+	}
+
+	var flags []*Flag
+	if f.SortFlags {
+		if len(f.formal) != len(f.sortedFormal) {
+			f.sortedFormal = sortFlags(f.formal)
+		}
+		flags = f.sortedFormal
+	} else {
+		flags = f.orderedFormal
+	}
+
+	for _, flag := range flags {
+		fn(flag)
+	}
+}
+
+// HasFlags returns a bool to indicate if the FlagSet has any flags defined.
+func (f *FlagSet) HasFlags() bool {
+	return len(f.formal) > 0
+}
+
+// HasAvailableFlags returns a bool to indicate if the FlagSet has any flags
+// that are not hidden.
+func (f *FlagSet) HasAvailableFlags() bool {
+	for _, flag := range f.formal {
+		if !flag.Hidden {
+			return true
+		}
+	}
+	return false
+}
+
+// VisitAll visits the command-line flags in lexicographical order or
+// in primordial order if f.SortFlags is false, calling fn for each.
+// It visits all flags, even those not set.
+func VisitAll(fn func(*Flag)) {
+	CommandLine.VisitAll(fn)
+}
+
+// Visit visits the flags in lexicographical order or
+// in primordial order if f.SortFlags is false, calling fn for each.
+// It visits only those flags that have been set.
+func (f *FlagSet) Visit(fn func(*Flag)) {
+	if len(f.actual) == 0 {
+		return
+	}
+
+	var flags []*Flag
+	if f.SortFlags {
+		if len(f.actual) != len(f.sortedActual) {
+			f.sortedActual = sortFlags(f.actual)
+		}
+		flags = f.sortedActual
+	} else {
+		flags = f.orderedActual
+	}
+
+	for _, flag := range flags {
+		fn(flag)
+	}
+}
+
+// Visit visits the command-line flags in lexicographical order or
+// in primordial order if f.SortFlags is false, calling fn for each.
+// It visits only those flags that have been set.
+func Visit(fn func(*Flag)) {
+	CommandLine.Visit(fn)
+}
+
+// Lookup returns the Flag structure of the named flag, returning nil if none exists.
+func (f *FlagSet) Lookup(name string) *Flag {
+	return f.lookup(f.normalizeFlagName(name))
+}
+
+// ShorthandLookup returns the Flag structure of the short handed flag,
+// returning nil if none exists.
+// It panics, if len(name) > 1.
+func (f *FlagSet) ShorthandLookup(name string) *Flag {
+	if name == "" {
+		return nil
+	}
+	if len(name) > 1 {
+		msg := fmt.Sprintf("can not look up shorthand which is more than one ASCII character: %q", name)
+		fmt.Fprintf(f.out(), msg)
+		panic(msg)
+	}
+	c := name[0]
+	return f.shorthands[c]
+}
+
+// lookup returns the Flag structure of the named flag, returning nil if none exists.
+func (f *FlagSet) lookup(name NormalizedName) *Flag {
+	return f.formal[name]
+}
+
+// func to return a given type for a given flag name
+func (f *FlagSet) getFlagType(name string, ftype string, convFunc func(sval string) (interface{}, error)) (interface{}, error) {
+	flag := f.Lookup(name)
+	if flag == nil {
+		err := fmt.Errorf("flag accessed but not defined: %s", name)
+		return nil, err
+	}
+
+	if flag.Value.Type() != ftype {
+		err := fmt.Errorf("trying to get %s value of flag of type %s", ftype, flag.Value.Type())
+		return nil, err
+	}
+
+	sval := flag.Value.String()
+	result, err := convFunc(sval)
+	if err != nil {
+		return nil, err
+	}
+	return result, nil
+}
+
+// ArgsLenAtDash will return the length of f.Args at the moment when a -- was
+// found during arg parsing. This allows your program to know which args were
+// before the -- and which came after.
+func (f *FlagSet) ArgsLenAtDash() int {
+	return f.argsLenAtDash
+}
+
+// MarkDeprecated indicated that a flag is deprecated in your program. It will
+// continue to function but will not show up in help or usage messages. Using
+// this flag will also print the given usageMessage.
+func (f *FlagSet) MarkDeprecated(name string, usageMessage string) error {
+	flag := f.Lookup(name)
+	if flag == nil {
+		return fmt.Errorf("flag %q does not exist", name)
+	}
+	if usageMessage == "" {
+		return fmt.Errorf("deprecated message for flag %q must be set", name)
+	}
+	flag.Deprecated = usageMessage
+	flag.Hidden = true
+	return nil
+}
+
+// MarkShorthandDeprecated will mark the shorthand of a flag deprecated in your
+// program. It will continue to function but will not show up in help or usage
+// messages. Using this flag will also print the given usageMessage.
+func (f *FlagSet) MarkShorthandDeprecated(name string, usageMessage string) error {
+	flag := f.Lookup(name)
+	if flag == nil {
+		return fmt.Errorf("flag %q does not exist", name)
+	}
+	if usageMessage == "" {
+		return fmt.Errorf("deprecated message for flag %q must be set", name)
+	}
+	flag.ShorthandDeprecated = usageMessage
+	return nil
+}
+
+// MarkHidden sets a flag to 'hidden' in your program. It will continue to
+// function but will not show up in help or usage messages.
+func (f *FlagSet) MarkHidden(name string) error {
+	flag := f.Lookup(name)
+	if flag == nil {
+		return fmt.Errorf("flag %q does not exist", name)
+	}
+	flag.Hidden = true
+	return nil
+}
+
+// Lookup returns the Flag structure of the named command-line flag,
+// returning nil if none exists.
+func Lookup(name string) *Flag {
+	return CommandLine.Lookup(name)
+}
+
+// ShorthandLookup returns the Flag structure of the short handed flag,
+// returning nil if none exists.
+func ShorthandLookup(name string) *Flag {
+	return CommandLine.ShorthandLookup(name)
+}
+
+// Set sets the value of the named flag.
+func (f *FlagSet) Set(name, value string) error {
+	normalName := f.normalizeFlagName(name)
+	flag, ok := f.formal[normalName]
+	if !ok {
+		return fmt.Errorf("no such flag -%v", name)
+	}
+
+	err := flag.Value.Set(value)
+	if err != nil {
+		var flagName string
+		if flag.Shorthand != "" && flag.ShorthandDeprecated == "" {
+			flagName = fmt.Sprintf("-%s, --%s", flag.Shorthand, flag.Name)
+		} else {
+			flagName = fmt.Sprintf("--%s", flag.Name)
+		}
+		return fmt.Errorf("invalid argument %q for %q flag: %v", value, flagName, err)
+	}
+
+	if !flag.Changed {
+		if f.actual == nil {
+			f.actual = make(map[NormalizedName]*Flag)
+		}
+		f.actual[normalName] = flag
+		f.orderedActual = append(f.orderedActual, flag)
+
+		flag.Changed = true
+	}
+
+	if flag.Deprecated != "" {
+		fmt.Fprintf(f.out(), "Flag --%s has been deprecated, %s\n", flag.Name, flag.Deprecated)
+	}
+	return nil
+}
+
+// SetAnnotation allows one to set arbitrary annotations on a flag in the FlagSet.
+// This is sometimes used by spf13/cobra programs which want to generate additional
+// bash completion information.
+func (f *FlagSet) SetAnnotation(name, key string, values []string) error {
+	normalName := f.normalizeFlagName(name)
+	flag, ok := f.formal[normalName]
+	if !ok {
+		return fmt.Errorf("no such flag -%v", name)
+	}
+	if flag.Annotations == nil {
+		flag.Annotations = map[string][]string{}
+	}
+	flag.Annotations[key] = values
+	return nil
+}
+
+// Changed returns true if the flag was explicitly set during Parse() and false
+// otherwise
+func (f *FlagSet) Changed(name string) bool {
+	flag := f.Lookup(name)
+	// If a flag doesn't exist, it wasn't changed....
+	if flag == nil {
+		return false
+	}
+	return flag.Changed
+}
+
+// Set sets the value of the named command-line flag.
+func Set(name, value string) error {
+	return CommandLine.Set(name, value)
+}
+
+// PrintDefaults prints, to standard error unless configured
+// otherwise, the default values of all defined flags in the set.
+func (f *FlagSet) PrintDefaults() {
+	usages := f.FlagUsages()
+	fmt.Fprint(f.out(), usages)
+}
+
+// defaultIsZeroValue returns true if the default value for this flag represents
+// a zero value.
+func (f *Flag) defaultIsZeroValue() bool {
+	switch f.Value.(type) {
+	case boolFlag:
+		return f.DefValue == "false"
+	case *durationValue:
+		// Beginning in Go 1.7, duration zero values are "0s"
+		return f.DefValue == "0" || f.DefValue == "0s"
+	case *intValue, *int8Value, *int32Value, *int64Value, *uintValue, *uint8Value, *uint16Value, *uint32Value, *uint64Value, *countValue, *float32Value, *float64Value:
+		return f.DefValue == "0"
+	case *stringValue:
+		return f.DefValue == ""
+	case *ipValue, *ipMaskValue, *ipNetValue:
+		return f.DefValue == "<nil>"
+	case *intSliceValue, *stringSliceValue, *stringArrayValue:
+		return f.DefValue == "[]"
+	default:
+		switch f.Value.String() {
+		case "false":
+			return true
+		case "<nil>":
+			return true
+		case "":
+			return true
+		case "0":
+			return true
+		}
+		return false
+	}
+}
+
+// UnquoteUsage extracts a back-quoted name from the usage
+// string for a flag and returns it and the un-quoted usage.
+// Given "a `name` to show" it returns ("name", "a name to show").
+// If there are no back quotes, the name is an educated guess of the
+// type of the flag's value, or the empty string if the flag is boolean.
+func UnquoteUsage(flag *Flag) (name string, usage string) {
+	// Look for a back-quoted name, but avoid the strings package.
+	usage = flag.Usage
+	for i := 0; i < len(usage); i++ {
+		if usage[i] == '`' {
+			for j := i + 1; j < len(usage); j++ {
+				if usage[j] == '`' {
+					name = usage[i+1 : j]
+					usage = usage[:i] + name + usage[j+1:]
+					return name, usage
+				}
+			}
+			break // Only one back quote; use type name.
+		}
+	}
+
+	name = flag.Value.Type()
+	switch name {
+	case "bool":
+		name = ""
+	case "float64":
+		name = "float"
+	case "int64":
+		name = "int"
+	case "uint64":
+		name = "uint"
+	case "stringSlice":
+		name = "strings"
+	case "intSlice":
+		name = "ints"
+	case "uintSlice":
+		name = "uints"
+	case "boolSlice":
+		name = "bools"
+	}
+
+	return
+}
+
+// Splits the string `s` on whitespace into an initial substring up to
+// `i` runes in length and the remainder. Will go `slop` over `i` if
+// that encompasses the entire string (which allows the caller to
+// avoid short orphan words on the final line).
+func wrapN(i, slop int, s string) (string, string) {
+	if i+slop > len(s) {
+		return s, ""
+	}
+
+	w := strings.LastIndexAny(s[:i], " \t\n")
+	if w <= 0 {
+		return s, ""
+	}
+	nlPos := strings.LastIndex(s[:i], "\n")
+	if nlPos > 0 && nlPos < w {
+		return s[:nlPos], s[nlPos+1:]
+	}
+	return s[:w], s[w+1:]
+}
+
+// Wraps the string `s` to a maximum width `w` with leading indent
+// `i`. The first line is not indented (this is assumed to be done by
+// caller). Pass `w` == 0 to do no wrapping
+func wrap(i, w int, s string) string {
+	if w == 0 {
+		return strings.Replace(s, "\n", "\n"+strings.Repeat(" ", i), -1)
+	}
+
+	// space between indent i and end of line width w into which
+	// we should wrap the text.
+	wrap := w - i
+
+	var r, l string
+
+	// Not enough space for sensible wrapping. Wrap as a block on
+	// the next line instead.
+	if wrap < 24 {
+		i = 16
+		wrap = w - i
+		r += "\n" + strings.Repeat(" ", i)
+	}
+	// If still not enough space then don't even try to wrap.
+	if wrap < 24 {
+		return strings.Replace(s, "\n", r, -1)
+	}
+
+	// Try to avoid short orphan words on the final line, by
+	// allowing wrapN to go a bit over if that would fit in the
+	// remainder of the line.
+	slop := 5
+	wrap = wrap - slop
+
+	// Handle first line, which is indented by the caller (or the
+	// special case above)
+	l, s = wrapN(wrap, slop, s)
+	r = r + strings.Replace(l, "\n", "\n"+strings.Repeat(" ", i), -1)
+
+	// Now wrap the rest
+	for s != "" {
+		var t string
+
+		t, s = wrapN(wrap, slop, s)
+		r = r + "\n" + strings.Repeat(" ", i) + strings.Replace(t, "\n", "\n"+strings.Repeat(" ", i), -1)
+	}
+
+	return r
+
+}
+
+// FlagUsagesWrapped returns a string containing the usage information
+// for all flags in the FlagSet. Wrapped to `cols` columns (0 for no
+// wrapping)
+func (f *FlagSet) FlagUsagesWrapped(cols int) string {
+	buf := new(bytes.Buffer)
+
+	lines := make([]string, 0, len(f.formal))
+
+	maxlen := 0
+	f.VisitAll(func(flag *Flag) {
+		if flag.Hidden {
+			return
+		}
+
+		line := ""
+		if flag.Shorthand != "" && flag.ShorthandDeprecated == "" {
+			line = fmt.Sprintf("  -%s, --%s", flag.Shorthand, flag.Name)
+		} else {
+			line = fmt.Sprintf("      --%s", flag.Name)
+		}
+
+		varname, usage := UnquoteUsage(flag)
+		if varname != "" {
+			line += " " + varname
+		}
+		if flag.NoOptDefVal != "" {
+			switch flag.Value.Type() {
+			case "string":
+				line += fmt.Sprintf("[=\"%s\"]", flag.NoOptDefVal)
+			case "bool":
+				if flag.NoOptDefVal != "true" {
+					line += fmt.Sprintf("[=%s]", flag.NoOptDefVal)
+				}
+			case "count":
+				if flag.NoOptDefVal != "+1" {
+					line += fmt.Sprintf("[=%s]", flag.NoOptDefVal)
+				}
+			default:
+				line += fmt.Sprintf("[=%s]", flag.NoOptDefVal)
+			}
+		}
+
+		// This special character will be replaced with spacing once the
+		// correct alignment is calculated
+		line += "\x00"
+		if len(line) > maxlen {
+			maxlen = len(line)
+		}
+
+		line += usage
+		if !flag.defaultIsZeroValue() {
+			if flag.Value.Type() == "string" {
+				line += fmt.Sprintf(" (default %q)", flag.DefValue)
+			} else {
+				line += fmt.Sprintf(" (default %s)", flag.DefValue)
+			}
+		}
+		if len(flag.Deprecated) != 0 {
+			line += fmt.Sprintf(" (DEPRECATED: %s)", flag.Deprecated)
+		}
+
+		lines = append(lines, line)
+	})
+
+	for _, line := range lines {
+		sidx := strings.Index(line, "\x00")
+		spacing := strings.Repeat(" ", maxlen-sidx)
+		// maxlen + 2 comes from + 1 for the \x00 and + 1 for the (deliberate) off-by-one in maxlen-sidx
+		fmt.Fprintln(buf, line[:sidx], spacing, wrap(maxlen+2, cols, line[sidx+1:]))
+	}
+
+	return buf.String()
+}
+
+// FlagUsages returns a string containing the usage information for all flags in
+// the FlagSet
+func (f *FlagSet) FlagUsages() string {
+	return f.FlagUsagesWrapped(0)
+}
+
+// PrintDefaults prints to standard error the default values of all defined command-line flags.
+func PrintDefaults() {
+	CommandLine.PrintDefaults()
+}
+
