[FrameworkBundle][config cmd] initialize extension.

src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php

@@ -14,6 +14,8 @@
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
 
 /**
  * A console command for dumping available configuration reference.
@@ -70,6 +72,8 @@ protected function findExtension($name)
             }
         }
 
+        $this->initializeExtensions($bundles);
+
         return $extension;
     }
 
@@ -83,4 +87,22 @@ public function validateConfiguration(ExtensionInterface $extension, $configurat
             throw new \LogicException(sprintf('Configuration class "%s" should implement ConfigurationInterface in order to be dumpable', get_class($configuration)));
         }
     }
+
+    private function initializeExtensions($bundles)
+    {
+        // Re-build bundle manually to initialize DI extensions that can be extended by other bundles in their build() method
+        // as this method is not called when the container is loaded from the cache.
+        $parameters = $this->getContainer()->getParameterBag()->all();
+        $container = new ContainerBuilder(new ParameterBag($parameters));
+        foreach ($bundles as $bundle) {
+            if ($extension = $bundle->getContainerExtension()) {
+                $container->registerExtension($extension);
+            }
+        }
+
+        foreach ($bundles as $bundle) {
+            $bundle = clone $bundle;
+            $bundle->build($container);
+        }
+    }
 }

src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/DependencyInjection/Config/CustomConfig.php

@@ -0,0 +1,24 @@
+<?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\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\DependencyInjection\Config;
+
+class CustomConfig
+{
+    public function addConfiguration($rootNode)
+    {
+        $rootNode
+            ->children()
+                ->scalarNode('custom')->end()
+            ->end()
+        ;
+    }
+}

src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/DependencyInjection/Configuration.php

@@ -0,0 +1,37 @@
+<?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\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\DependencyInjection;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class Configuration implements ConfigurationInterface
+{
+    private $customConfig;
+
+    public function __construct($customConfig = null)
+    {
+        $this->customConfig = $customConfig;
+    }
+
+    public function getConfigTreeBuilder()
+    {
+        $treeBuilder = new TreeBuilder();
+        $rootNode = $treeBuilder->root('test');
+
+        if ($this->customConfig) {
+            $this->customConfig->addConfiguration($rootNode);
+        }
+
+        return $treeBuilder;
+    }
+}

src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/DependencyInjection/TestExtension.php

@@ -0,0 +1,42 @@
+<?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\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\DependencyInjection;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+
+class TestExtension extends Extension
+{
+    private $customConfig;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function load(array $configs, ContainerBuilder $container)
+    {
+        $configuration = $this->getConfiguration($configs, $container);
+        $config = $this->processConfiguration($configuration, $configs);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getConfiguration(array $config, ContainerBuilder $container)
+    {
+        return new Configuration($this->customConfig);
+    }
+
+    public function setCustomConfig($customConfig)
+    {
+        $this->customConfig = $customConfig;
+    }
+}

src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/TestBundle.php

@@ -12,7 +12,18 @@
 namespace Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle;
 
 use Symfony\Component\HttpKernel\Bundle\Bundle;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\DependencyInjection\Config\CustomConfig;
 
 class TestBundle extends Bundle
 {
+    public function build(ContainerBuilder $container)
+    {
+        parent::build($container);
+
+        /** @var $extension DependencyInjection\TestExtension */
+        $extension = $container->getExtension('test');
+
+        $extension->setCustomConfig(new CustomConfig());
+    }
 }

src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDumpReferenceCommandTest.php

@@ -0,0 +1,52 @@
+<?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\Bundle\FrameworkBundle\Tests\Functional;
+
+use Symfony\Bundle\FrameworkBundle\Console\Application;
+use Symfony\Component\Console\Input\ArrayInput;
+use Symfony\Component\Console\Output\NullOutput;
+use Symfony\Component\Console\Tester\CommandTester;
+
+/**
+ * @group functional
+ */
+class ConfigDumpReferenceCommandTest extends WebTestCase
+{
+    private $application;
+
+    protected function setUp()
+    {
+        $kernel = static::createKernel(array('test_case' => 'ConfigDump', 'root_config' => 'config.yml'));
+        $this->application = new Application($kernel);
+        $this->application->doRun(new ArrayInput(array()), new NullOutput());
+    }
+
+    public function testDumpBundleName()
+    {
+        $tester = $this->createCommandTester();
+        $ret = $tester->execute(array('name' => 'TestBundle'));
+
+        $this->assertEquals(0, $ret, 'Returns 0 in case of success');
+        $this->assertContains('test:', $tester->getDisplay());
+        $this->assertContains('    custom:', $tester->getDisplay());
+    }
+
+    /**
+     * @return CommandTester
+     */
+    private function createCommandTester()
+    {
+        $command = $this->application->find('config:dump-reference');
+
+        return new CommandTester($command);
+    }
+}

src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ConfigDump/bundles.php

@@ -0,0 +1,9 @@
+<?php
+
+use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
+use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
+
+return array(
+    new FrameworkBundle(),
+    new TestBundle(),
+);

src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ConfigDump/config.yml

@@ -0,0 +1,2 @@
+imports:
+    - { resource: ../config/default.yml }