Added packagist repository as the last repository with the lowest priority

src/Composer/Factory.php

@@ -78,17 +78,7 @@ class Factory
         $rm = $this->createRepositoryManager($io);
 
         // load default repository unless it's explicitly disabled
-        $loadPackagist = true;
-        if (isset($packageConfig['repositories'])) {
-            foreach ($packageConfig['repositories'] as $repo) {
-                if (isset($repo['packagist']) && $repo['packagist'] === false) {
-                    $loadPackagist = false;
-                }
-            }
-        }
-        if ($loadPackagist) {
-            $this->addPackagistRepository($rm);
-        }
+        $packageConfig = $this->addPackagistRepository($packageConfig);
 
         // load local repository
         $this->addLocalRepository($rm, $vendorDir);
@@ -134,9 +124,32 @@ class Factory
         $rm->setLocalRepository(new Repository\InstalledFilesystemRepository(new JsonFile($vendorDir.'/.composer/installed.json')));
     }
 
-    protected function addPackagistRepository(RepositoryManager $rm)
+    protected function addPackagistRepository(array $packageConfig)
     {
-        $rm->addRepository(new Repository\ComposerRepository(array('url' => 'http://packagist.org')));
+        $loadPackagist = true;
+        $packagistConfig = array(
+                'type' => 'composer',
+                'url' => 'http://packagist.org'
+        );
+        if (isset($packageConfig['repositories'])) {
+            foreach ($packageConfig['repositories'] as $key => $repo) {
+                if (isset($repo['packagist'])) {
+                    if (true === $repo['packagist']) {
+                        $packageConfig['repositories'][$key] = $packagistConfig;
+                    }
+
+                    $loadPackagist = false;
+                }
+            }
+        } else {
+            $packageConfig['repositories'] = array();
+        }
+
+        if ($loadPackagist) {
+            $packageConfig['repositories'][] = $packagistConfig;
+        }
+
+        return $packageConfig;
     }
 
     protected function createDownloadManager(IOInterface $io)

tests/Composer/Test/FactoryTest.php

@@ -0,0 +1,65 @@
+<?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\Test;
+
+use Composer\Factory;
+
+class FactoryTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @dataProvider dataAddPackagistRepository
+     */
+    public function testAddPackagistRepository($expected, $config)
+    {
+        $factory = new Factory();
+
+        $ref = new \ReflectionMethod($factory, 'addPackagistRepository');
+        $ref->setAccessible(true);
+
+        $this->assertEquals($expected, $ref->invoke($factory, $config));
+    }
+
+    public function dataAddPackagistRepository()
+    {
+        $f = function() {
+            $repositories = func_get_args();
+            return array('repositories' => $repositories);
+        };
+
+        $data = array();
+        $data[] = array(
+            $f(array('type' => 'composer', 'url' => 'http://packagist.org')),
+            $f()
+        );
+
+        $data[] = array(
+            $f(array('packagist' => false)),
+            $f(array('packagist' => false))
+        );
+
+        $data[] = array(
+            $f(
+                array('type' => 'vcs', 'url' => 'git://github.com/composer/composer.git'),
+                array('type' => 'composer', 'url' => 'http://packagist.org'),
+                array('type' => 'pear', 'url' => 'http://pear.composer.org')
+            ),
+            $f(
+                array('type' => 'vcs', 'url' => 'git://github.com/composer/composer.git'),
+                array('packagist' => true),
+                array('type' => 'pear', 'url' => 'http://pear.composer.org')
+            )
+        );
+
+        return $data;
+    }
+}