+// defaultUsage is the default function to print a usage message.
+func defaultUsage(f *FlagSet) {
+	fmt.Fprintf(f.out(), "Usage of %s:\n", f.name)
+	f.PrintDefaults()
+}
+
+// NOTE: Usage is not just defaultUsage(CommandLine)
+// because it serves (via godoc flag Usage) as the example
+// for how to write your own usage function.
+
+// Usage prints to standard error a usage message documenting all defined command-line flags.
+// The function is a variable that may be changed to point to a custom function.
+// By default it prints a simple header and calls PrintDefaults; for details about the
+// format of the output and how to control it, see the documentation for PrintDefaults.
+var Usage = func() {
+	fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
+	PrintDefaults()
+}
+
+// NFlag returns the number of flags that have been set.
+func (f *FlagSet) NFlag() int { return len(f.actual) }
+
+// NFlag returns the number of command-line flags that have been set.
+func NFlag() int { return len(CommandLine.actual) }
+
+// Arg returns the i'th argument.  Arg(0) is the first remaining argument
+// after flags have been processed.
+func (f *FlagSet) Arg(i int) string {
+	if i < 0 || i >= len(f.args) {
+		return ""
+	}
+	return f.args[i]
+}
+
+// Arg returns the i'th command-line argument.  Arg(0) is the first remaining argument
+// after flags have been processed.
+func Arg(i int) string {
+	return CommandLine.Arg(i)
+}
+
+// NArg is the number of arguments remaining after flags have been processed.
+func (f *FlagSet) NArg() int { return len(f.args) }
+
+// NArg is the number of arguments remaining after flags have been processed.
+func NArg() int { return len(CommandLine.args) }
+
+// Args returns the non-flag arguments.
+func (f *FlagSet) Args() []string { return f.args }
+
+// Args returns the non-flag command-line arguments.
+func Args() []string { return CommandLine.args }
+
+// Var defines a flag with the specified name and usage string. The type and
+// value of the flag are represented by the first argument, of type Value, which
+// typically holds a user-defined implementation of Value. For instance, the
+// caller could create a flag that turns a comma-separated string into a slice
+// of strings by giving the slice the methods of Value; in particular, Set would
+// decompose the comma-separated string into the slice.
+func (f *FlagSet) Var(value Value, name string, usage string) {
+	f.VarP(value, name, "", usage)
+}
+
+// VarPF is like VarP, but returns the flag created
+func (f *FlagSet) VarPF(value Value, name, shorthand, usage string) *Flag {
+	// Remember the default value as a string; it won't change.
+	flag := &Flag{
+		Name:      name,
+		Shorthand: shorthand,
+		Usage:     usage,
+		Value:     value,
+		DefValue:  value.String(),
+	}
+	f.AddFlag(flag)
+	return flag
+}
+
+// VarP is like Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) VarP(value Value, name, shorthand, usage string) {
+	f.VarPF(value, name, shorthand, usage)
+}
+
+// AddFlag will add the flag to the FlagSet
+func (f *FlagSet) AddFlag(flag *Flag) {
+	normalizedFlagName := f.normalizeFlagName(flag.Name)
+
+	_, alreadyThere := f.formal[normalizedFlagName]
+	if alreadyThere {
+		msg := fmt.Sprintf("%s flag redefined: %s", f.name, flag.Name)
+		fmt.Fprintln(f.out(), msg)
+		panic(msg) // Happens only if flags are declared with identical names
+	}
+	if f.formal == nil {
+		f.formal = make(map[NormalizedName]*Flag)
+	}
+
+	flag.Name = string(normalizedFlagName)
+	f.formal[normalizedFlagName] = flag
+	f.orderedFormal = append(f.orderedFormal, flag)
+
+	if flag.Shorthand == "" {
+		return
+	}
+	if len(flag.Shorthand) > 1 {
+		msg := fmt.Sprintf("%q shorthand is more than one ASCII character", flag.Shorthand)
+		fmt.Fprintf(f.out(), msg)
+		panic(msg)
+	}
+	if f.shorthands == nil {
+		f.shorthands = make(map[byte]*Flag)
+	}
+	c := flag.Shorthand[0]
+	used, alreadyThere := f.shorthands[c]
+	if alreadyThere {
+		msg := fmt.Sprintf("unable to redefine %q shorthand in %q flagset: it's already used for %q flag", c, f.name, used.Name)
+		fmt.Fprintf(f.out(), msg)
+		panic(msg)
+	}
+	f.shorthands[c] = flag
+}
+
+// AddFlagSet adds one FlagSet to another. If a flag is already present in f
+// the flag from newSet will be ignored.
+func (f *FlagSet) AddFlagSet(newSet *FlagSet) {
+	if newSet == nil {
+		return
+	}
+	newSet.VisitAll(func(flag *Flag) {
+		if f.Lookup(flag.Name) == nil {
+			f.AddFlag(flag)
+		}
+	})
+}
+
+// Var defines a flag with the specified name and usage string. The type and
+// value of the flag are represented by the first argument, of type Value, which
+// typically holds a user-defined implementation of Value. For instance, the
+// caller could create a flag that turns a comma-separated string into a slice
+// of strings by giving the slice the methods of Value; in particular, Set would
+// decompose the comma-separated string into the slice.
+func Var(value Value, name string, usage string) {
+	CommandLine.VarP(value, name, "", usage)
+}
+
+// VarP is like Var, but accepts a shorthand letter that can be used after a single dash.
+func VarP(value Value, name, shorthand, usage string) {
+	CommandLine.VarP(value, name, shorthand, usage)
+}
+
+// failf prints to standard error a formatted error and usage message and
+// returns the error.
+func (f *FlagSet) failf(format string, a ...interface{}) error {
+	err := fmt.Errorf(format, a...)
+	if f.errorHandling != ContinueOnError {
+		fmt.Fprintln(f.out(), err)
+		f.usage()
+	}
+	return err
+}
+
+// usage calls the Usage method for the flag set, or the usage function if
+// the flag set is CommandLine.
+func (f *FlagSet) usage() {
+	if f == CommandLine {
+		Usage()
+	} else if f.Usage == nil {
+		defaultUsage(f)
+	} else {
+		f.Usage()
+	}
+}
+
+//--unknown (args will be empty)
+//--unknown --next-flag ... (args will be --next-flag ...)
+//--unknown arg ... (args will be arg ...)
+func stripUnknownFlagValue(args []string) []string {
+	if len(args) == 0 {
+		//--unknown
+		return args
+	}
+
+	first := args[0]
+	if first[0] == '-' {
+		//--unknown --next-flag ...
+		return args
+	}
+
+	//--unknown arg ... (args will be arg ...)
+	return args[1:]
+}
+
+func (f *FlagSet) parseLongArg(s string, args []string, fn parseFunc) (a []string, err error) {
+	a = args
+	name := s[2:]
+	if len(name) == 0 || name[0] == '-' || name[0] == '=' {
+		err = f.failf("bad flag syntax: %s", s)
+		return
+	}
+
+	split := strings.SplitN(name, "=", 2)
+	name = split[0]
+	flag, exists := f.formal[f.normalizeFlagName(name)]
+
+	if !exists {
+		switch {
+		case name == "help":
+			f.usage()
+			return a, ErrHelp
+		case f.ParseErrorsWhitelist.UnknownFlags:
+			// --unknown=unknownval arg ...
+			// we do not want to lose arg in this case
+			if len(split) >= 2 {
+				return a, nil
+			}
+
+			return stripUnknownFlagValue(a), nil
+		default:
+			err = f.failf("unknown flag: --%s", name)
+			return
+		}
+	}
+
+	var value string
+	if len(split) == 2 {
+		// '--flag=arg'
+		value = split[1]
+	} else if flag.NoOptDefVal != "" {
+		// '--flag' (arg was optional)
+		value = flag.NoOptDefVal
+	} else if len(a) > 0 {
+		// '--flag arg'
+		value = a[0]
+		a = a[1:]
+	} else {
+		// '--flag' (arg was required)
+		err = f.failf("flag needs an argument: %s", s)
+		return
+	}
+
+	err = fn(flag, value)
+	if err != nil {
+		f.failf(err.Error())
+	}
+	return
+}
+
+func (f *FlagSet) parseSingleShortArg(shorthands string, args []string, fn parseFunc) (outShorts string, outArgs []string, err error) {
+	if strings.HasPrefix(shorthands, "test.") {
+		return
+	}
+
+	outArgs = args
+	outShorts = shorthands[1:]
+	c := shorthands[0]
+
+	flag, exists := f.shorthands[c]
+	if !exists {
+		switch {
+		case c == 'h':
+			f.usage()
+			err = ErrHelp
+			return
+		case f.ParseErrorsWhitelist.UnknownFlags:
+			// '-f=arg arg ...'
+			// we do not want to lose arg in this case
+			if len(shorthands) > 2 && shorthands[1] == '=' {
+				outShorts = ""
+				return
+			}
+
+			outArgs = stripUnknownFlagValue(outArgs)
+			return
+		default:
+			err = f.failf("unknown shorthand flag: %q in -%s", c, shorthands)
+			return
+		}
+	}
+
+	var value string
+	if len(shorthands) > 2 && shorthands[1] == '=' {
+		// '-f=arg'
+		value = shorthands[2:]
+		outShorts = ""
+	} else if flag.NoOptDefVal != "" {
+		// '-f' (arg was optional)
+		value = flag.NoOptDefVal
+	} else if len(shorthands) > 1 {
+		// '-farg'
+		value = shorthands[1:]
+		outShorts = ""
+	} else if len(args) > 0 {
+		// '-f arg'
+		value = args[0]
+		outArgs = args[1:]
+	} else {
+		// '-f' (arg was required)
+		err = f.failf("flag needs an argument: %q in -%s", c, shorthands)
+		return
+	}
+
+	if flag.ShorthandDeprecated != "" {
+		fmt.Fprintf(f.out(), "Flag shorthand -%s has been deprecated, %s\n", flag.Shorthand, flag.ShorthandDeprecated)
+	}
+
+	err = fn(flag, value)
+	if err != nil {
+		f.failf(err.Error())
+	}
+	return
+}
+
+func (f *FlagSet) parseShortArg(s string, args []string, fn parseFunc) (a []string, err error) {
+	a = args
+	shorthands := s[1:]
+
+	// "shorthands" can be a series of shorthand letters of flags (e.g. "-vvv").
+	for len(shorthands) > 0 {
+		shorthands, a, err = f.parseSingleShortArg(shorthands, args, fn)
+		if err != nil {
+			return
+		}
+	}
+
+	return
+}
+
+func (f *FlagSet) parseArgs(args []string, fn parseFunc) (err error) {
+	for len(args) > 0 {
+		s := args[0]
+		args = args[1:]
+		if len(s) == 0 || s[0] != '-' || len(s) == 1 {
+			if !f.interspersed {
+				f.args = append(f.args, s)
+				f.args = append(f.args, args...)
+				return nil
+			}
+			f.args = append(f.args, s)
+			continue
+		}
+
+		if s[1] == '-' {
+			if len(s) == 2 { // "--" terminates the flags
+				f.argsLenAtDash = len(f.args)
+				f.args = append(f.args, args...)
+				break
+			}
+			args, err = f.parseLongArg(s, args, fn)
+		} else {
+			args, err = f.parseShortArg(s, args, fn)
+		}
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+// Parse parses flag definitions from the argument list, which should not
+// include the command name.  Must be called after all flags in the FlagSet
+// are defined and before flags are accessed by the program.
+// The return value will be ErrHelp if -help was set but not defined.
+func (f *FlagSet) Parse(arguments []string) error {
+	if f.addedGoFlagSets != nil {
+		for _, goFlagSet := range f.addedGoFlagSets {
+			goFlagSet.Parse(nil)
+		}
+	}
+	f.parsed = true
+
+	if len(arguments) < 0 {
+		return nil
+	}
+
+	f.args = make([]string, 0, len(arguments))
+
+	set := func(flag *Flag, value string) error {
+		return f.Set(flag.Name, value)
+	}
+
+	err := f.parseArgs(arguments, set)
+	if err != nil {
+		switch f.errorHandling {
+		case ContinueOnError:
+			return err
+		case ExitOnError:
+			fmt.Println(err)
+			os.Exit(2)
+		case PanicOnError:
+			panic(err)
+		}
+	}
+	return nil
+}
+
+type parseFunc func(flag *Flag, value string) error
+
+// ParseAll parses flag definitions from the argument list, which should not
+// include the command name. The arguments for fn are flag and value. Must be
+// called after all flags in the FlagSet are defined and before flags are
+// accessed by the program. The return value will be ErrHelp if -help was set
+// but not defined.
+func (f *FlagSet) ParseAll(arguments []string, fn func(flag *Flag, value string) error) error {
+	f.parsed = true
+	f.args = make([]string, 0, len(arguments))
+
+	err := f.parseArgs(arguments, fn)
+	if err != nil {
+		switch f.errorHandling {
+		case ContinueOnError:
+			return err
+		case ExitOnError:
+			os.Exit(2)
+		case PanicOnError:
+			panic(err)
+		}
+	}
+	return nil
+}
+
+// Parsed reports whether f.Parse has been called.
+func (f *FlagSet) Parsed() bool {
+	return f.parsed
+}
+
+// Parse parses the command-line flags from os.Args[1:].  Must be called
+// after all flags are defined and before flags are accessed by the program.
+func Parse() {
+	// Ignore errors; CommandLine is set for ExitOnError.
+	CommandLine.Parse(os.Args[1:])
+}
+
+// ParseAll parses the command-line flags from os.Args[1:] and called fn for each.
+// The arguments for fn are flag and value. Must be called after all flags are
+// defined and before flags are accessed by the program.
+func ParseAll(fn func(flag *Flag, value string) error) {
+	// Ignore errors; CommandLine is set for ExitOnError.
+	CommandLine.ParseAll(os.Args[1:], fn)
+}
+
+// SetInterspersed sets whether to support interspersed option/non-option arguments.
+func SetInterspersed(interspersed bool) {
+	CommandLine.SetInterspersed(interspersed)
+}
+
+// Parsed returns true if the command-line flags have been parsed.
+func Parsed() bool {
+	return CommandLine.Parsed()
+}
+
+// CommandLine is the default set of command-line flags, parsed from os.Args.
+var CommandLine = NewFlagSet(os.Args[0], ExitOnError)
+
+// NewFlagSet returns a new, empty flag set with the specified name,
+// error handling property and SortFlags set to true.
+func NewFlagSet(name string, errorHandling ErrorHandling) *FlagSet {
+	f := &FlagSet{
+		name:          name,
+		errorHandling: errorHandling,
+		argsLenAtDash: -1,
+		interspersed:  true,
+		SortFlags:     true,
+	}
+	return f
+}
+
+// SetInterspersed sets whether to support interspersed option/non-option arguments.
+func (f *FlagSet) SetInterspersed(interspersed bool) {
+	f.interspersed = interspersed
+}
+
+// Init sets the name and error handling property for a flag set.
+// By default, the zero FlagSet uses an empty name and the
+// ContinueOnError error handling policy.
+func (f *FlagSet) Init(name string, errorHandling ErrorHandling) {
+	f.name = name
+	f.errorHandling = errorHandling
+	f.argsLenAtDash = -1
+}

