improves extensibility between bundles

src/Symfony/Component/HttpKernel/Bundle/Bundle.php

@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\HttpKernel\Bundle;
 
+use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
+
 use Symfony\Component\DependencyInjection\ContainerAware;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Container;
@@ -97,6 +99,13 @@ abstract class Bundle extends ContainerAware implements BundleInterface
         }
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    public function configureContainerExtension(ExtensionInterface $extension)
+    {
+    }
+
     /**
      * Gets the Bundle namespace.
      *

src/Symfony/Component/HttpKernel/Bundle/BundleInterface.php

@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\HttpKernel\Bundle;
 
+use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
+
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
 /**
@@ -56,6 +58,13 @@ interface BundleInterface
      */
     function getContainerExtension();
 
+    /**
+     * Allows the bundle to configure extensions of other bundles.
+     *
+     * @param ExtensionInterface $extension
+     */
+    function configureContainerExtension(ExtensionInterface $extension);
+
     /**
      * Returns the bundle parent name.
      *

src/Symfony/Component/HttpKernel/Kernel.php

@@ -628,6 +628,10 @@ abstract class Kernel implements KernelInterface
             $bundle->build($container);
 
             if ($extension = $bundle->getContainerExtension()) {
+                foreach ($this->bundles as $b) {
+                    $b->configureContainerExtension($extension);
+                }
+
                 $container->registerExtension($extension);
                 $extensions[] = $extension->getAlias();
             }