Remove persistence of alias data, make abstract branch aliasing and keep it in composer only

src/Composer/Factory.php

@@ -130,7 +130,7 @@ class Factory
 
     protected function addLocalRepository(RepositoryManager $rm, $vendorDir)
     {
-        $rm->setLocalRepository(new Repository\FilesystemRepository(new JsonFile($vendorDir.'/.composer/installed.json')));
+        $rm->setLocalRepository(new Repository\InstalledFilesystemRepository(new JsonFile($vendorDir.'/.composer/installed.json')));
     }
 
     protected function addPackagistRepository(RepositoryManager $rm)

src/Composer/Installer/InstallationManager.php

@@ -127,6 +127,7 @@ class InstallationManager
         $package = $operation->getPackage();
         if ($package instanceof AliasPackage) {
             $package = $package->getAliasOf();
+            $package->setInstalledAsAlias(true);
         }
         $installer = $this->getInstaller($package->getType());
         $installer->install($package);
@@ -146,6 +147,7 @@ class InstallationManager
         $target  = $operation->getTargetPackage();
         if ($target instanceof AliasPackage) {
             $target = $target->getAliasOf();
+            $target->setInstalledAsAlias(true);
         }
 
         $initialType = $initial->getType();

src/Composer/Package/Dumper/ArrayDumper.php

@@ -43,11 +43,6 @@ class ArrayDumper
         $data['version'] = $package->getPrettyVersion();
         $data['version_normalized'] = $package->getVersion();
 
-        if ($package->getAlias()) {
-            $data['alias'] = $package->getPrettyAlias();
-            $data['alias_normalized'] = $package->getAlias();
-        }
-
         if ($package->getTargetDir()) {
             $data['target-dir'] = $package->getTargetDir();
         }

src/Composer/Package/Loader/ArrayLoader.php

@@ -134,10 +134,28 @@ class ArrayLoader
             $package->setDistSha1Checksum(isset($config['dist']['shasum']) ? $config['dist']['shasum'] : null);
         }
 
-        // load alias for named dev packages
-        if (!empty($config['alias']) && 'dev-' === substr($package->getPrettyVersion(), 0, 4)) {
-            $package->setAlias($config['alias_normalized']);
-            $package->setPrettyAlias($config['alias']);
+        // check for a branch alias (dev-master => 1.0.x-dev for example) if this is a named branch
+        if ('dev-' === substr($package->getPrettyVersion(), 0, 4) && isset($config['extra']['branch-alias']) && is_array($config['extra']['branch-alias'])) {
+            foreach ($config['extra']['branch-alias'] as $sourceBranch => $targetBranch) {
+                // ensure it is an alias to a -dev package
+                if ('-dev' !== substr($targetBranch, -4)) {
+                    continue;
+                }
+                // normalize without -dev and ensure it's a numeric branch that is parseable
+                $validatedTargetBranch = $this->versionParser->normalizeBranch(substr($targetBranch, 0, -4));
+                if ('-dev' !== substr($validatedTargetBranch, -4)) {
+                    continue;
+                }
+
+                // ensure that it is the current branch aliasing itself
+                if (strtolower($package->getPrettyVersion()) !== strtolower($sourceBranch)) {
+                    continue;
+                }
+
+                $package->setAlias($validatedTargetBranch);
+                $package->setPrettyAlias($targetBranch);
+                break;
+            }
         }
 
         foreach (Package\BasePackage::$supportedLinkTypes as $type => $description) {

src/Composer/Package/Locker.php

@@ -139,8 +139,7 @@ class Locker
             if ($package->isDev()) {
                 $spec['source-reference'] = $package->getSourceReference();
             }
-            // TODO discriminate between really installed as alias and installed as real package
-            if ($package->getAlias()) {
+            if ($package->getAlias() && $package->isInstalledAsAlias()) {
                 $spec['alias'] = $package->getAlias();
             }
 

src/Composer/Package/MemoryPackage.php

@@ -44,6 +44,7 @@ class MemoryPackage extends BasePackage
     protected $aliases = array();
     protected $alias;
     protected $prettyAlias;
+    protected $installedAsAlias;
     protected $dev;
 
     protected $requires = array();
@@ -207,6 +208,24 @@ class MemoryPackage extends BasePackage
         return $this->prettyAlias;
     }
 