vendor/github.com/spf13/pflag/flag_test.go

@@ -0,0 +1,1259 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net"
+	"os"
+	"reflect"
+	"sort"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+)
+
+var (
+	testBool                     = Bool("test_bool", false, "bool value")
+	testInt                      = Int("test_int", 0, "int value")
+	testInt64                    = Int64("test_int64", 0, "int64 value")
+	testUint                     = Uint("test_uint", 0, "uint value")
+	testUint64                   = Uint64("test_uint64", 0, "uint64 value")
+	testString                   = String("test_string", "0", "string value")
+	testFloat                    = Float64("test_float64", 0, "float64 value")
+	testDuration                 = Duration("test_duration", 0, "time.Duration value")
+	testOptionalInt              = Int("test_optional_int", 0, "optional int value")
+	normalizeFlagNameInvocations = 0
+)
+
+func boolString(s string) string {
+	if s == "0" {
+		return "false"
+	}
+	return "true"
+}
+
+func TestEverything(t *testing.T) {
+	m := make(map[string]*Flag)
+	desired := "0"
+	visitor := func(f *Flag) {
+		if len(f.Name) > 5 && f.Name[0:5] == "test_" {
+			m[f.Name] = f
+			ok := false
+			switch {
+			case f.Value.String() == desired:
+				ok = true
+			case f.Name == "test_bool" && f.Value.String() == boolString(desired):
+				ok = true
+			case f.Name == "test_duration" && f.Value.String() == desired+"s":
+				ok = true
+			}
+			if !ok {
+				t.Error("Visit: bad value", f.Value.String(), "for", f.Name)
+			}
+		}
+	}
+	VisitAll(visitor)
+	if len(m) != 9 {
+		t.Error("VisitAll misses some flags")
+		for k, v := range m {
+			t.Log(k, *v)
+		}
+	}
+	m = make(map[string]*Flag)
+	Visit(visitor)
+	if len(m) != 0 {
+		t.Errorf("Visit sees unset flags")
+		for k, v := range m {
+			t.Log(k, *v)
+		}
+	}
+	// Now set all flags
+	Set("test_bool", "true")
+	Set("test_int", "1")
+	Set("test_int64", "1")
+	Set("test_uint", "1")
+	Set("test_uint64", "1")
+	Set("test_string", "1")
+	Set("test_float64", "1")
+	Set("test_duration", "1s")
+	Set("test_optional_int", "1")
+	desired = "1"
+	Visit(visitor)
+	if len(m) != 9 {
+		t.Error("Visit fails after set")
+		for k, v := range m {
+			t.Log(k, *v)
+		}
+	}
+	// Now test they're visited in sort order.
+	var flagNames []string
+	Visit(func(f *Flag) { flagNames = append(flagNames, f.Name) })
+	if !sort.StringsAreSorted(flagNames) {
+		t.Errorf("flag names not sorted: %v", flagNames)
+	}
+}
+
+func TestUsage(t *testing.T) {
+	called := false
+	ResetForTesting(func() { called = true })
+	if GetCommandLine().Parse([]string{"--x"}) == nil {
+		t.Error("parse did not fail for unknown flag")
+	}
+	if called {
+		t.Error("did call Usage while using ContinueOnError")
+	}
+}
+
+func TestAddFlagSet(t *testing.T) {
+	oldSet := NewFlagSet("old", ContinueOnError)
+	newSet := NewFlagSet("new", ContinueOnError)
+
+	oldSet.String("flag1", "flag1", "flag1")
+	oldSet.String("flag2", "flag2", "flag2")
+
+	newSet.String("flag2", "flag2", "flag2")
+	newSet.String("flag3", "flag3", "flag3")
+
+	oldSet.AddFlagSet(newSet)
+
+	if len(oldSet.formal) != 3 {
+		t.Errorf("Unexpected result adding a FlagSet to a FlagSet %v", oldSet)
+	}
+}
+
+func TestAnnotation(t *testing.T) {
+	f := NewFlagSet("shorthand", ContinueOnError)
+
+	if err := f.SetAnnotation("missing-flag", "key", nil); err == nil {
+		t.Errorf("Expected error setting annotation on non-existent flag")
+	}
+
+	f.StringP("stringa", "a", "", "string value")
+	if err := f.SetAnnotation("stringa", "key", nil); err != nil {
+		t.Errorf("Unexpected error setting new nil annotation: %v", err)
+	}
+	if annotation := f.Lookup("stringa").Annotations["key"]; annotation != nil {
+		t.Errorf("Unexpected annotation: %v", annotation)
+	}
+
+	f.StringP("stringb", "b", "", "string2 value")
+	if err := f.SetAnnotation("stringb", "key", []string{"value1"}); err != nil {
+		t.Errorf("Unexpected error setting new annotation: %v", err)
+	}
+	if annotation := f.Lookup("stringb").Annotations["key"]; !reflect.DeepEqual(annotation, []string{"value1"}) {
+		t.Errorf("Unexpected annotation: %v", annotation)
+	}
+
+	if err := f.SetAnnotation("stringb", "key", []string{"value2"}); err != nil {
+		t.Errorf("Unexpected error updating annotation: %v", err)
+	}
+	if annotation := f.Lookup("stringb").Annotations["key"]; !reflect.DeepEqual(annotation, []string{"value2"}) {
+		t.Errorf("Unexpected annotation: %v", annotation)
+	}
+}
+
+func testParse(f *FlagSet, t *testing.T) {
+	if f.Parsed() {
+		t.Error("f.Parse() = true before Parse")
+	}
+	boolFlag := f.Bool("bool", false, "bool value")
+	bool2Flag := f.Bool("bool2", false, "bool2 value")
+	bool3Flag := f.Bool("bool3", false, "bool3 value")
+	intFlag := f.Int("int", 0, "int value")
+	int8Flag := f.Int8("int8", 0, "int value")
+	int16Flag := f.Int16("int16", 0, "int value")
+	int32Flag := f.Int32("int32", 0, "int value")
+	int64Flag := f.Int64("int64", 0, "int64 value")
+	uintFlag := f.Uint("uint", 0, "uint value")
+	uint8Flag := f.Uint8("uint8", 0, "uint value")
+	uint16Flag := f.Uint16("uint16", 0, "uint value")
+	uint32Flag := f.Uint32("uint32", 0, "uint value")
+	uint64Flag := f.Uint64("uint64", 0, "uint64 value")
+	stringFlag := f.String("string", "0", "string value")
+	float32Flag := f.Float32("float32", 0, "float32 value")
+	float64Flag := f.Float64("float64", 0, "float64 value")
+	ipFlag := f.IP("ip", net.ParseIP("127.0.0.1"), "ip value")
+	maskFlag := f.IPMask("mask", ParseIPv4Mask("0.0.0.0"), "mask value")
+	durationFlag := f.Duration("duration", 5*time.Second, "time.Duration value")
+	optionalIntNoValueFlag := f.Int("optional-int-no-value", 0, "int value")
+	f.Lookup("optional-int-no-value").NoOptDefVal = "9"
+	optionalIntWithValueFlag := f.Int("optional-int-with-value", 0, "int value")
+	f.Lookup("optional-int-no-value").NoOptDefVal = "9"
+	extra := "one-extra-argument"
+	args := []string{
+		"--bool",
+		"--bool2=true",
+		"--bool3=false",
+		"--int=22",
+		"--int8=-8",
+		"--int16=-16",
+		"--int32=-32",
+		"--int64=0x23",
+		"--uint", "24",
+		"--uint8=8",
+		"--uint16=16",
+		"--uint32=32",
+		"--uint64=25",
+		"--string=hello",
+		"--float32=-172e12",
+		"--float64=2718e28",
+		"--ip=10.11.12.13",
+		"--mask=255.255.255.0",
+		"--duration=2m",
+		"--optional-int-no-value",
+		"--optional-int-with-value=42",
+		extra,
+	}
+	if err := f.Parse(args); err != nil {
+		t.Fatal(err)
+	}
+	if !f.Parsed() {
+		t.Error("f.Parse() = false after Parse")
+	}
+	if *boolFlag != true {
+		t.Error("bool flag should be true, is ", *boolFlag)
+	}
+	if v, err := f.GetBool("bool"); err != nil || v != *boolFlag {
+		t.Error("GetBool does not work.")
+	}
+	if *bool2Flag != true {
+		t.Error("bool2 flag should be true, is ", *bool2Flag)
+	}
+	if *bool3Flag != false {
+		t.Error("bool3 flag should be false, is ", *bool2Flag)
+	}
+	if *intFlag != 22 {
+		t.Error("int flag should be 22, is ", *intFlag)
+	}
+	if v, err := f.GetInt("int"); err != nil || v != *intFlag {
+		t.Error("GetInt does not work.")
+	}
+	if *int8Flag != -8 {
+		t.Error("int8 flag should be 0x23, is ", *int8Flag)
+	}
+	if *int16Flag != -16 {
+		t.Error("int16 flag should be -16, is ", *int16Flag)
+	}
+	if v, err := f.GetInt8("int8"); err != nil || v != *int8Flag {
+		t.Error("GetInt8 does not work.")
+	}
+	if v, err := f.GetInt16("int16"); err != nil || v != *int16Flag {
+		t.Error("GetInt16 does not work.")
+	}
+	if *int32Flag != -32 {
+		t.Error("int32 flag should be 0x23, is ", *int32Flag)
+	}
+	if v, err := f.GetInt32("int32"); err != nil || v != *int32Flag {
+		t.Error("GetInt32 does not work.")
+	}
+	if *int64Flag != 0x23 {
+		t.Error("int64 flag should be 0x23, is ", *int64Flag)
+	}
+	if v, err := f.GetInt64("int64"); err != nil || v != *int64Flag {
+		t.Error("GetInt64 does not work.")
+	}
+	if *uintFlag != 24 {
+		t.Error("uint flag should be 24, is ", *uintFlag)
+	}
+	if v, err := f.GetUint("uint"); err != nil || v != *uintFlag {
+		t.Error("GetUint does not work.")
+	}
+	if *uint8Flag != 8 {
+		t.Error("uint8 flag should be 8, is ", *uint8Flag)
+	}
+	if v, err := f.GetUint8("uint8"); err != nil || v != *uint8Flag {
+		t.Error("GetUint8 does not work.")
+	}
+	if *uint16Flag != 16 {
+		t.Error("uint16 flag should be 16, is ", *uint16Flag)
+	}
+	if v, err := f.GetUint16("uint16"); err != nil || v != *uint16Flag {
+		t.Error("GetUint16 does not work.")
+	}
+	if *uint32Flag != 32 {
+		t.Error("uint32 flag should be 32, is ", *uint32Flag)
+	}
+	if v, err := f.GetUint32("uint32"); err != nil || v != *uint32Flag {
+		t.Error("GetUint32 does not work.")
+	}
+	if *uint64Flag != 25 {
+		t.Error("uint64 flag should be 25, is ", *uint64Flag)
+	}
+	if v, err := f.GetUint64("uint64"); err != nil || v != *uint64Flag {
+		t.Error("GetUint64 does not work.")
+	}
+	if *stringFlag != "hello" {
+		t.Error("string flag should be `hello`, is ", *stringFlag)
+	}
+	if v, err := f.GetString("string"); err != nil || v != *stringFlag {
+		t.Error("GetString does not work.")
+	}
+	if *float32Flag != -172e12 {
+		t.Error("float32 flag should be -172e12, is ", *float32Flag)
+	}
+	if v, err := f.GetFloat32("float32"); err != nil || v != *float32Flag {
+		t.Errorf("GetFloat32 returned %v but float32Flag was %v", v, *float32Flag)
+	}
+	if *float64Flag != 2718e28 {
+		t.Error("float64 flag should be 2718e28, is ", *float64Flag)
+	}
+	if v, err := f.GetFloat64("float64"); err != nil || v != *float64Flag {
+		t.Errorf("GetFloat64 returned %v but float64Flag was %v", v, *float64Flag)
+	}
+	if !(*ipFlag).Equal(net.ParseIP("10.11.12.13")) {
+		t.Error("ip flag should be 10.11.12.13, is ", *ipFlag)
+	}
+	if v, err := f.GetIP("ip"); err != nil || !v.Equal(*ipFlag) {
+		t.Errorf("GetIP returned %v but ipFlag was %v", v, *ipFlag)
+	}
+	if (*maskFlag).String() != ParseIPv4Mask("255.255.255.0").String() {
+		t.Error("mask flag should be 255.255.255.0, is ", (*maskFlag).String())
+	}
+	if v, err := f.GetIPv4Mask("mask"); err != nil || v.String() != (*maskFlag).String() {
+		t.Errorf("GetIP returned %v maskFlag was %v error was %v", v, *maskFlag, err)
+	}
+	if *durationFlag != 2*time.Minute {
+		t.Error("duration flag should be 2m, is ", *durationFlag)
+	}
+	if v, err := f.GetDuration("duration"); err != nil || v != *durationFlag {
+		t.Error("GetDuration does not work.")
+	}
+	if _, err := f.GetInt("duration"); err == nil {
+		t.Error("GetInt parsed a time.Duration?!?!")
+	}
+	if *optionalIntNoValueFlag != 9 {
+		t.Error("optional int flag should be the default value, is ", *optionalIntNoValueFlag)
+	}
+	if *optionalIntWithValueFlag != 42 {
+		t.Error("optional int flag should be 42, is ", *optionalIntWithValueFlag)
+	}
+	if len(f.Args()) != 1 {
+		t.Error("expected one argument, got", len(f.Args()))
+	} else if f.Args()[0] != extra {
+		t.Errorf("expected argument %q got %q", extra, f.Args()[0])
+	}
+}
+
+func testParseAll(f *FlagSet, t *testing.T) {
+	if f.Parsed() {
+		t.Error("f.Parse() = true before Parse")
+	}
+	f.BoolP("boola", "a", false, "bool value")
+	f.BoolP("boolb", "b", false, "bool2 value")
+	f.BoolP("boolc", "c", false, "bool3 value")
+	f.BoolP("boold", "d", false, "bool4 value")
+	f.StringP("stringa", "s", "0", "string value")
+	f.StringP("stringz", "z", "0", "string value")
+	f.StringP("stringx", "x", "0", "string value")
+	f.StringP("stringy", "y", "0", "string value")
+	f.Lookup("stringx").NoOptDefVal = "1"
+	args := []string{
+		"-ab",
+		"-cs=xx",
+		"--stringz=something",
+		"-d=true",
+		"-x",
+		"-y",
+		"ee",
+	}
+	want := []string{
+		"boola", "true",
+		"boolb", "true",
+		"boolc", "true",
+		"stringa", "xx",
+		"stringz", "something",
+		"boold", "true",
+		"stringx", "1",
+		"stringy", "ee",
+	}
+	got := []string{}
+	store := func(flag *Flag, value string) error {
+		got = append(got, flag.Name)
+		if len(value) > 0 {
+			got = append(got, value)
+		}
+		return nil
+	}
+	if err := f.ParseAll(args, store); err != nil {
+		t.Errorf("expected no error, got %s", err)
+	}
+	if !f.Parsed() {
+		t.Errorf("f.Parse() = false after Parse")
+	}
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("f.ParseAll() fail to restore the args")
+		t.Errorf("Got:  %v", got)
+		t.Errorf("Want: %v", want)
+	}
+}
+
+func testParseWithUnknownFlags(f *FlagSet, t *testing.T) {
+	if f.Parsed() {
+		t.Error("f.Parse() = true before Parse")
+	}
+	f.ParseErrorsWhitelist.UnknownFlags = true
+
+	f.BoolP("boola", "a", false, "bool value")
+	f.BoolP("boolb", "b", false, "bool2 value")
+	f.BoolP("boolc", "c", false, "bool3 value")
+	f.BoolP("boold", "d", false, "bool4 value")
+	f.BoolP("boole", "e", false, "bool4 value")
+	f.StringP("stringa", "s", "0", "string value")
+	f.StringP("stringz", "z", "0", "string value")
+	f.StringP("stringx", "x", "0", "string value")
+	f.StringP("stringy", "y", "0", "string value")
+	f.StringP("stringo", "o", "0", "string value")
+	f.Lookup("stringx").NoOptDefVal = "1"
+	args := []string{
+		"-ab",
+		"-cs=xx",
+		"--stringz=something",
+		"--unknown1",
+		"unknown1Value",
+		"-d=true",
+		"-x",
+		"--unknown2=unknown2Value",
+		"-u=unknown3Value",
+		"-p",
+		"unknown4Value",
+		"-q", //another unknown with bool value
+		"-y",
+		"ee",
+		"--unknown7=unknown7value",
+		"--stringo=ovalue",
+		"--unknown8=unknown8value",
+		"--boole",
+		"--unknown6",
+	}
+	want := []string{
+		"boola", "true",
+		"boolb", "true",
+		"boolc", "true",
+		"stringa", "xx",
+		"stringz", "something",
+		"boold", "true",
+		"stringx", "1",
+		"stringy", "ee",
+		"stringo", "ovalue",
+		"boole", "true",
+	}
+	got := []string{}
+	store := func(flag *Flag, value string) error {
+		got = append(got, flag.Name)
+		if len(value) > 0 {
+			got = append(got, value)
+		}
+		return nil
+	}
+	if err := f.ParseAll(args, store); err != nil {
+		t.Errorf("expected no error, got %s", err)
+	}
+	if !f.Parsed() {
+		t.Errorf("f.Parse() = false after Parse")
+	}
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("f.ParseAll() fail to restore the args")
+		t.Errorf("Got:  %v", got)
+		t.Errorf("Want: %v", want)
+	}
+}
+
+func TestShorthand(t *testing.T) {
+	f := NewFlagSet("shorthand", ContinueOnError)
+	if f.Parsed() {
+		t.Error("f.Parse() = true before Parse")
+	}
+	boolaFlag := f.BoolP("boola", "a", false, "bool value")
+	boolbFlag := f.BoolP("boolb", "b", false, "bool2 value")
+	boolcFlag := f.BoolP("boolc", "c", false, "bool3 value")
+	booldFlag := f.BoolP("boold", "d", false, "bool4 value")
+	stringaFlag := f.StringP("stringa", "s", "0", "string value")
+	stringzFlag := f.StringP("stringz", "z", "0", "string value")
+	extra := "interspersed-argument"
+	notaflag := "--i-look-like-a-flag"
+	args := []string{
+		"-ab",
+		extra,
+		"-cs",
+		"hello",
+		"-z=something",
+		"-d=true",
+		"--",
+		notaflag,
+	}
+	f.SetOutput(ioutil.Discard)
+	if err := f.Parse(args); err != nil {
+		t.Error("expected no error, got ", err)
+	}
+	if !f.Parsed() {
+		t.Error("f.Parse() = false after Parse")
+	}
+	if *boolaFlag != true {
+		t.Error("boola flag should be true, is ", *boolaFlag)
+	}
+	if *boolbFlag != true {
+		t.Error("boolb flag should be true, is ", *boolbFlag)
+	}
+	if *boolcFlag != true {
+		t.Error("boolc flag should be true, is ", *boolcFlag)
+	}
+	if *booldFlag != true {
+		t.Error("boold flag should be true, is ", *booldFlag)
+	}
+	if *stringaFlag != "hello" {
+		t.Error("stringa flag should be `hello`, is ", *stringaFlag)
+	}
+	if *stringzFlag != "something" {
+		t.Error("stringz flag should be `something`, is ", *stringzFlag)
+	}
+	if len(f.Args()) != 2 {
+		t.Error("expected one argument, got", len(f.Args()))
+	} else if f.Args()[0] != extra {
+		t.Errorf("expected argument %q got %q", extra, f.Args()[0])
+	} else if f.Args()[1] != notaflag {
+		t.Errorf("expected argument %q got %q", notaflag, f.Args()[1])
+	}
+	if f.ArgsLenAtDash() != 1 {
+		t.Errorf("expected argsLenAtDash %d got %d", f.ArgsLenAtDash(), 1)
+	}
+}
+
+func TestShorthandLookup(t *testing.T) {
+	f := NewFlagSet("shorthand", ContinueOnError)
+	if f.Parsed() {
+		t.Error("f.Parse() = true before Parse")
+	}
+	f.BoolP("boola", "a", false, "bool value")
+	f.BoolP("boolb", "b", false, "bool2 value")
+	args := []string{
+		"-ab",
+	}
+	f.SetOutput(ioutil.Discard)
+	if err := f.Parse(args); err != nil {
+		t.Error("expected no error, got ", err)
+	}
+	if !f.Parsed() {
+		t.Error("f.Parse() = false after Parse")
+	}
+	flag := f.ShorthandLookup("a")
+	if flag == nil {
+		t.Errorf("f.ShorthandLookup(\"a\") returned nil")
+	}
+	if flag.Name != "boola" {
+		t.Errorf("f.ShorthandLookup(\"a\") found %q instead of \"boola\"", flag.Name)
+	}
+	flag = f.ShorthandLookup("")
+	if flag != nil {
+		t.Errorf("f.ShorthandLookup(\"\") did not return nil")
+	}
+	defer func() {
+		recover()
+	}()
+	flag = f.ShorthandLookup("ab")
+	// should NEVER get here. lookup should panic. defer'd func should recover it.
+	t.Errorf("f.ShorthandLookup(\"ab\") did not panic")
+}
+
+func TestParse(t *testing.T) {
+	ResetForTesting(func() { t.Error("bad parse") })
+	testParse(GetCommandLine(), t)
+}
+
+func TestParseAll(t *testing.T) {
+	ResetForTesting(func() { t.Error("bad parse") })
+	testParseAll(GetCommandLine(), t)
+}
+
+func TestIgnoreUnknownFlags(t *testing.T) {
+	ResetForTesting(func() { t.Error("bad parse") })
+	testParseWithUnknownFlags(GetCommandLine(), t)
+}
+
+func TestFlagSetParse(t *testing.T) {
+	testParse(NewFlagSet("test", ContinueOnError), t)
+}
+
+func TestChangedHelper(t *testing.T) {
+	f := NewFlagSet("changedtest", ContinueOnError)
+	f.Bool("changed", false, "changed bool")
+	f.Bool("settrue", true, "true to true")
+	f.Bool("setfalse", false, "false to false")
+	f.Bool("unchanged", false, "unchanged bool")
+
+	args := []string{"--changed", "--settrue", "--setfalse=false"}
+	if err := f.Parse(args); err != nil {
+		t.Error("f.Parse() = false after Parse")
+	}
+	if !f.Changed("changed") {
+		t.Errorf("--changed wasn't changed!")
+	}
+	if !f.Changed("settrue") {
+		t.Errorf("--settrue wasn't changed!")
+	}
+	if !f.Changed("setfalse") {
+		t.Errorf("--setfalse wasn't changed!")
+	}
+	if f.Changed("unchanged") {
+		t.Errorf("--unchanged was changed!")
+	}
+	if f.Changed("invalid") {
+		t.Errorf("--invalid was changed!")
+	}
+	if f.ArgsLenAtDash() != -1 {
+		t.Errorf("Expected argsLenAtDash: %d but got %d", -1, f.ArgsLenAtDash())
+	}
+}
+
+func replaceSeparators(name string, from []string, to string) string {
+	result := name
+	for _, sep := range from {
+		result = strings.Replace(result, sep, to, -1)
+	}
+	// Type convert to indicate normalization has been done.
+	return result
+}
+
+func wordSepNormalizeFunc(f *FlagSet, name string) NormalizedName {
+	seps := []string{"-", "_"}
+	name = replaceSeparators(name, seps, ".")
+	normalizeFlagNameInvocations++
+
+	return NormalizedName(name)
+}
+
+func testWordSepNormalizedNames(args []string, t *testing.T) {
+	f := NewFlagSet("normalized", ContinueOnError)
+	if f.Parsed() {
+		t.Error("f.Parse() = true before Parse")
