NEW: Rewrite self.version in create-project (Fixes #1351)

When composer create-project is called and the resulting project is disconnected from the
parent repo, self.version references no longer work.  To fix that, this patch rewrites
self.version to the actual version number as part of 'composer create-project' execution

src/Composer/Command/CreateProjectCommand.php

@@ -35,6 +35,7 @@ use Composer\Json\JsonFile;
 use Composer\Util\Filesystem;
 use Composer\Util\RemoteFilesystem;
 use Composer\Package\Version\VersionParser;
+use Composer\Json\JsonManipulator;
 
 /**
  * Install a package as new project into new directory.
@@ -235,6 +236,7 @@ EOT
             return 1;
         }
 
+        $vcsWasRemoved = false;
         if (!$keepVcs && $installedFromVcs
             && (
                 !$io->isInteractive()
@@ -259,11 +261,47 @@ EOT
             } catch (\Exception $e) {
                 $io->write('<error>An error occurred while removing the VCS metadata: '.$e->getMessage().'</error>');
             }
+
+            $vcsWasRemoved = true;
+        }
+
+        // Rewriting self.version dependencies with explicit version numbers
+        if($vcsWasRemoved || !$installedFromVcs) {
+            $package = $composer->getPackage();
+            $requires = $package->getRequires();
+
+            $requirementsToUpdate = array();
+            foreach($requires as $require) {
+                if($require->getPrettyConstraint() == 'self.version') {
+                    $requirementsToUpdate[] = $require->getTarget();
+                }
+            }
+
+            if($requirementsToUpdate) {
+                $io->write("<info>Rewriting self.version entries for " . implode(", ",$requirementsToUpdate) . " to " . $package->getVersion() . "</info>");
+                $this->rewriteSelfVersion(Factory::getComposerFile(), $requirementsToUpdate, $package->getVersion());
+            }
         }
 
         return 0;
     }
 
+    private function rewriteSelfVersion($filename, array $packages, $newVersion)
+    {
+        $contents = file_get_contents($filename);
+        $manipulator = new JsonManipulator($contents);
+
+        foreach ($packages as $package) {
+            if (!$manipulator->addLink('require', $package, $newVersion)) {
+                return false;
+            }
+        }
+
+        file_put_contents($filename, $manipulator->getContents());
+
+        return true;
+    }
+
     protected function createDownloadManager(IOInterface $io, Config $config)
     {
         $factory = new Factory();