Issue #1424924 by Rob Loach: Added Use Composer for updating Symfony...

Issue #1424924 by Rob Loach: Added Use Composer for updating Symfony components (without removing Symfony code from repo).

core/composer.json

+{
+  "require": {
+    "symfony/class-loader": "2.1.*",
+    "symfony/dependency-injection": "2.1.*",
+    "symfony/event-dispatcher": "2.1.*",
+    "symfony/http-foundation": "2.1.*",
+    "symfony/http-kernel": "2.1.*",
+    "symfony/routing": "2.1.*",
+    "symfony/yaml": "2.1.*",
+    "twig/twig": "1.8.*"
+  },
+  "minimum-stability": "beta"
+}

core/composer.lock

+{
+    "hash": "ec77094fc475b57afb7a27f63983ead1",
+    "packages": [
+        {
+            "package": "symfony/class-loader",
+            "version": "v2.1.0-BETA1"
+        },
+        {
+            "package": "symfony/dependency-injection",
+            "version": "v2.1.0-BETA1"
+        },
+        {
+            "package": "symfony/event-dispatcher",
+            "version": "v2.1.0-BETA1"
+        },
+        {
+            "package": "symfony/http-foundation",
+            "version": "v2.1.0-BETA1"
+        },
+        {
+            "package": "symfony/http-kernel",
+            "version": "v2.1.0-BETA1"
+        },
+        {
+            "package": "symfony/routing",
+            "version": "v2.1.0-BETA1"
+        },
+        {
+            "package": "symfony/yaml",
+            "version": "v2.1.0-BETA1"
+        },
+        {
+            "package": "twig/twig",
+            "version": "v1.8.3"
+        }
+    ],
+    "packages-dev": null,
+    "aliases": [
+
+    ],
+    "minimum-stability": "beta",
+    "stability-flags": [
+
+    ]
+}

core/includes/bootstrap.inc

@@ -2994,13 +2994,13 @@ function drupal_classloader() {
 
   if (!isset($loader)) {
     // Include the Symfony ClassLoader for loading PSR-0-compatible classes.
-    require_once DRUPAL_ROOT . '/core/vendor/Symfony/Component/ClassLoader/UniversalClassLoader.php';
+    require_once DRUPAL_ROOT . '/core/vendor/symfony/class-loader/Symfony/Component/ClassLoader/UniversalClassLoader.php';
 
     // @todo Use a cleaner way than variable_get() to switch autoloaders.
     switch (variable_get('autoloader_mode', 'default')) {
       case 'apc':
         if (function_exists('apc_store')) {
-          require_once DRUPAL_ROOT . '/core/vendor/Symfony/Component/ClassLoader/ApcUniversalClassLoader.php';
+          require_once DRUPAL_ROOT . '/core/vendor/symfony/class-loader/Symfony/Component/ClassLoader/ApcUniversalClassLoader.php';
           $loader = new ApcUniversalClassLoader('drupal.' . $GLOBALS['drupal_hash_salt']);
           break;
         }
@@ -3015,13 +3015,19 @@ function drupal_classloader() {
 
     // Register explicit PSR-0 vendor namespaces.
     $loader->registerNamespaces(array(
-      // All Symfony-borrowed code lives in /core/vendor/Symfony.
-      'Symfony' => DRUPAL_ROOT . '/core/vendor',
+      // All Symfony-borrowed code lives in /core/vendor/symfony.
+      'Symfony\Component\ClassLoader' => DRUPAL_ROOT . '/core/vendor/symfony/class-loader',
+      'Symfony\Component\DependencyInjection' => DRUPAL_ROOT . '/core/vendor/symfony/dependency-injection',
+      'Symfony\Component\EventDispatcher' => DRUPAL_ROOT . '/core/vendor/symfony/event-dispatcher',
+      'Symfony\Component\HttpFoundation' => DRUPAL_ROOT . '/core/vendor/symfony/http-foundation',
+      'Symfony\Component\HttpKernel' => DRUPAL_ROOT . '/core/vendor/symfony/http-kernel',
+      'Symfony\Component\Routing' => DRUPAL_ROOT . '/core/vendor/symfony/routing',
+      'Symfony\Component\Yaml' => DRUPAL_ROOT . '/core/vendor/symfony/yaml',
     ));
     // Register PEAR-style vendor namespaces.
     $loader->registerPrefixes(array(
-      // All Twig-borrowed code lives in /core/vendor/Twig.
-      'Twig' => DRUPAL_ROOT . '/core/vendor',
+      // All Twig-borrowed code lives in /core/vendor/twig.
+      'Twig' => DRUPAL_ROOT . '/core/vendor/twig/twig/lib',
     ));
     // Register the Drupal namespace for classes in core as a fallback.
     // This allows to register additional namespaces within the Drupal namespace

core/vendor/.gitignore

+# SimpleTest breaks with the following files, so avoid adding them.
+symfony/dependency-injection/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1-1.php
+symfony/class-loader/Symfony/Component/ClassLoader/Tests/Fixtures/php5.4/traits.php

core/vendor/Symfony/Component/ClassLoader/ApcClassLoader.php

-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\Component\ClassLoader;
-
-/**
- * ApcClassLoader implements a wrapping autoloader cached in APC for PHP 5.3.
- *
- * It expects an object implementing a findFile method to find the file. This
- * allow using it as a wrapper around the other loaders of the component (the
- * ClassLoader and the UniversalClassLoader for instance) but also around any
- * other autoloader following this convention (the Composer one for instance)
- *
- *     $loader = new ClassLoader();
- *
- *     // register classes with namespaces