+	}
+	withDashFlag := f.Bool("with-dash-flag", false, "bool value")
+	// Set this after some flags have been added and before others.
+	f.SetNormalizeFunc(wordSepNormalizeFunc)
+	withUnderFlag := f.Bool("with_under_flag", false, "bool value")
+	withBothFlag := f.Bool("with-both_flag", false, "bool value")
+	if err := f.Parse(args); err != nil {
+		t.Fatal(err)
+	}
+	if !f.Parsed() {
+		t.Error("f.Parse() = false after Parse")
+	}
+	if *withDashFlag != true {
+		t.Error("withDashFlag flag should be true, is ", *withDashFlag)
+	}
+	if *withUnderFlag != true {
+		t.Error("withUnderFlag flag should be true, is ", *withUnderFlag)
+	}
+	if *withBothFlag != true {
+		t.Error("withBothFlag flag should be true, is ", *withBothFlag)
+	}
+}
+
+func TestWordSepNormalizedNames(t *testing.T) {
+	args := []string{
+		"--with-dash-flag",
+		"--with-under-flag",
+		"--with-both-flag",
+	}
+	testWordSepNormalizedNames(args, t)
+
+	args = []string{
+		"--with_dash_flag",
+		"--with_under_flag",
+		"--with_both_flag",
+	}
+	testWordSepNormalizedNames(args, t)
+
+	args = []string{
+		"--with-dash_flag",
+		"--with-under_flag",
+		"--with-both_flag",
+	}
+	testWordSepNormalizedNames(args, t)
+}
+
+func aliasAndWordSepFlagNames(f *FlagSet, name string) NormalizedName {
+	seps := []string{"-", "_"}
+
+	oldName := replaceSeparators("old-valid_flag", seps, ".")
+	newName := replaceSeparators("valid-flag", seps, ".")
+
+	name = replaceSeparators(name, seps, ".")
+	switch name {
+	case oldName:
+		name = newName
+	}
+
+	return NormalizedName(name)
+}
+
+func TestCustomNormalizedNames(t *testing.T) {
+	f := NewFlagSet("normalized", ContinueOnError)
+	if f.Parsed() {
+		t.Error("f.Parse() = true before Parse")
+	}
+
+	validFlag := f.Bool("valid-flag", false, "bool value")
+	f.SetNormalizeFunc(aliasAndWordSepFlagNames)
+	someOtherFlag := f.Bool("some-other-flag", false, "bool value")
+
+	args := []string{"--old_valid_flag", "--some-other_flag"}
+	if err := f.Parse(args); err != nil {
+		t.Fatal(err)
+	}
+
+	if *validFlag != true {
+		t.Errorf("validFlag is %v even though we set the alias --old_valid_falg", *validFlag)
+	}
+	if *someOtherFlag != true {
+		t.Error("someOtherFlag should be true, is ", *someOtherFlag)
+	}
+}
+
+// Every flag we add, the name (displayed also in usage) should normalized
+func TestNormalizationFuncShouldChangeFlagName(t *testing.T) {
+	// Test normalization after addition
+	f := NewFlagSet("normalized", ContinueOnError)
+
+	f.Bool("valid_flag", false, "bool value")
+	if f.Lookup("valid_flag").Name != "valid_flag" {
+		t.Error("The new flag should have the name 'valid_flag' instead of ", f.Lookup("valid_flag").Name)
+	}
+
+	f.SetNormalizeFunc(wordSepNormalizeFunc)
+	if f.Lookup("valid_flag").Name != "valid.flag" {
+		t.Error("The new flag should have the name 'valid.flag' instead of ", f.Lookup("valid_flag").Name)
+	}
+
+	// Test normalization before addition
+	f = NewFlagSet("normalized", ContinueOnError)
+	f.SetNormalizeFunc(wordSepNormalizeFunc)
+
+	f.Bool("valid_flag", false, "bool value")
+	if f.Lookup("valid_flag").Name != "valid.flag" {
+		t.Error("The new flag should have the name 'valid.flag' instead of ", f.Lookup("valid_flag").Name)
+	}
+}
+
+// Related to https://github.com/spf13/cobra/issues/521.
+func TestNormalizationSharedFlags(t *testing.T) {
+	f := NewFlagSet("set f", ContinueOnError)
+	g := NewFlagSet("set g", ContinueOnError)
+	nfunc := wordSepNormalizeFunc
+	testName := "valid_flag"
+	normName := nfunc(nil, testName)
+	if testName == string(normName) {
+		t.Error("TestNormalizationSharedFlags meaningless: the original and normalized flag names are identical:", testName)
+	}
+
+	f.Bool(testName, false, "bool value")
+	g.AddFlagSet(f)
+
+	f.SetNormalizeFunc(nfunc)
+	g.SetNormalizeFunc(nfunc)
+
+	if len(f.formal) != 1 {
+		t.Error("Normalizing flags should not result in duplications in the flag set:", f.formal)
+	}
+	if f.orderedFormal[0].Name != string(normName) {
+		t.Error("Flag name not normalized")
+	}
+	for k := range f.formal {
+		if k != "valid.flag" {
+			t.Errorf("The key in the flag map should have been normalized: wanted \"%s\", got \"%s\" instead", normName, k)
+		}
+	}
+
+	if !reflect.DeepEqual(f.formal, g.formal) || !reflect.DeepEqual(f.orderedFormal, g.orderedFormal) {
+		t.Error("Two flag sets sharing the same flags should stay consistent after being normalized. Original set:", f.formal, "Duplicate set:", g.formal)
+	}
+}
+
+func TestNormalizationSetFlags(t *testing.T) {
+	f := NewFlagSet("normalized", ContinueOnError)
+	nfunc := wordSepNormalizeFunc
+	testName := "valid_flag"
+	normName := nfunc(nil, testName)
+	if testName == string(normName) {
+		t.Error("TestNormalizationSetFlags meaningless: the original and normalized flag names are identical:", testName)
+	}
+
+	f.Bool(testName, false, "bool value")
+	f.Set(testName, "true")
+	f.SetNormalizeFunc(nfunc)
+
+	if len(f.formal) != 1 {
+		t.Error("Normalizing flags should not result in duplications in the flag set:", f.formal)
+	}
+	if f.orderedFormal[0].Name != string(normName) {
+		t.Error("Flag name not normalized")
+	}
+	for k := range f.formal {
+		if k != "valid.flag" {
+			t.Errorf("The key in the flag map should have been normalized: wanted \"%s\", got \"%s\" instead", normName, k)
+		}
+	}
+
+	if !reflect.DeepEqual(f.formal, f.actual) {
+		t.Error("The map of set flags should get normalized. Formal:", f.formal, "Actual:", f.actual)
+	}
+}
+
+// Declare a user-defined flag type.
+type flagVar []string
+
+func (f *flagVar) String() string {
+	return fmt.Sprint([]string(*f))
+}
+
+func (f *flagVar) Set(value string) error {
+	*f = append(*f, value)
+	return nil
+}
+
+func (f *flagVar) Type() string {
+	return "flagVar"
+}
+
+func TestUserDefined(t *testing.T) {
+	var flags FlagSet
+	flags.Init("test", ContinueOnError)
+	var v flagVar
+	flags.VarP(&v, "v", "v", "usage")
+	if err := flags.Parse([]string{"--v=1", "-v2", "-v", "3"}); err != nil {
+		t.Error(err)
+	}
+	if len(v) != 3 {
+		t.Fatal("expected 3 args; got ", len(v))
+	}
+	expect := "[1 2 3]"
+	if v.String() != expect {
+		t.Errorf("expected value %q got %q", expect, v.String())
+	}
+}
+
+func TestSetOutput(t *testing.T) {
+	var flags FlagSet
+	var buf bytes.Buffer
+	flags.SetOutput(&buf)
+	flags.Init("test", ContinueOnError)
+	flags.Parse([]string{"--unknown"})
+	if out := buf.String(); !strings.Contains(out, "--unknown") {
+		t.Logf("expected output mentioning unknown; got %q", out)
+	}
+}
+
+// This tests that one can reset the flags. This still works but not well, and is
+// superseded by FlagSet.
+func TestChangingArgs(t *testing.T) {
+	ResetForTesting(func() { t.Fatal("bad parse") })
+	oldArgs := os.Args
+	defer func() { os.Args = oldArgs }()
+	os.Args = []string{"cmd", "--before", "subcmd"}
+	before := Bool("before", false, "")
+	if err := GetCommandLine().Parse(os.Args[1:]); err != nil {
+		t.Fatal(err)
+	}
+	cmd := Arg(0)
+	os.Args = []string{"subcmd", "--after", "args"}
+	after := Bool("after", false, "")
+	Parse()
+	args := Args()
+
+	if !*before || cmd != "subcmd" || !*after || len(args) != 1 || args[0] != "args" {
+		t.Fatalf("expected true subcmd true [args] got %v %v %v %v", *before, cmd, *after, args)
+	}
+}
+
+// Test that -help invokes the usage message and returns ErrHelp.
+func TestHelp(t *testing.T) {
+	var helpCalled = false
+	fs := NewFlagSet("help test", ContinueOnError)
+	fs.Usage = func() { helpCalled = true }
+	var flag bool
+	fs.BoolVar(&flag, "flag", false, "regular flag")
+	// Regular flag invocation should work
+	err := fs.Parse([]string{"--flag=true"})
+	if err != nil {
+		t.Fatal("expected no error; got ", err)
+	}
+	if !flag {
+		t.Error("flag was not set by --flag")
+	}
+	if helpCalled {
+		t.Error("help called for regular flag")
+		helpCalled = false // reset for next test
+	}
+	// Help flag should work as expected.
+	err = fs.Parse([]string{"--help"})
+	if err == nil {
+		t.Fatal("error expected")
+	}
+	if err != ErrHelp {
+		t.Fatal("expected ErrHelp; got ", err)
+	}
+	if !helpCalled {
+		t.Fatal("help was not called")
+	}
+	// If we define a help flag, that should override.
+	var help bool
+	fs.BoolVar(&help, "help", false, "help flag")
+	helpCalled = false
+	err = fs.Parse([]string{"--help"})
+	if err != nil {
+		t.Fatal("expected no error for defined --help; got ", err)
+	}
+	if helpCalled {
+		t.Fatal("help was called; should not have been for defined help flag")
+	}
+}
+
+func TestNoInterspersed(t *testing.T) {
+	f := NewFlagSet("test", ContinueOnError)
+	f.SetInterspersed(false)
+	f.Bool("true", true, "always true")
+	f.Bool("false", false, "always false")
+	err := f.Parse([]string{"--true", "break", "--false"})
+	if err != nil {
+		t.Fatal("expected no error; got ", err)
+	}
+	args := f.Args()
+	if len(args) != 2 || args[0] != "break" || args[1] != "--false" {
+		t.Fatal("expected interspersed options/non-options to fail")
+	}
+}
+
+func TestTermination(t *testing.T) {
+	f := NewFlagSet("termination", ContinueOnError)
+	boolFlag := f.BoolP("bool", "l", false, "bool value")
+	if f.Parsed() {
+		t.Error("f.Parse() = true before Parse")
+	}
+	arg1 := "ls"
+	arg2 := "-l"
+	args := []string{
+		"--",
+		arg1,
+		arg2,
+	}
+	f.SetOutput(ioutil.Discard)
+	if err := f.Parse(args); err != nil {
+		t.Fatal("expected no error; got ", err)
+	}
+	if !f.Parsed() {
+		t.Error("f.Parse() = false after Parse")
+	}
+	if *boolFlag {
+		t.Error("expected boolFlag=false, got true")
+	}
+	if len(f.Args()) != 2 {
+		t.Errorf("expected 2 arguments, got %d: %v", len(f.Args()), f.Args())
+	}
+	if f.Args()[0] != arg1 {
+		t.Errorf("expected argument %q got %q", arg1, f.Args()[0])
+	}
+	if f.Args()[1] != arg2 {
+		t.Errorf("expected argument %q got %q", arg2, f.Args()[1])
+	}
+	if f.ArgsLenAtDash() != 0 {
+		t.Errorf("expected argsLenAtDash %d got %d", 0, f.ArgsLenAtDash())
+	}
+}
+
+func getDeprecatedFlagSet() *FlagSet {
+	f := NewFlagSet("bob", ContinueOnError)
+	f.Bool("badflag", true, "always true")
+	f.MarkDeprecated("badflag", "use --good-flag instead")
+	return f
+}
+func TestDeprecatedFlagInDocs(t *testing.T) {
+	f := getDeprecatedFlagSet()
+
+	out := new(bytes.Buffer)
+	f.SetOutput(out)
+	f.PrintDefaults()
+
+	if strings.Contains(out.String(), "badflag") {
+		t.Errorf("found deprecated flag in usage!")
+	}
+}
+
+func TestUnHiddenDeprecatedFlagInDocs(t *testing.T) {
+	f := getDeprecatedFlagSet()
+	flg := f.Lookup("badflag")
+	if flg == nil {
+		t.Fatalf("Unable to lookup 'bob' in TestUnHiddenDeprecatedFlagInDocs")
+	}
+	flg.Hidden = false
+
+	out := new(bytes.Buffer)
+	f.SetOutput(out)
+	f.PrintDefaults()
+
+	defaults := out.String()
+	if !strings.Contains(defaults, "badflag") {
+		t.Errorf("Did not find deprecated flag in usage!")
+	}
+	if !strings.Contains(defaults, "use --good-flag instead") {
+		t.Errorf("Did not find 'use --good-flag instead' in defaults")
+	}
+}
+
+func TestDeprecatedFlagShorthandInDocs(t *testing.T) {
+	f := NewFlagSet("bob", ContinueOnError)
+	name := "noshorthandflag"
+	f.BoolP(name, "n", true, "always true")
+	f.MarkShorthandDeprecated("noshorthandflag", fmt.Sprintf("use --%s instead", name))
+
+	out := new(bytes.Buffer)
+	f.SetOutput(out)
+	f.PrintDefaults()
+
+	if strings.Contains(out.String(), "-n,") {
+		t.Errorf("found deprecated flag shorthand in usage!")
+	}
+}
+
+func parseReturnStderr(t *testing.T, f *FlagSet, args []string) (string, error) {
+	oldStderr := os.Stderr
+	r, w, _ := os.Pipe()
+	os.Stderr = w
+
+	err := f.Parse(args)
+
+	outC := make(chan string)
+	// copy the output in a separate goroutine so printing can't block indefinitely
+	go func() {
+		var buf bytes.Buffer
+		io.Copy(&buf, r)
+		outC <- buf.String()
+	}()
+
+	w.Close()
+	os.Stderr = oldStderr
+	out := <-outC
+
+	return out, err
+}
+
+func TestDeprecatedFlagUsage(t *testing.T) {
+	f := NewFlagSet("bob", ContinueOnError)
+	f.Bool("badflag", true, "always true")
+	usageMsg := "use --good-flag instead"
+	f.MarkDeprecated("badflag", usageMsg)
+
+	args := []string{"--badflag"}
+	out, err := parseReturnStderr(t, f, args)
+	if err != nil {
+		t.Fatal("expected no error; got ", err)
+	}
+
+	if !strings.Contains(out, usageMsg) {
+		t.Errorf("usageMsg not printed when using a deprecated flag!")
+	}
+}
+
+func TestDeprecatedFlagShorthandUsage(t *testing.T) {
+	f := NewFlagSet("bob", ContinueOnError)
+	name := "noshorthandflag"
+	f.BoolP(name, "n", true, "always true")
+	usageMsg := fmt.Sprintf("use --%s instead", name)
+	f.MarkShorthandDeprecated(name, usageMsg)
+
+	args := []string{"-n"}
+	out, err := parseReturnStderr(t, f, args)
+	if err != nil {
+		t.Fatal("expected no error; got ", err)
+	}
+
+	if !strings.Contains(out, usageMsg) {
+		t.Errorf("usageMsg not printed when using a deprecated flag!")
+	}
+}
+
+func TestDeprecatedFlagUsageNormalized(t *testing.T) {
+	f := NewFlagSet("bob", ContinueOnError)
+	f.Bool("bad-double_flag", true, "always true")
+	f.SetNormalizeFunc(wordSepNormalizeFunc)
+	usageMsg := "use --good-flag instead"
+	f.MarkDeprecated("bad_double-flag", usageMsg)
+
+	args := []string{"--bad_double_flag"}
+	out, err := parseReturnStderr(t, f, args)
+	if err != nil {
+		t.Fatal("expected no error; got ", err)
+	}
+
+	if !strings.Contains(out, usageMsg) {
+		t.Errorf("usageMsg not printed when using a deprecated flag!")
+	}
+}
+
+// Name normalization function should be called only once on flag addition
+func TestMultipleNormalizeFlagNameInvocations(t *testing.T) {
+	normalizeFlagNameInvocations = 0
+
+	f := NewFlagSet("normalized", ContinueOnError)
+	f.SetNormalizeFunc(wordSepNormalizeFunc)
+	f.Bool("with_under_flag", false, "bool value")
+
+	if normalizeFlagNameInvocations != 1 {
+		t.Fatal("Expected normalizeFlagNameInvocations to be 1; got ", normalizeFlagNameInvocations)
+	}
+}
+
+//
+func TestHiddenFlagInUsage(t *testing.T) {
+	f := NewFlagSet("bob", ContinueOnError)
+	f.Bool("secretFlag", true, "shhh")
+	f.MarkHidden("secretFlag")
+
+	out := new(bytes.Buffer)
+	f.SetOutput(out)
+	f.PrintDefaults()
+
+	if strings.Contains(out.String(), "secretFlag") {
+		t.Errorf("found hidden flag in usage!")
+	}
+}
+
+//
+func TestHiddenFlagUsage(t *testing.T) {
+	f := NewFlagSet("bob", ContinueOnError)
+	f.Bool("secretFlag", true, "shhh")
+	f.MarkHidden("secretFlag")
+
+	args := []string{"--secretFlag"}
+	out, err := parseReturnStderr(t, f, args)
+	if err != nil {
+		t.Fatal("expected no error; got ", err)
+	}
+
+	if strings.Contains(out, "shhh") {
+		t.Errorf("usage message printed when using a hidden flag!")
+	}
+}
+
+const defaultOutput = `      --A                         for bootstrapping, allow 'any' type
+      --Alongflagname             disable bounds checking
+  -C, --CCC                       a boolean defaulting to true (default true)
+      --D path                    set relative path for local imports
+  -E, --EEE num[=1234]            a num with NoOptDefVal (default 4321)
+      --F number                  a non-zero number (default 2.7)
+      --G float                   a float that defaults to zero
+      --IP ip                     IP address with no default
+      --IPMask ipMask             Netmask address with no default
+      --IPNet ipNet               IP network with no default
+      --Ints ints                 int slice with zero default
+      --N int                     a non-zero int (default 27)
+      --ND1 string[="bar"]        a string with NoOptDefVal (default "foo")
+      --ND2 num[=4321]            a num with NoOptDefVal (default 1234)
+      --StringArray stringArray   string array with zero default
+      --StringSlice strings       string slice with zero default
+      --Z int                     an int that defaults to zero
+      --custom custom             custom Value implementation
+      --customP custom            a VarP with default (default 10)
+      --maxT timeout              set timeout for dial
+  -v, --verbose count             verbosity
+`
+
+// Custom value that satisfies the Value interface.
+type customValue int
+
+func (cv *customValue) String() string { return fmt.Sprintf("%v", *cv) }
+
+func (cv *customValue) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 64)
+	*cv = customValue(v)
+	return err
+}
+
+func (cv *customValue) Type() string { return "custom" }
+
+func TestPrintDefaults(t *testing.T) {
+	fs := NewFlagSet("print defaults test", ContinueOnError)
+	var buf bytes.Buffer
+	fs.SetOutput(&buf)
+	fs.Bool("A", false, "for bootstrapping, allow 'any' type")
+	fs.Bool("Alongflagname", false, "disable bounds checking")
+	fs.BoolP("CCC", "C", true, "a boolean defaulting to true")
+	fs.String("D", "", "set relative `path` for local imports")
+	fs.Float64("F", 2.7, "a non-zero `number`")
+	fs.Float64("G", 0, "a float that defaults to zero")
+	fs.Int("N", 27, "a non-zero int")
+	fs.IntSlice("Ints", []int{}, "int slice with zero default")
+	fs.IP("IP", nil, "IP address with no default")
+	fs.IPMask("IPMask", nil, "Netmask address with no default")
+	fs.IPNet("IPNet", net.IPNet{}, "IP network with no default")
+	fs.Int("Z", 0, "an int that defaults to zero")
+	fs.Duration("maxT", 0, "set `timeout` for dial")
+	fs.String("ND1", "foo", "a string with NoOptDefVal")
+	fs.Lookup("ND1").NoOptDefVal = "bar"
+	fs.Int("ND2", 1234, "a `num` with NoOptDefVal")
+	fs.Lookup("ND2").NoOptDefVal = "4321"
+	fs.IntP("EEE", "E", 4321, "a `num` with NoOptDefVal")
+	fs.ShorthandLookup("E").NoOptDefVal = "1234"
+	fs.StringSlice("StringSlice", []string{}, "string slice with zero default")
+	fs.StringArray("StringArray", []string{}, "string array with zero default")
+	fs.CountP("verbose", "v", "verbosity")
+
+	var cv customValue
+	fs.Var(&cv, "custom", "custom Value implementation")
+
+	cv2 := customValue(10)
+	fs.VarP(&cv2, "customP", "", "a VarP with default")
+
+	fs.PrintDefaults()
+	got := buf.String()
+	if got != defaultOutput {
+		fmt.Println("\n" + got)
+		fmt.Println("\n" + defaultOutput)
+		t.Errorf("got %q want %q\n", got, defaultOutput)
+	}
+}
+
+func TestVisitAllFlagOrder(t *testing.T) {
+	fs := NewFlagSet("TestVisitAllFlagOrder", ContinueOnError)
+	fs.SortFlags = false
+	// https://github.com/spf13/pflag/issues/120
+	fs.SetNormalizeFunc(func(f *FlagSet, name string) NormalizedName {
+		return NormalizedName(name)
+	})
+
+	names := []string{"C", "B", "A", "D"}
+	for _, name := range names {
+		fs.Bool(name, false, "")
+	}
+
+	i := 0
+	fs.VisitAll(func(f *Flag) {
+		if names[i] != f.Name {
+			t.Errorf("Incorrect order. Expected %v, got %v", names[i], f.Name)
+		}
+		i++
+	})
+}
+
+func TestVisitFlagOrder(t *testing.T) {
+	fs := NewFlagSet("TestVisitFlagOrder", ContinueOnError)
+	fs.SortFlags = false
+	names := []string{"C", "B", "A", "D"}
+	for _, name := range names {
+		fs.Bool(name, false, "")
+		fs.Set(name, "true")
+	}
+
+	i := 0
+	fs.Visit(func(f *Flag) {
+		if names[i] != f.Name {
+			t.Errorf("Incorrect order. Expected %v, got %v", names[i], f.Name)
+		}
+		i++
+	})
+}

