Create-project command remove all VCS history

In fact, there are some issues with create-project command.
When people create project with composer, they do not think to
delete main .git folder. So they embed 3th history in theirs own
repository. (see
https://connect.sensiolabs.com/profile/jmoati/project/gitoliteadmin
for instance)

More over, people may not use git.

composer.json

@@ -27,7 +27,8 @@
         "seld/jsonlint": "1.*",
         "symfony/console": "2.1.*",
         "symfony/finder": "2.1.*",
-        "symfony/process": "2.1.*"
+        "symfony/process": "2.1.*",
+        "symfony/filesystem": "2.1.*"
     },
     "suggest": {
         "ext-zip": "Enabling the zip extension allows you to unzip archives, and allows gzip compression of all internet traffic",

composer.lock

@@ -1,5 +1,5 @@
 {
-    "hash": "1023850095295cc1307c2219a0382930",
+    "hash": "f9e033da0cd0bd8d9fdb2e5999a7b20e",
     "packages": [
         {
             "name": "justinrainbow/json-schema",
@@ -103,6 +103,53 @@
             "description": "Symfony Console Component",
             "homepage": "http://symfony.com"
         },
+        {
+            "name": "symfony/filesystem",
+            "version": "v2.1.2",
+            "target-dir": "Symfony/Component/Filesystem",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/Filesystem",
+                "reference": "v2.1.2"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://github.com/symfony/Filesystem/zipball/v2.1.2",
+                "reference": "v2.1.2",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "time": "2012-08-22 06:48:41",
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.1-dev"
+                }
+            },
+            "installation-source": "dist",
+            "autoload": {
+                "psr-0": {
+                    "Symfony\\Component\\Filesystem": ""
+                }
+            },
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "http://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Filesystem Component",
+            "homepage": "http://symfony.com"
+        },
         {
             "name": "symfony/finder",
             "version": "v2.1.1",

src/Composer/Command/CreateProjectCommand.php

@@ -26,6 +26,8 @@ use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Filesystem\Filesystem;
+use Symfony\Component\Finder\Finder;
 use Composer\Json\JsonFile;
 use Composer\Util\RemoteFilesystem;
 use Composer\Package\Version\VersionParser;
@@ -50,7 +52,8 @@ class CreateProjectCommand extends Command
                 new InputOption('repository-url', null, InputOption::VALUE_REQUIRED, 'Pick a different repository url to look for the package.'),
                 new InputOption('dev', null, InputOption::VALUE_NONE, 'Whether to install dependencies for development.'),
                 new InputOption('no-custom-installers', null, InputOption::VALUE_NONE, 'Whether to disable custom installers.'),
-                new InputOption('no-scripts', null, InputOption::VALUE_NONE, 'Whether to prevent execution of all defined scripts in the root package.')
+                new InputOption('no-scripts', null, InputOption::VALUE_NONE, 'Whether to prevent execution of all defined scripts in the root package.'),
+                new InputOption('keep-vcs', null, InputOption::VALUE_NONE, 'Whether to prevent deletion vcs folder.'),
             ))
             ->setHelp(<<<EOT
 The <info>create-project</info> command creates a new project from a given
@@ -84,11 +87,12 @@ EOT
             $input->getOption('dev'),
             $input->getOption('repository-url'),
             $input->getOption('no-custom-installers'),
-            $input->getOption('no-scripts')
+            $input->getOption('no-scripts'),
+            $input->getOption('keep-vcs')
         );
     }
 
-    public function installProject(IOInterface $io, $packageName, $directory = null, $packageVersion = null, $preferSource = false, $installDevPackages = false, $repositoryUrl = null, $disableCustomInstallers = false, $noScripts = false)
+    public function installProject(IOInterface $io, $packageName, $directory = null, $packageVersion = null, $preferSource = false, $installDevPackages = false, $repositoryUrl = null, $disableCustomInstallers = false, $noScripts = false, $keepVcs = false)
     {
         $config = Factory::createConfig();
 
@@ -183,6 +187,25 @@ EOT
         }
 
         $installer->run();
+
+        if (!$keepVcs && (
+            !$io->isInteractive() ||
+            $io->askConfirmation('<info>Do you want remove all previous VCS history ?</info> [<comment>yes</comment>]: ', true)
+            )
+        ) {
+            $finder = new Finder();
+            $finder->in($directory)->ignoreVCS(false)->ignoreDotFiles(false);
+            foreach (array('.svn', '_svn', 'CVS', '_darcs', '.arch-params', '.monotone', '.bzr', '.git', '.hg') as $vcsName) {
+                $finder->name($vcsName);
+            }
+
+            $fs = new Filesystem();
+            try {
+                $fs->remove($finder);
+            } catch (IOException $e) {
+                $io->write("<error>An error occured while removing the .git directory</error>", true);
+            }
+        }
     }
 
     protected function createDownloadManager(IOInterface $io, Config $config)