Symfony2: Is it possible to add configuration for another bundle via DependencyInjection?

Question

In Symfony2's config.yml you can add an "import" such as:

imports:
    - { resource: services.yml }

Inside my services.yml I then have:

imports:
    security_bundle:
      resource: @AcmeSecurityBundle/Resources/config/services.yml

However the alternative way to declare services for a bundle is by using a DependencyInjection Extension thus eliminating the need to import anything into config.yml manually thus decoupling the code.

namespace Acme\Bundle\SecurityBundle\DependencyInjection;

use Symfony\Component\HttpKernel\DependencyInjection\Extension;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
use Symfony\Component\Config\FileLocator;

class AcmeSecurityExtension extends Extension {

    public function load(array $configs, ContainerBuilder $container) {
        $loader = new YamlFileLoader(
            $container, new FileLocator(__DIR__ . '/../Resources/config')
        );
        $loader->load('services.yml');
    }

}

The Question This works fine for service declarations but say for instance you want a bundle to configure another bundle such as adding LiipImagineBundle (it's like AvalancheImagineBundle) filters:

liip_imagine:
    filter_sets:
      security_avatar_thumbnail:
        quality: 75
        filters:
          thumbnail: { size: [140, 140], mode: inset }

Symfony then complains that

There is no extension able to load the configuration for "liip_imagine"

So does anyone know if there is a way to add configuration for third party bundle from another bundle without touching config.yml?

Answer 1

In Symfony 2.2 it is possible with help of PrependExtensionInterface.

Take a look at the "How to simplify configuration of multiple Bundles" cookbook entry:

http://symfony.com/doc/current/cookbook/bundles/prepend_extension.html