vendor/github.com/spf13/pflag/float32.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- float32 Value
+type float32Value float32
+
+func newFloat32Value(val float32, p *float32) *float32Value {
+	*p = val
+	return (*float32Value)(p)
+}
+
+func (f *float32Value) Set(s string) error {
+	v, err := strconv.ParseFloat(s, 32)
+	*f = float32Value(v)
+	return err
+}
+
+func (f *float32Value) Type() string {
+	return "float32"
+}
+
+func (f *float32Value) String() string { return strconv.FormatFloat(float64(*f), 'g', -1, 32) }
+
+func float32Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseFloat(sval, 32)
+	if err != nil {
+		return 0, err
+	}
+	return float32(v), nil
+}
+
+// GetFloat32 return the float32 value of a flag with the given name
+func (f *FlagSet) GetFloat32(name string) (float32, error) {
+	val, err := f.getFlagType(name, "float32", float32Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(float32), nil
+}
+
+// Float32Var defines a float32 flag with specified name, default value, and usage string.
+// The argument p points to a float32 variable in which to store the value of the flag.
+func (f *FlagSet) Float32Var(p *float32, name string, value float32, usage string) {
+	f.VarP(newFloat32Value(value, p), name, "", usage)
+}
+
+// Float32VarP is like Float32Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float32VarP(p *float32, name, shorthand string, value float32, usage string) {
+	f.VarP(newFloat32Value(value, p), name, shorthand, usage)
+}
+
+// Float32Var defines a float32 flag with specified name, default value, and usage string.
+// The argument p points to a float32 variable in which to store the value of the flag.
+func Float32Var(p *float32, name string, value float32, usage string) {
+	CommandLine.VarP(newFloat32Value(value, p), name, "", usage)
+}
+
+// Float32VarP is like Float32Var, but accepts a shorthand letter that can be used after a single dash.
+func Float32VarP(p *float32, name, shorthand string, value float32, usage string) {
+	CommandLine.VarP(newFloat32Value(value, p), name, shorthand, usage)
+}
+
+// Float32 defines a float32 flag with specified name, default value, and usage string.
+// The return value is the address of a float32 variable that stores the value of the flag.
+func (f *FlagSet) Float32(name string, value float32, usage string) *float32 {
+	p := new(float32)
+	f.Float32VarP(p, name, "", value, usage)
+	return p
+}
+
+// Float32P is like Float32, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float32P(name, shorthand string, value float32, usage string) *float32 {
+	p := new(float32)
+	f.Float32VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Float32 defines a float32 flag with specified name, default value, and usage string.
+// The return value is the address of a float32 variable that stores the value of the flag.
+func Float32(name string, value float32, usage string) *float32 {
+	return CommandLine.Float32P(name, "", value, usage)
+}
+
+// Float32P is like Float32, but accepts a shorthand letter that can be used after a single dash.
+func Float32P(name, shorthand string, value float32, usage string) *float32 {
+	return CommandLine.Float32P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/float64.go

@@ -0,0 +1,84 @@
+package pflag
+
+import "strconv"
+
+// -- float64 Value
+type float64Value float64
+
+func newFloat64Value(val float64, p *float64) *float64Value {
+	*p = val
+	return (*float64Value)(p)
+}
+
+func (f *float64Value) Set(s string) error {
+	v, err := strconv.ParseFloat(s, 64)
+	*f = float64Value(v)
+	return err
+}
+
+func (f *float64Value) Type() string {
+	return "float64"
+}
+
+func (f *float64Value) String() string { return strconv.FormatFloat(float64(*f), 'g', -1, 64) }
+
+func float64Conv(sval string) (interface{}, error) {
+	return strconv.ParseFloat(sval, 64)
+}
+
+// GetFloat64 return the float64 value of a flag with the given name
+func (f *FlagSet) GetFloat64(name string) (float64, error) {
+	val, err := f.getFlagType(name, "float64", float64Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(float64), nil
+}
+
+// Float64Var defines a float64 flag with specified name, default value, and usage string.
+// The argument p points to a float64 variable in which to store the value of the flag.
+func (f *FlagSet) Float64Var(p *float64, name string, value float64, usage string) {
+	f.VarP(newFloat64Value(value, p), name, "", usage)
+}
+
+// Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
+	f.VarP(newFloat64Value(value, p), name, shorthand, usage)
+}
+
+// Float64Var defines a float64 flag with specified name, default value, and usage string.
+// The argument p points to a float64 variable in which to store the value of the flag.
+func Float64Var(p *float64, name string, value float64, usage string) {
+	CommandLine.VarP(newFloat64Value(value, p), name, "", usage)
+}
+
+// Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
+func Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
+	CommandLine.VarP(newFloat64Value(value, p), name, shorthand, usage)
+}
+
+// Float64 defines a float64 flag with specified name, default value, and usage string.
+// The return value is the address of a float64 variable that stores the value of the flag.
+func (f *FlagSet) Float64(name string, value float64, usage string) *float64 {
+	p := new(float64)
+	f.Float64VarP(p, name, "", value, usage)
+	return p
+}
+
+// Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float64P(name, shorthand string, value float64, usage string) *float64 {
+	p := new(float64)
+	f.Float64VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Float64 defines a float64 flag with specified name, default value, and usage string.
+// The return value is the address of a float64 variable that stores the value of the flag.
+func Float64(name string, value float64, usage string) *float64 {
+	return CommandLine.Float64P(name, "", value, usage)
+}
+
+// Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
+func Float64P(name, shorthand string, value float64, usage string) *float64 {
+	return CommandLine.Float64P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/golangflag.go