+    /**
+     * Enabled if the package is installed from its alias package
+     *
+     * @param string $installedAsAlias
+     */
+    public function setInstalledAsAlias($installedAsAlias)
+    {
+        $this->installedAsAlias = $installedAsAlias;
+    }
+
+    /**
+     * @return string
+     */
+    public function isInstalledAsAlias()
+    {
+        return $this->installedAsAlias;
+    }
+
     /**
      * {@inheritDoc}
      */

src/Composer/Repository/ArrayRepository.php

@@ -95,6 +95,11 @@ class ArrayRepository implements RepositoryInterface
         }
         $package->setRepository($this);
         $this->packages[] = $package;
+
+        // create alias package on the fly if needed (installed repos manage aliases themselves)
+        if ($package->getAlias() && !$this instanceof InstalledRepositoryInterface) {
+            $this->addPackage($this->createAliasPackage($package));
+        }
     }
 
     protected function createAliasPackage(PackageInterface $package)

src/Composer/Repository/FilesystemRepository.php

@@ -54,12 +54,15 @@ class FilesystemRepository extends ArrayRepository implements WritableRepository
         }
 
         $loader = new ArrayLoader();
-        foreach ($packages as $package) {
-            $package = $loader->load($package);
-            // TODO discriminate between really installed as alias and installed as real package
-            if ($package->getAlias()) {
+        foreach ($packages as $packageData) {
+            $package = $loader->load($packageData);
+
+            // package was installed as alias, so we only add the alias
+            if ($this instanceof InstalledRepositoryInterface && !empty($packageData['installed-as-alias'])) {
+                $package->setInstalledAsAlias(true);
                 $this->addPackage($this->createAliasPackage($package));
             } else {
+                // only add regular package - if it's not an installed repo the alias will be created on the fly
                 $this->addPackage($package);
             }
         }
@@ -73,7 +76,11 @@ class FilesystemRepository extends ArrayRepository implements WritableRepository
         $packages = array();
         $dumper   = new ArrayDumper();
         foreach ($this->getPackages() as $package) {
-            $packages[] = $dumper->dump($package);
+            $data = $dumper->dump($package);
+            if ($this instanceof InstalledRepositoryInterface && $package->isInstalledAsAlias()) {
+                $data['installed-as-alias'] = true;
+            }
+            $packages[] = $data;
         }
 
         $this->file->write($packages);

src/Composer/Repository/InstalledFilesystemRepository.php

@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Repository;
+
+use Composer\Json\JsonFile;
+use Composer\Package\PackageInterface;
+use Composer\Package\Loader\ArrayLoader;
+use Composer\Package\Dumper\ArrayDumper;
+
+/**
+ * Installed filesystem repository.
+ *
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ */
+class InstalledFilesystemRepository extends FilesystemRepository implements InstalledRepositoryInterface
+{
+}

src/Composer/Repository/InstalledRepositoryInterface.php

@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Repository;
+
+use Composer\Package\PackageInterface;
+
+/**
+ * Installable repository interface.
+ *
+ * Just used to tag installed repositories so the base classes can act differently on Alias packages
+ *
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ */
+interface InstalledRepositoryInterface
+{
+}

src/Composer/Repository/VcsRepository.php

@@ -185,36 +185,9 @@ class VcsRepository extends ArrayRepository
             $data['source'] = $driver->getSource($identifier);
         }
 
-        // check for a branch alias (dev-master => 1.0.x-dev for example) if this is a named branch
-        if ('dev-' === substr($data['version'], 0, 4) && isset($data['extra']['branch-alias']) && is_array($data['extra']['branch-alias'])) {
-            foreach ($data['extra']['branch-alias'] as $sourceBranch => $targetBranch) {
-                // ensure it is an alias to a numeric branch that is parseable
-                if (!($validatedTargetBranch = $this->validateBranch($targetBranch)) || '-dev' !== substr($validatedTargetBranch, -4)) {
-                    continue;
-                }
-                // ensure that it is the current branch aliasing itself
-                if ($data['version'] !== $sourceBranch && substr($data['version'], 4) !== $sourceBranch) {
-                    continue;
-                }
-
-                $data['alias'] = $targetBranch.'-dev';
-                $data['alias_normalized'] = $validatedTargetBranch;
-                break;
-            }
-        }
-
         return $data;
     }
 
-    public function addPackage(PackageInterface $package)
-    {
-        parent::addPackage($package);
-
-        if ($package->getAlias()) {
-            $this->addPackage($this->createAliasPackage($package));
-        }
-    }
-
     private function validateBranch($branch)
     {
         try {