@@ -0,0 +1,105 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag
+
+import (
+	goflag "flag"
+	"reflect"
+	"strings"
+)
+
+// flagValueWrapper implements pflag.Value around a flag.Value.  The main
+// difference here is the addition of the Type method that returns a string
+// name of the type.  As this is generally unknown, we approximate that with
+// reflection.
+type flagValueWrapper struct {
+	inner    goflag.Value
+	flagType string
+}
+
+// We are just copying the boolFlag interface out of goflag as that is what
+// they use to decide if a flag should get "true" when no arg is given.
+type goBoolFlag interface {
+	goflag.Value
+	IsBoolFlag() bool
+}
+
+func wrapFlagValue(v goflag.Value) Value {
+	// If the flag.Value happens to also be a pflag.Value, just use it directly.
+	if pv, ok := v.(Value); ok {
+		return pv
+	}
+
+	pv := &flagValueWrapper{
+		inner: v,
+	}
+
+	t := reflect.TypeOf(v)
+	if t.Kind() == reflect.Interface || t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+
+	pv.flagType = strings.TrimSuffix(t.Name(), "Value")
+	return pv
+}
+
+func (v *flagValueWrapper) String() string {
+	return v.inner.String()
+}
+
+func (v *flagValueWrapper) Set(s string) error {
+	return v.inner.Set(s)
+}
+
+func (v *flagValueWrapper) Type() string {
+	return v.flagType
+}
+
+// PFlagFromGoFlag will return a *pflag.Flag given a *flag.Flag
+// If the *flag.Flag.Name was a single character (ex: `v`) it will be accessiblei
+// with both `-v` and `--v` in flags. If the golang flag was more than a single
+// character (ex: `verbose`) it will only be accessible via `--verbose`
+func PFlagFromGoFlag(goflag *goflag.Flag) *Flag {
+	// Remember the default value as a string; it won't change.
+	flag := &Flag{
+		Name:  goflag.Name,
+		Usage: goflag.Usage,
+		Value: wrapFlagValue(goflag.Value),
+		// Looks like golang flags don't set DefValue correctly  :-(
+		//DefValue: goflag.DefValue,
+		DefValue: goflag.Value.String(),
+	}
+	// Ex: if the golang flag was -v, allow both -v and --v to work
+	if len(flag.Name) == 1 {
+		flag.Shorthand = flag.Name
+	}
+	if fv, ok := goflag.Value.(goBoolFlag); ok && fv.IsBoolFlag() {
+		flag.NoOptDefVal = "true"
+	}
+	return flag
+}
+
+// AddGoFlag will add the given *flag.Flag to the pflag.FlagSet
+func (f *FlagSet) AddGoFlag(goflag *goflag.Flag) {
+	if f.Lookup(goflag.Name) != nil {
+		return
+	}
+	newflag := PFlagFromGoFlag(goflag)
+	f.AddFlag(newflag)
+}
+
+// AddGoFlagSet will add the given *flag.FlagSet to the pflag.FlagSet
+func (f *FlagSet) AddGoFlagSet(newSet *goflag.FlagSet) {
+	if newSet == nil {
+		return
+	}
+	newSet.VisitAll(func(goflag *goflag.Flag) {
+		f.AddGoFlag(goflag)
+	})
+	if f.addedGoFlagSets == nil {
+		f.addedGoFlagSets = make([]*goflag.FlagSet, 0)
+	}
+	f.addedGoFlagSets = append(f.addedGoFlagSets, newSet)
+}

vendor/github.com/spf13/pflag/golangflag_test.go

@@ -0,0 +1,47 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag
+
+import (
+	goflag "flag"
+	"testing"
+)
+
+func TestGoflags(t *testing.T) {
+	goflag.String("stringFlag", "stringFlag", "stringFlag")
+	goflag.Bool("boolFlag", false, "boolFlag")
+
+	f := NewFlagSet("test", ContinueOnError)
+
+	f.AddGoFlagSet(goflag.CommandLine)
+	err := f.Parse([]string{"--stringFlag=bob", "--boolFlag"})
+	if err != nil {
+		t.Fatal("expected no error; get", err)
+	}
+
+	getString, err := f.GetString("stringFlag")
+	if err != nil {
+		t.Fatal("expected no error; get", err)
+	}
+	if getString != "bob" {
+		t.Fatalf("expected getString=bob but got getString=%s", getString)
+	}
+
+	getBool, err := f.GetBool("boolFlag")
+	if err != nil {
+		t.Fatal("expected no error; get", err)
+	}
+	if getBool != true {
+		t.Fatalf("expected getBool=true but got getBool=%v", getBool)
+	}
+	if !f.Parsed() {
+		t.Fatal("f.Parsed() return false after f.Parse() called")
+	}
+
+	// in fact it is useless. because `go test` called flag.Parse()
+	if !goflag.CommandLine.Parsed() {
+		t.Fatal("goflag.CommandLine.Parsed() return false after f.Parse() called")
+	}
+}

vendor/github.com/spf13/pflag/int.go

@@ -0,0 +1,84 @@
+package pflag
+
+import "strconv"
+
+// -- int Value
+type intValue int
+
+func newIntValue(val int, p *int) *intValue {
+	*p = val
+	return (*intValue)(p)
+}
+
+func (i *intValue) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 64)
+	*i = intValue(v)
+	return err
+}
+
+func (i *intValue) Type() string {
+	return "int"
+}
+
+func (i *intValue) String() string { return strconv.Itoa(int(*i)) }
+
+func intConv(sval string) (interface{}, error) {
+	return strconv.Atoi(sval)
+}
+
+// GetInt return the int value of a flag with the given name
+func (f *FlagSet) GetInt(name string) (int, error) {
+	val, err := f.getFlagType(name, "int", intConv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int), nil
+}
+
+// IntVar defines an int flag with specified name, default value, and usage string.
+// The argument p points to an int variable in which to store the value of the flag.
+func (f *FlagSet) IntVar(p *int, name string, value int, usage string) {
+	f.VarP(newIntValue(value, p), name, "", usage)
+}
+
+// IntVarP is like IntVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntVarP(p *int, name, shorthand string, value int, usage string) {
+	f.VarP(newIntValue(value, p), name, shorthand, usage)
+}
+
+// IntVar defines an int flag with specified name, default value, and usage string.
+// The argument p points to an int variable in which to store the value of the flag.
+func IntVar(p *int, name string, value int, usage string) {
+	CommandLine.VarP(newIntValue(value, p), name, "", usage)
+}
+
+// IntVarP is like IntVar, but accepts a shorthand letter that can be used after a single dash.
+func IntVarP(p *int, name, shorthand string, value int, usage string) {
+	CommandLine.VarP(newIntValue(value, p), name, shorthand, usage)
+}
+
+// Int defines an int flag with specified name, default value, and usage string.
+// The return value is the address of an int variable that stores the value of the flag.
+func (f *FlagSet) Int(name string, value int, usage string) *int {
+	p := new(int)
+	f.IntVarP(p, name, "", value, usage)
+	return p
+}
+
+// IntP is like Int, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntP(name, shorthand string, value int, usage string) *int {
+	p := new(int)
+	f.IntVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int defines an int flag with specified name, default value, and usage string.
+// The return value is the address of an int variable that stores the value of the flag.
+func Int(name string, value int, usage string) *int {
+	return CommandLine.IntP(name, "", value, usage)
+}
+
+// IntP is like Int, but accepts a shorthand letter that can be used after a single dash.
+func IntP(name, shorthand string, value int, usage string) *int {
+	return CommandLine.IntP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/int16.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- int16 Value
+type int16Value int16
+
+func newInt16Value(val int16, p *int16) *int16Value {
+	*p = val
+	return (*int16Value)(p)
+}
+
+func (i *int16Value) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 16)
+	*i = int16Value(v)
+	return err
+}
+
+func (i *int16Value) Type() string {
+	return "int16"
+}
+
+func (i *int16Value) String() string { return strconv.FormatInt(int64(*i), 10) }
+
+func int16Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseInt(sval, 0, 16)
+	if err != nil {
+		return 0, err
+	}
+	return int16(v), nil
+}
+
+// GetInt16 returns the int16 value of a flag with the given name
+func (f *FlagSet) GetInt16(name string) (int16, error) {
+	val, err := f.getFlagType(name, "int16", int16Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int16), nil
+}
+
+// Int16Var defines an int16 flag with specified name, default value, and usage string.
+// The argument p points to an int16 variable in which to store the value of the flag.
+func (f *FlagSet) Int16Var(p *int16, name string, value int16, usage string) {
+	f.VarP(newInt16Value(value, p), name, "", usage)
+}
+
+// Int16VarP is like Int16Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int16VarP(p *int16, name, shorthand string, value int16, usage string) {
+	f.VarP(newInt16Value(value, p), name, shorthand, usage)
+}
+
+// Int16Var defines an int16 flag with specified name, default value, and usage string.
+// The argument p points to an int16 variable in which to store the value of the flag.
+func Int16Var(p *int16, name string, value int16, usage string) {
+	CommandLine.VarP(newInt16Value(value, p), name, "", usage)
+}
+
+// Int16VarP is like Int16Var, but accepts a shorthand letter that can be used after a single dash.
+func Int16VarP(p *int16, name, shorthand string, value int16, usage string) {
+	CommandLine.VarP(newInt16Value(value, p), name, shorthand, usage)
+}
+
+// Int16 defines an int16 flag with specified name, default value, and usage string.
+// The return value is the address of an int16 variable that stores the value of the flag.
+func (f *FlagSet) Int16(name string, value int16, usage string) *int16 {
+	p := new(int16)
+	f.Int16VarP(p, name, "", value, usage)
+	return p
+}
+
+// Int16P is like Int16, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int16P(name, shorthand string, value int16, usage string) *int16 {
+	p := new(int16)
+	f.Int16VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int16 defines an int16 flag with specified name, default value, and usage string.
+// The return value is the address of an int16 variable that stores the value of the flag.
+func Int16(name string, value int16, usage string) *int16 {
+	return CommandLine.Int16P(name, "", value, usage)
+}
+
+// Int16P is like Int16, but accepts a shorthand letter that can be used after a single dash.
+func Int16P(name, shorthand string, value int16, usage string) *int16 {
+	return CommandLine.Int16P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/int32.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- int32 Value
+type int32Value int32
+
+func newInt32Value(val int32, p *int32) *int32Value {
+	*p = val
+	return (*int32Value)(p)
+}
+
+func (i *int32Value) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 32)
+	*i = int32Value(v)
+	return err
+}
+
+func (i *int32Value) Type() string {
+	return "int32"
+}
+
+func (i *int32Value) String() string { return strconv.FormatInt(int64(*i), 10) }
+
+func int32Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseInt(sval, 0, 32)
+	if err != nil {
+		return 0, err
+	}
+	return int32(v), nil
+}
+
+// GetInt32 return the int32 value of a flag with the given name
+func (f *FlagSet) GetInt32(name string) (int32, error) {
+	val, err := f.getFlagType(name, "int32", int32Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int32), nil
+}
+
+// Int32Var defines an int32 flag with specified name, default value, and usage string.
+// The argument p points to an int32 variable in which to store the value of the flag.
+func (f *FlagSet) Int32Var(p *int32, name string, value int32, usage string) {
+	f.VarP(newInt32Value(value, p), name, "", usage)
+}
+
+// Int32VarP is like Int32Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int32VarP(p *int32, name, shorthand string, value int32, usage string) {
+	f.VarP(newInt32Value(value, p), name, shorthand, usage)
+}
+
+// Int32Var defines an int32 flag with specified name, default value, and usage string.
+// The argument p points to an int32 variable in which to store the value of the flag.
+func Int32Var(p *int32, name string, value int32, usage string) {
+	CommandLine.VarP(newInt32Value(value, p), name, "", usage)
+}
+
+// Int32VarP is like Int32Var, but accepts a shorthand letter that can be used after a single dash.
+func Int32VarP(p *int32, name, shorthand string, value int32, usage string) {
+	CommandLine.VarP(newInt32Value(value, p), name, shorthand, usage)
+}
+
+// Int32 defines an int32 flag with specified name, default value, and usage string.
+// The return value is the address of an int32 variable that stores the value of the flag.
+func (f *FlagSet) Int32(name string, value int32, usage string) *int32 {
+	p := new(int32)
+	f.Int32VarP(p, name, "", value, usage)
+	return p
+}
+
+// Int32P is like Int32, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int32P(name, shorthand string, value int32, usage string) *int32 {
+	p := new(int32)
+	f.Int32VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int32 defines an int32 flag with specified name, default value, and usage string.
+// The return value is the address of an int32 variable that stores the value of the flag.
+func Int32(name string, value int32, usage string) *int32 {
+	return CommandLine.Int32P(name, "", value, usage)
+}
+
+// Int32P is like Int32, but accepts a shorthand letter that can be used after a single dash.
+func Int32P(name, shorthand string, value int32, usage string) *int32 {
+	return CommandLine.Int32P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/int64.go

@@ -0,0 +1,84 @@
+package pflag
+
+import "strconv"
+
+// -- int64 Value
+type int64Value int64
+
+func newInt64Value(val int64, p *int64) *int64Value {
+	*p = val
+	return (*int64Value)(p)
+}
+
+func (i *int64Value) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 64)
+	*i = int64Value(v)
+	return err
+}
+
+func (i *int64Value) Type() string {
+	return "int64"
+}
+
+func (i *int64Value) String() string { return strconv.FormatInt(int64(*i), 10) }
+
+func int64Conv(sval string) (interface{}, error) {
+	return strconv.ParseInt(sval, 0, 64)
+}
+
+// GetInt64 return the int64 value of a flag with the given name
+func (f *FlagSet) GetInt64(name string) (int64, error) {
+	val, err := f.getFlagType(name, "int64", int64Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int64), nil
+}
+
+// Int64Var defines an int64 flag with specified name, default value, and usage string.
+// The argument p points to an int64 variable in which to store the value of the flag.
+func (f *FlagSet) Int64Var(p *int64, name string, value int64, usage string) {
+	f.VarP(newInt64Value(value, p), name, "", usage)
+}
+
+// Int64VarP is like Int64Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int64VarP(p *int64, name, shorthand string, value int64, usage string) {
+	f.VarP(newInt64Value(value, p), name, shorthand, usage)
+}
+
+// Int64Var defines an int64 flag with specified name, default value, and usage string.
+// The argument p points to an int64 variable in which to store the value of the flag.
+func Int64Var(p *int64, name string, value int64, usage string) {
+	CommandLine.VarP(newInt64Value(value, p), name, "", usage)
+}
+
+// Int64VarP is like Int64Var, but accepts a shorthand letter that can be used after a single dash.
+func Int64VarP(p *int64, name, shorthand string, value int64, usage string) {
+	CommandLine.VarP(newInt64Value(value, p), name, shorthand, usage)
+}
+
+// Int64 defines an int64 flag with specified name, default value, and usage string.
+// The return value is the address of an int64 variable that stores the value of the flag.
+func (f *FlagSet) Int64(name string, value int64, usage string) *int64 {
+	p := new(int64)
+	f.Int64VarP(p, name, "", value, usage)
+	return p
+}
+
+// Int64P is like Int64, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int64P(name, shorthand string, value int64, usage string) *int64 {
+	p := new(int64)
+	f.Int64VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int64 defines an int64 flag with specified name, default value, and usage string.
+// The return value is the address of an int64 variable that stores the value of the flag.
+func Int64(name string, value int64, usage string) *int64 {
+	return CommandLine.Int64P(name, "", value, usage)
+}
+
+// Int64P is like Int64, but accepts a shorthand letter that can be used after a single dash.
+func Int64P(name, shorthand string, value int64, usage string) *int64 {
+	return CommandLine.Int64P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/int8.go

@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- int8 Value
+type int8Value int8
+
+func newInt8Value(val int8, p *int8) *int8Value {
+	*p = val
+	return (*int8Value)(p)
+}
+
+func (i *int8Value) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 8)
+	*i = int8Value(v)
+	return err
+}
+
+func (i *int8Value) Type() string {
+	return "int8"
+}
+
+func (i *int8Value) String() string { return strconv.FormatInt(int64(*i), 10) }
+
+func int8Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseInt(sval, 0, 8)
+	if err != nil {
+		return 0, err
+	}
+	return int8(v), nil
+}
+
+// GetInt8 return the int8 value of a flag with the given name
+func (f *FlagSet) GetInt8(name string) (int8, error) {
+	val, err := f.getFlagType(name, "int8", int8Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int8), nil
+}
+
+// Int8Var defines an int8 flag with specified name, default value, and usage string.
+// The argument p points to an int8 variable in which to store the value of the flag.
+func (f *FlagSet) Int8Var(p *int8, name string, value int8, usage string) {
+	f.VarP(newInt8Value(value, p), name, "", usage)
+}
+
+// Int8VarP is like Int8Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int8VarP(p *int8, name, shorthand string, value int8, usage string) {
+	f.VarP(newInt8Value(value, p), name, shorthand, usage)
+}
+
+// Int8Var defines an int8 flag with specified name, default value, and usage string.
+// The argument p points to an int8 variable in which to store the value of the flag.
+func Int8Var(p *int8, name string, value int8, usage string) {
+	CommandLine.VarP(newInt8Value(value, p), name, "", usage)
+}
+
+// Int8VarP is like Int8Var, but accepts a shorthand letter that can be used after a single dash.
+func Int8VarP(p *int8, name, shorthand string, value int8, usage string) {
+	CommandLine.VarP(newInt8Value(value, p), name, shorthand, usage)
+}
+
+// Int8 defines an int8 flag with specified name, default value, and usage string.
+// The return value is the address of an int8 variable that stores the value of the flag.
+func (f *FlagSet) Int8(name string, value int8, usage string) *int8 {
+	p := new(int8)
+	f.Int8VarP(p, name, "", value, usage)
+	return p
+}
+
+// Int8P is like Int8, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int8P(name, shorthand string, value int8, usage string) *int8 {
+	p := new(int8)
+	f.Int8VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int8 defines an int8 flag with specified name, default value, and usage string.
+// The return value is the address of an int8 variable that stores the value of the flag.
+func Int8(name string, value int8, usage string) *int8 {
+	return CommandLine.Int8P(name, "", value, usage)
+}
+
+// Int8P is like Int8, but accepts a shorthand letter that can be used after a single dash.
+func Int8P(name, shorthand string, value int8, usage string) *int8 {
+	return CommandLine.Int8P(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/int_slice.go

@@ -0,0 +1,128 @@
+package pflag
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// -- intSlice Value
+type intSliceValue struct {
+	value   *[]int
+	changed bool
+}
+
+func newIntSliceValue(val []int, p *[]int) *intSliceValue {
+	isv := new(intSliceValue)
+	isv.value = p
+	*isv.value = val
+	return isv
+}
+
+func (s *intSliceValue) Set(val string) error {
+	ss := strings.Split(val, ",")
+	out := make([]int, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = strconv.Atoi(d)
+		if err != nil {
+			return err
+		}
+
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *intSliceValue) Type() string {
+	return "intSlice"
+}
+
+func (s *intSliceValue) String() string {
+	out := make([]string, len(*s.value))
+	for i, d := range *s.value {
+		out[i] = fmt.Sprintf("%d", d)
+	}
+	return "[" + strings.Join(out, ",") + "]"
+}
+
+func intSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Empty string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []int{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]int, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = strconv.Atoi(d)
+		if err != nil {
+			return nil, err
+		}
+
+	}
+	return out, nil
+}
+
+// GetIntSlice return the []int value of a flag with the given name
+func (f *FlagSet) GetIntSlice(name string) ([]int, error) {
+	val, err := f.getFlagType(name, "intSlice", intSliceConv)
+	if err != nil {
+		return []int{}, err
+	}
+	return val.([]int), nil
+}
+
+// IntSliceVar defines a intSlice flag with specified name, default value, and usage string.
+// The argument p points to a []int variable in which to store the value of the flag.
+func (f *FlagSet) IntSliceVar(p *[]int, name string, value []int, usage string) {
+	f.VarP(newIntSliceValue(value, p), name, "", usage)
+}
+
+// IntSliceVarP is like IntSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntSliceVarP(p *[]int, name, shorthand string, value []int, usage string) {
+	f.VarP(newIntSliceValue(value, p), name, shorthand, usage)
+}
+
+// IntSliceVar defines a int[] flag with specified name, default value, and usage string.
+// The argument p points to a int[] variable in which to store the value of the flag.
+func IntSliceVar(p *[]int, name string, value []int, usage string) {
+	CommandLine.VarP(newIntSliceValue(value, p), name, "", usage)
+}
+
+// IntSliceVarP is like IntSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func IntSliceVarP(p *[]int, name, shorthand string, value []int, usage string) {
+	CommandLine.VarP(newIntSliceValue(value, p), name, shorthand, usage)
+}
+
+// IntSlice defines a []int flag with specified name, default value, and usage string.
+// The return value is the address of a []int variable that stores the value of the flag.
+func (f *FlagSet) IntSlice(name string, value []int, usage string) *[]int {
+	p := []int{}
+	f.IntSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// IntSliceP is like IntSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntSliceP(name, shorthand string, value []int, usage string) *[]int {
+	p := []int{}
+	f.IntSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// IntSlice defines a []int flag with specified name, default value, and usage string.
+// The return value is the address of a []int variable that stores the value of the flag.
+func IntSlice(name string, value []int, usage string) *[]int {
+	return CommandLine.IntSliceP(name, "", value, usage)
+}
+
+// IntSliceP is like IntSlice, but accepts a shorthand letter that can be used after a single dash.
+func IntSliceP(name, shorthand string, value []int, usage string) *[]int {
+	return CommandLine.IntSliceP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/int_slice_test.go

@@ -0,0 +1,165 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func setUpISFlagSet(isp *[]int) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.IntSliceVar(isp, "is", []int{}, "Command separated list!")
+	return f
+}
+
+func setUpISFlagSetWithDefault(isp *[]int) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.IntSliceVar(isp, "is", []int{0, 1}, "Command separated list!")
+	return f
+}
+
+func TestEmptyIS(t *testing.T) {
+	var is []int
+	f := setUpISFlagSet(&is)
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	getIS, err := f.GetIntSlice("is")
+	if err != nil {
+		t.Fatal("got an error from GetIntSlice():", err)
+	}
+	if len(getIS) != 0 {
+		t.Fatalf("got is %v with len=%d but expected length=0", getIS, len(getIS))
+	}
+}
+
+func TestIS(t *testing.T) {
+	var is []int
+	f := setUpISFlagSet(&is)
+
+	vals := []string{"1", "2", "4", "3"}
+	arg := fmt.Sprintf("--is=%s", strings.Join(vals, ","))
+	err := f.Parse([]string{arg})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range is {
+		d, err := strconv.Atoi(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if d != v {
+			t.Fatalf("expected is[%d] to be %s but got: %d", i, vals[i], v)
+		}
+	}
+	getIS, err := f.GetIntSlice("is")
+	if err != nil {
+		t.Fatalf("got error: %v", err)
+	}
+	for i, v := range getIS {
+		d, err := strconv.Atoi(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if d != v {
+			t.Fatalf("expected is[%d] to be %s but got: %d from GetIntSlice", i, vals[i], v)
+		}
+	}
+}
+
+func TestISDefault(t *testing.T) {
+	var is []int
+	f := setUpISFlagSetWithDefault(&is)
+
+	vals := []string{"0", "1"}
+
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range is {
+		d, err := strconv.Atoi(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if d != v {
+			t.Fatalf("expected is[%d] to be %d but got: %d", i, d, v)
+		}
+	}
+
+	getIS, err := f.GetIntSlice("is")
+	if err != nil {
+		t.Fatal("got an error from GetIntSlice():", err)
+	}
+	for i, v := range getIS {
+		d, err := strconv.Atoi(vals[i])
+		if err != nil {
+			t.Fatal("got an error from GetIntSlice():", err)
+		}
+		if d != v {
+			t.Fatalf("expected is[%d] to be %d from GetIntSlice but got: %d", i, d, v)
+		}
+	}
+}
+
+func TestISWithDefault(t *testing.T) {
+	var is []int
+	f := setUpISFlagSetWithDefault(&is)
+
+	vals := []string{"1", "2"}
+	arg := fmt.Sprintf("--is=%s", strings.Join(vals, ","))
+	err := f.Parse([]string{arg})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range is {
+		d, err := strconv.Atoi(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if d != v {
+			t.Fatalf("expected is[%d] to be %d but got: %d", i, d, v)
+		}
+	}
+
+	getIS, err := f.GetIntSlice("is")
+	if err != nil {
+		t.Fatal("got an error from GetIntSlice():", err)
+	}
+	for i, v := range getIS {
+		d, err := strconv.Atoi(vals[i])
+		if err != nil {
+			t.Fatalf("got error: %v", err)
+		}
+		if d != v {
+			t.Fatalf("expected is[%d] to be %d from GetIntSlice but got: %d", i, d, v)
+		}
+	}
+}
+
+func TestISCalledTwice(t *testing.T) {
+	var is []int
+	f := setUpISFlagSet(&is)
+
+	in := []string{"1,2", "3"}
+	expected := []int{1, 2, 3}
+	argfmt := "--is=%s"
+	arg1 := fmt.Sprintf(argfmt, in[0])
+	arg2 := fmt.Sprintf(argfmt, in[1])
+	err := f.Parse([]string{arg1, arg2})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range is {
+		if expected[i] != v {
+			t.Fatalf("expected is[%d] to be %d but got: %d", i, expected[i], v)
+		}
+	}
+}

vendor/github.com/spf13/pflag/ip.go

@@ -0,0 +1,94 @@
+package pflag
+
+import (
+	"fmt"
+	"net"
+	"strings"
+)
+
+// -- net.IP value
+type ipValue net.IP
+
+func newIPValue(val net.IP, p *net.IP) *ipValue {
+	*p = val
+	return (*ipValue)(p)
+}
+
+func (i *ipValue) String() string { return net.IP(*i).String() }
+func (i *ipValue) Set(s string) error {
+	ip := net.ParseIP(strings.TrimSpace(s))
+	if ip == nil {
+		return fmt.Errorf("failed to parse IP: %q", s)
+	}
+	*i = ipValue(ip)
+	return nil
+}
+
+func (i *ipValue) Type() string {
+	return "ip"
+}
+
+func ipConv(sval string) (interface{}, error) {
+	ip := net.ParseIP(sval)
+	if ip != nil {
+		return ip, nil
+	}
+	return nil, fmt.Errorf("invalid string being converted to IP address: %s", sval)
+}
+
+// GetIP return the net.IP value of a flag with the given name
+func (f *FlagSet) GetIP(name string) (net.IP, error) {
+	val, err := f.getFlagType(name, "ip", ipConv)
+	if err != nil {
+		return nil, err
+	}
+	return val.(net.IP), nil
+}
+
+// IPVar defines an net.IP flag with specified name, default value, and usage string.
+// The argument p points to an net.IP variable in which to store the value of the flag.
+func (f *FlagSet) IPVar(p *net.IP, name string, value net.IP, usage string) {
+	f.VarP(newIPValue(value, p), name, "", usage)
+}
+
+// IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) {
+	f.VarP(newIPValue(value, p), name, shorthand, usage)
+}
+
+// IPVar defines an net.IP flag with specified name, default value, and usage string.
+// The argument p points to an net.IP variable in which to store the value of the flag.
+func IPVar(p *net.IP, name string, value net.IP, usage string) {
+	CommandLine.VarP(newIPValue(value, p), name, "", usage)
+}
+
+// IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash.
+func IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) {
+	CommandLine.VarP(newIPValue(value, p), name, shorthand, usage)
+}
+
+// IP defines an net.IP flag with specified name, default value, and usage string.
+// The return value is the address of an net.IP variable that stores the value of the flag.
+func (f *FlagSet) IP(name string, value net.IP, usage string) *net.IP {
+	p := new(net.IP)
+	f.IPVarP(p, name, "", value, usage)
+	return p
+}
+
+// IPP is like IP, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPP(name, shorthand string, value net.IP, usage string) *net.IP {
+	p := new(net.IP)
+	f.IPVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// IP defines an net.IP flag with specified name, default value, and usage string.
+// The return value is the address of an net.IP variable that stores the value of the flag.
+func IP(name string, value net.IP, usage string) *net.IP {
+	return CommandLine.IPP(name, "", value, usage)
+}
+
+// IPP is like IP, but accepts a shorthand letter that can be used after a single dash.
+func IPP(name, shorthand string, value net.IP, usage string) *net.IP {
+	return CommandLine.IPP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/ip_slice.go

@@ -0,0 +1,148 @@
+package pflag
+
+import (
+	"fmt"
+	"io"
+	"net"
+	"strings"
+)
+
+// -- ipSlice Value
+type ipSliceValue struct {
+	value   *[]net.IP
+	changed bool
+}
+
+func newIPSliceValue(val []net.IP, p *[]net.IP) *ipSliceValue {
+	ipsv := new(ipSliceValue)
+	ipsv.value = p
+	*ipsv.value = val
+	return ipsv
+}
+
+// Set converts, and assigns, the comma-separated IP argument string representation as the []net.IP value of this flag.
+// If Set is called on a flag that already has a []net.IP assigned, the newly converted values will be appended.
+func (s *ipSliceValue) Set(val string) error {
+
+	// remove all quote characters
+	rmQuote := strings.NewReplacer(`"`, "", `'`, "", "`", "")
+
+	// read flag arguments with CSV parser
+	ipStrSlice, err := readAsCSV(rmQuote.Replace(val))
+	if err != nil && err != io.EOF {
+		return err
+	}
+
+	// parse ip values into slice
+	out := make([]net.IP, 0, len(ipStrSlice))
+	for _, ipStr := range ipStrSlice {
+		ip := net.ParseIP(strings.TrimSpace(ipStr))
+		if ip == nil {
+			return fmt.Errorf("invalid string being converted to IP address: %s", ipStr)
+		}
+		out = append(out, ip)
+	}
+
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+
+	s.changed = true
+
+	return nil
+}
+
+// Type returns a string that uniquely represents this flag's type.
+func (s *ipSliceValue) Type() string {
+	return "ipSlice"
+}
+
+// String defines a "native" format for this net.IP slice flag value.
+func (s *ipSliceValue) String() string {
+
+	ipStrSlice := make([]string, len(*s.value))
+	for i, ip := range *s.value {
+		ipStrSlice[i] = ip.String()
+	}
+
+	out, _ := writeAsCSV(ipStrSlice)
+
+	return "[" + out + "]"
+}
+
+func ipSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Emtpy string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []net.IP{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]net.IP, len(ss))
+	for i, sval := range ss {
+		ip := net.ParseIP(strings.TrimSpace(sval))
+		if ip == nil {
+			return nil, fmt.Errorf("invalid string being converted to IP address: %s", sval)
+		}
+		out[i] = ip
+	}
+	return out, nil
+}
+
+// GetIPSlice returns the []net.IP value of a flag with the given name
+func (f *FlagSet) GetIPSlice(name string) ([]net.IP, error) {
+	val, err := f.getFlagType(name, "ipSlice", ipSliceConv)
+	if err != nil {
+		return []net.IP{}, err
+	}
+	return val.([]net.IP), nil
+}
+
+// IPSliceVar defines a ipSlice flag with specified name, default value, and usage string.
+// The argument p points to a []net.IP variable in which to store the value of the flag.
+func (f *FlagSet) IPSliceVar(p *[]net.IP, name string, value []net.IP, usage string) {
+	f.VarP(newIPSliceValue(value, p), name, "", usage)
+}
+
+// IPSliceVarP is like IPSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPSliceVarP(p *[]net.IP, name, shorthand string, value []net.IP, usage string) {
+	f.VarP(newIPSliceValue(value, p), name, shorthand, usage)
+}
+
+// IPSliceVar defines a []net.IP flag with specified name, default value, and usage string.
+// The argument p points to a []net.IP variable in which to store the value of the flag.
+func IPSliceVar(p *[]net.IP, name string, value []net.IP, usage string) {
+	CommandLine.VarP(newIPSliceValue(value, p), name, "", usage)
+}
+
+// IPSliceVarP is like IPSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func IPSliceVarP(p *[]net.IP, name, shorthand string, value []net.IP, usage string) {
+	CommandLine.VarP(newIPSliceValue(value, p), name, shorthand, usage)
+}
+
+// IPSlice defines a []net.IP flag with specified name, default value, and usage string.
+// The return value is the address of a []net.IP variable that stores the value of that flag.
+func (f *FlagSet) IPSlice(name string, value []net.IP, usage string) *[]net.IP {
+	p := []net.IP{}
+	f.IPSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// IPSliceP is like IPSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPSliceP(name, shorthand string, value []net.IP, usage string) *[]net.IP {
+	p := []net.IP{}
+	f.IPSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// IPSlice defines a []net.IP flag with specified name, default value, and usage string.
+// The return value is the address of a []net.IP variable that stores the value of the flag.
+func IPSlice(name string, value []net.IP, usage string) *[]net.IP {
+	return CommandLine.IPSliceP(name, "", value, usage)
+}
+
+// IPSliceP is like IPSlice, but accepts a shorthand letter that can be used after a single dash.
+func IPSliceP(name, shorthand string, value []net.IP, usage string) *[]net.IP {
+	return CommandLine.IPSliceP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/ip_slice_test.go

@@ -0,0 +1,222 @@
+package pflag
+
+import (
+	"fmt"
+	"net"
+	"strings"
+	"testing"
+)
+
+func setUpIPSFlagSet(ipsp *[]net.IP) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.IPSliceVar(ipsp, "ips", []net.IP{}, "Command separated list!")
+	return f
+}
+
+func setUpIPSFlagSetWithDefault(ipsp *[]net.IP) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.IPSliceVar(ipsp, "ips",
+		[]net.IP{
+			net.ParseIP("192.168.1.1"),
+			net.ParseIP("0:0:0:0:0:0:0:1"),
+		},
+		"Command separated list!")
+	return f
+}
+
+func TestEmptyIP(t *testing.T) {
+	var ips []net.IP
+	f := setUpIPSFlagSet(&ips)
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	getIPS, err := f.GetIPSlice("ips")
+	if err != nil {
+		t.Fatal("got an error from GetIPSlice():", err)
+	}
+	if len(getIPS) != 0 {
+		t.Fatalf("got ips %v with len=%d but expected length=0", getIPS, len(getIPS))
+	}
+}
+
+func TestIPS(t *testing.T) {
+	var ips []net.IP
+	f := setUpIPSFlagSet(&ips)
+
+	vals := []string{"192.168.1.1", "10.0.0.1", "0:0:0:0:0:0:0:2"}
+	arg := fmt.Sprintf("--ips=%s", strings.Join(vals, ","))
+	err := f.Parse([]string{arg})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range ips {
+		if ip := net.ParseIP(vals[i]); ip == nil {
+			t.Fatalf("invalid string being converted to IP address: %s", vals[i])
+		} else if !ip.Equal(v) {
+			t.Fatalf("expected ips[%d] to be %s but got: %s from GetIPSlice", i, vals[i], v)
+		}
+	}
+}
+
+func TestIPSDefault(t *testing.T) {
+	var ips []net.IP
+	f := setUpIPSFlagSetWithDefault(&ips)
+
+	vals := []string{"192.168.1.1", "0:0:0:0:0:0:0:1"}
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range ips {
+		if ip := net.ParseIP(vals[i]); ip == nil {
+			t.Fatalf("invalid string being converted to IP address: %s", vals[i])
+		} else if !ip.Equal(v) {
+			t.Fatalf("expected ips[%d] to be %s but got: %s", i, vals[i], v)
+		}
+	}
+
+	getIPS, err := f.GetIPSlice("ips")
+	if err != nil {
+		t.Fatal("got an error from GetIPSlice")
+	}
+	for i, v := range getIPS {
+		if ip := net.ParseIP(vals[i]); ip == nil {
+			t.Fatalf("invalid string being converted to IP address: %s", vals[i])
+		} else if !ip.Equal(v) {
+			t.Fatalf("expected ips[%d] to be %s but got: %s", i, vals[i], v)
+		}
+	}
+}
+
+func TestIPSWithDefault(t *testing.T) {
+	var ips []net.IP
+	f := setUpIPSFlagSetWithDefault(&ips)
+
+	vals := []string{"192.168.1.1", "0:0:0:0:0:0:0:1"}
+	arg := fmt.Sprintf("--ips=%s", strings.Join(vals, ","))
+	err := f.Parse([]string{arg})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range ips {
+		if ip := net.ParseIP(vals[i]); ip == nil {
+			t.Fatalf("invalid string being converted to IP address: %s", vals[i])
+		} else if !ip.Equal(v) {
+			t.Fatalf("expected ips[%d] to be %s but got: %s", i, vals[i], v)
+		}
+	}
+
+	getIPS, err := f.GetIPSlice("ips")
+	if err != nil {
+		t.Fatal("got an error from GetIPSlice")
+	}
+	for i, v := range getIPS {
+		if ip := net.ParseIP(vals[i]); ip == nil {
+			t.Fatalf("invalid string being converted to IP address: %s", vals[i])
+		} else if !ip.Equal(v) {
+			t.Fatalf("expected ips[%d] to be %s but got: %s", i, vals[i], v)
+		}
+	}
+}
+
+func TestIPSCalledTwice(t *testing.T) {
+	var ips []net.IP
+	f := setUpIPSFlagSet(&ips)
+
+	in := []string{"192.168.1.2,0:0:0:0:0:0:0:1", "10.0.0.1"}
+	expected := []net.IP{net.ParseIP("192.168.1.2"), net.ParseIP("0:0:0:0:0:0:0:1"), net.ParseIP("10.0.0.1")}
+	argfmt := "ips=%s"
+	arg1 := fmt.Sprintf(argfmt, in[0])
+	arg2 := fmt.Sprintf(argfmt, in[1])
+	err := f.Parse([]string{arg1, arg2})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range ips {
+		if !expected[i].Equal(v) {
+			t.Fatalf("expected ips[%d] to be %s but got: %s", i, expected[i], v)
+		}
+	}
+}
+
+func TestIPSBadQuoting(t *testing.T) {
+
+	tests := []struct {
+		Want    []net.IP
+		FlagArg []string
+	}{
+		{
+			Want: []net.IP{
+				net.ParseIP("a4ab:61d:f03e:5d7d:fad7:d4c2:a1a5:568"),
+				net.ParseIP("203.107.49.208"),
+				net.ParseIP("14.57.204.90"),
+			},
+			FlagArg: []string{
+				"a4ab:61d:f03e:5d7d:fad7:d4c2:a1a5:568",
+				"203.107.49.208",
+				"14.57.204.90",
+			},
+		},
+		{
+			Want: []net.IP{
+				net.ParseIP("204.228.73.195"),
+				net.ParseIP("86.141.15.94"),
+			},
+			FlagArg: []string{
+				"204.228.73.195",
+				"86.141.15.94",
+			},
+		},
+		{
+			Want: []net.IP{
+				net.ParseIP("c70c:db36:3001:890f:c6ea:3f9b:7a39:cc3f"),
+				net.ParseIP("4d17:1d6e:e699:bd7a:88c5:5e7e:ac6a:4472"),
+			},
+			FlagArg: []string{
+				"c70c:db36:3001:890f:c6ea:3f9b:7a39:cc3f",
+				"4d17:1d6e:e699:bd7a:88c5:5e7e:ac6a:4472",
+			},
+		},
+		{
+			Want: []net.IP{
+				net.ParseIP("5170:f971:cfac:7be3:512a:af37:952c:bc33"),
+				net.ParseIP("93.21.145.140"),
+				net.ParseIP("2cac:61d3:c5ff:6caf:73e0:1b1a:c336:c1ca"),
+			},
+			FlagArg: []string{
+				" 5170:f971:cfac:7be3:512a:af37:952c:bc33  , 93.21.145.140     ",
+				"2cac:61d3:c5ff:6caf:73e0:1b1a:c336:c1ca",
+			},
+		},
+		{
+			Want: []net.IP{
+				net.ParseIP("2e5e:66b2:6441:848:5b74:76ea:574c:3a7b"),
+				net.ParseIP("2e5e:66b2:6441:848:5b74:76ea:574c:3a7b"),
+				net.ParseIP("2e5e:66b2:6441:848:5b74:76ea:574c:3a7b"),
+				net.ParseIP("2e5e:66b2:6441:848:5b74:76ea:574c:3a7b"),
+			},
+			FlagArg: []string{
+				`"2e5e:66b2:6441:848:5b74:76ea:574c:3a7b,        2e5e:66b2:6441:848:5b74:76ea:574c:3a7b,2e5e:66b2:6441:848:5b74:76ea:574c:3a7b     "`,
+				" 2e5e:66b2:6441:848:5b74:76ea:574c:3a7b"},
+		},
+	}
+
+	for i, test := range tests {
+
+		var ips []net.IP
+		f := setUpIPSFlagSet(&ips)
+
+		if err := f.Parse([]string{fmt.Sprintf("--ips=%s", strings.Join(test.FlagArg, ","))}); err != nil {
+			t.Fatalf("flag parsing failed with error: %s\nparsing:\t%#v\nwant:\t\t%s",
+				err, test.FlagArg, test.Want[i])
+		}
+
+		for j, b := range ips {
+			if !b.Equal(test.Want[j]) {
+				t.Fatalf("bad value parsed for test %d on net.IP %d:\nwant:\t%s\ngot:\t%s", i, j, test.Want[j], b)
+			}
+		}
+	}
+}

vendor/github.com/spf13/pflag/ip_test.go

@@ -0,0 +1,63 @@
+package pflag
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"testing"
+)
+
+func setUpIP(ip *net.IP) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.IPVar(ip, "address", net.ParseIP("0.0.0.0"), "IP Address")
+	return f
+}
+
+func TestIP(t *testing.T) {
+	testCases := []struct {
+		input    string
+		success  bool
+		expected string
+	}{
+		{"0.0.0.0", true, "0.0.0.0"},
+		{" 0.0.0.0 ", true, "0.0.0.0"},
+		{"1.2.3.4", true, "1.2.3.4"},
+		{"127.0.0.1", true, "127.0.0.1"},
+		{"255.255.255.255", true, "255.255.255.255"},
+		{"", false, ""},
+		{"0", false, ""},
+		{"localhost", false, ""},
+		{"0.0.0", false, ""},
+		{"0.0.0.", false, ""},
+		{"0.0.0.0.", false, ""},
+		{"0.0.0.256", false, ""},
+		{"0 . 0 . 0 . 0", false, ""},
+	}
+
+	devnull, _ := os.Open(os.DevNull)
+	os.Stderr = devnull
+	for i := range testCases {
+		var addr net.IP
+		f := setUpIP(&addr)
+
+		tc := &testCases[i]
+
+		arg := fmt.Sprintf("--address=%s", tc.input)
+		err := f.Parse([]string{arg})
+		if err != nil && tc.success == true {
+			t.Errorf("expected success, got %q", err)
+			continue
+		} else if err == nil && tc.success == false {
+			t.Errorf("expected failure")
+			continue
+		} else if tc.success {
+			ip, err := f.GetIP("address")
+			if err != nil {
+				t.Errorf("Got error trying to fetch the IP flag: %v", err)
+			}
+			if ip.String() != tc.expected {
+				t.Errorf("expected %q, got %q", tc.expected, ip.String())
+			}
+		}
+	}
+}

vendor/github.com/spf13/pflag/ipmask.go

@@ -0,0 +1,122 @@
+package pflag
+
+import (
+	"fmt"
+	"net"
+	"strconv"
+)
+
+// -- net.IPMask value
+type ipMaskValue net.IPMask
+
+func newIPMaskValue(val net.IPMask, p *net.IPMask) *ipMaskValue {
+	*p = val
+	return (*ipMaskValue)(p)
+}
+
+func (i *ipMaskValue) String() string { return net.IPMask(*i).String() }
+func (i *ipMaskValue) Set(s string) error {
+	ip := ParseIPv4Mask(s)
+	if ip == nil {
+		return fmt.Errorf("failed to parse IP mask: %q", s)
+	}
+	*i = ipMaskValue(ip)
+	return nil
+}
+
+func (i *ipMaskValue) Type() string {
+	return "ipMask"
+}
+
+// ParseIPv4Mask written in IP form (e.g. 255.255.255.0).
+// This function should really belong to the net package.
+func ParseIPv4Mask(s string) net.IPMask {
+	mask := net.ParseIP(s)
+	if mask == nil {
+		if len(s) != 8 {
+			return nil
+		}
+		// net.IPMask.String() actually outputs things like ffffff00
+		// so write a horrible parser for that as well  :-(
+		m := []int{}
+		for i := 0; i < 4; i++ {
+			b := "0x" + s[2*i:2*i+2]
+			d, err := strconv.ParseInt(b, 0, 0)
+			if err != nil {
+				return nil
+			}
+			m = append(m, int(d))
+		}
+		s := fmt.Sprintf("%d.%d.%d.%d", m[0], m[1], m[2], m[3])
+		mask = net.ParseIP(s)
+		if mask == nil {
+			return nil
+		}
+	}
+	return net.IPv4Mask(mask[12], mask[13], mask[14], mask[15])
+}
+
+func parseIPv4Mask(sval string) (interface{}, error) {
+	mask := ParseIPv4Mask(sval)
+	if mask == nil {
+		return nil, fmt.Errorf("unable to parse %s as net.IPMask", sval)
+	}
+	return mask, nil
+}
+
+// GetIPv4Mask return the net.IPv4Mask value of a flag with the given name
+func (f *FlagSet) GetIPv4Mask(name string) (net.IPMask, error) {
+	val, err := f.getFlagType(name, "ipMask", parseIPv4Mask)
+	if err != nil {
+		return nil, err
+	}
+	return val.(net.IPMask), nil
+}
+
+// IPMaskVar defines an net.IPMask flag with specified name, default value, and usage string.
+// The argument p points to an net.IPMask variable in which to store the value of the flag.
+func (f *FlagSet) IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {
+	f.VarP(newIPMaskValue(value, p), name, "", usage)
+}
+
+// IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {
+	f.VarP(newIPMaskValue(value, p), name, shorthand, usage)
+}
+
+// IPMaskVar defines an net.IPMask flag with specified name, default value, and usage string.
+// The argument p points to an net.IPMask variable in which to store the value of the flag.
+func IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {
+	CommandLine.VarP(newIPMaskValue(value, p), name, "", usage)
+}
+
+// IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
+func IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {
+	CommandLine.VarP(newIPMaskValue(value, p), name, shorthand, usage)
+}
+
+// IPMask defines an net.IPMask flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPMask variable that stores the value of the flag.
+func (f *FlagSet) IPMask(name string, value net.IPMask, usage string) *net.IPMask {
+	p := new(net.IPMask)
+	f.IPMaskVarP(p, name, "", value, usage)
+	return p
+}
+
+// IPMaskP is like IPMask, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {
+	p := new(net.IPMask)
+	f.IPMaskVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// IPMask defines an net.IPMask flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPMask variable that stores the value of the flag.
+func IPMask(name string, value net.IPMask, usage string) *net.IPMask {
+	return CommandLine.IPMaskP(name, "", value, usage)
+}
+
+// IPMaskP is like IP, but accepts a shorthand letter that can be used after a single dash.
+func IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {
+	return CommandLine.IPMaskP(name, shorthand, value, usage)
+}

vendor/github.com/spf13/pflag/ipnet.go

@@ -0,0 +1,98 @@
+package pflag
+
+import (
+	"fmt"
+	"net"
+	"strings"
+)
+
+// IPNet adapts net.IPNet for use as a flag.
+type ipNetValue net.IPNet
+
+func (ipnet ipNetValue) String() string {
+	n := net.IPNet(ipnet)
+	return n.String()
+}
+
+func (ipnet *ipNetValue) Set(value string) error {
+	_, n, err := net.ParseCIDR(strings.TrimSpace(value))
+	if err != nil {
+		return err
+	}
+	*ipnet = ipNetValue(*n)
+	return nil
+}
+
+func (*ipNetValue) Type() string {
+	return "ipNet"
+}
+
+func newIPNetValue(val net.IPNet, p *net.IPNet) *ipNetValue {
+	*p = val
+	return (*ipNetValue)(p)
+}
+
+func ipNetConv(sval string) (interface{}, error) {
+	_, n, err := net.ParseCIDR(strings.TrimSpace(sval))
+	if err == nil {
+		return *n, nil
+	}
+	return nil, fmt.Errorf("invalid string being converted to IPNet: %s", sval)
+}
+
+// GetIPNet return the net.IPNet value of a flag with the given name
+func (f *FlagSet) GetIPNet(name string) (net.IPNet, error) {
+	val, err := f.getFlagType(name, "ipNet", ipNetConv)
+	if err != nil {
+		return net.IPNet{}, err
+	}
+	return val.(net.IPNet), nil
+}
+
+// IPNetVar defines an net.IPNet flag with specified name, default value, and usage string.
+// The argument p points to an net.IPNet variable in which to store the value of the flag.
+func (f *FlagSet) IPNetVar(p *net.IPNet, name string, value net.IPNet, usage string) {
+	f.VarP(newIPNetValue(value, p), name, "", usage)
+}
+
+// IPNetVarP is like IPNetVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPNetVarP(p *net.IPNet, name, shorthand string, value net.IPNet, usage string) {
+	f.VarP(newIPNetValue(value, p), name, shorthand, usage)
+}
+
+// IPNetVar defines an net.IPNet flag with specified name, default value, and usage string.
+// The argument p points to an net.IPNet variable in which to store the value of the flag.
+func IPNetVar(p *net.IPNet, name string, value net.IPNet, usage string) {
+	CommandLine.VarP(newIPNetValue(value, p), name, "", usage)
+}
+
+// IPNetVarP is like IPNetVar, but accepts a shorthand letter that can be used after a single dash.
+func IPNetVarP(p *net.IPNet, name, shorthand string, value net.IPNet, usage string) {
+	CommandLine.VarP(newIPNetValue(value, p), name, shorthand, usage)
+}
+
+// IPNet defines an net.IPNet flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPNet variable that stores the value of the flag.
+func (f *FlagSet) IPNet(name string, value net.IPNet, usage string) *net.IPNet {
+	p := new(net.IPNet)
+	f.IPNetVarP(p, name, "", value, usage)
+	return p
+}
+
+// IPNetP is like IPNet, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPNetP(name, shorthand string, value net.IPNet, usage string) *net.IPNet {
+	p := new(net.IPNet)
+	f.IPNetVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// IPNet defines an net.IPNet flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPNet variable that stores the value of the flag.
+func IPNet(name string, value net.IPNet, usage string) *net.IPNet {
+	return CommandLine.IPNetP(name, "", value, usage)
+}
+
+// IPNetP is like IPNet, but accepts a shorthand letter that can be used after a single dash.
+func IPNetP(name, shorthand string, value net.IPNet, usage string) *net.IPNet {
+	return CommandLine.IPNetP(name, shorthand, value, usage)
+}