vendor/symfony/assetic-bundle/DependencyInjection/AsseticExtension.php

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<?php

/*
 * This file is part of the Symfony framework.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace Symfony\Bundle\AsseticBundle\DependencyInjection;

use Symfony\Component\Config\Definition\Processor;
use Symfony\Component\Config\FileLocator;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\DefinitionDecorator;
use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\HttpKernel\DependencyInjection\Extension;

/**
 * Semantic asset configuration.
 *
 * @author Kris Wallsmith <kris@symfony.com>
 */
class AsseticExtension extends Extension
{
    /**
     * Loads the configuration.
     *
     * @param array            $configs   An array of configuration settings
     * @param ContainerBuilder $container A ContainerBuilder instance
     */
    public function load(array $configs, ContainerBuilder $container)
    {
        $loader = new XmlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
        $loader->load('assetic.xml');
        $loader->load('templating_twig.xml');
        $loader->load('templating_php.xml');

        $def = $container->getDefinition('assetic.parameter_bag');
        if (method_exists($def, 'setFactory')) {
            // to be inlined in assetic.xml when dependency on Symfony DependencyInjection is bumped to 2.6
            $def->setFactory(array(new Reference('service_container'), 'getParameterBag'));
        } else {
            // to be removed when dependency on Symfony DependencyInjection is bumped to 2.6
            $def->setFactoryService('service_container');
            $def->setFactoryMethod('getParameterBag');
        }

        $processor = new Processor();
        $configuration = $this->getConfiguration($configs, $container);
        $config = $processor->processConfiguration($configuration, $configs);

        $container->setParameter('assetic.debug', $config['debug']);
        $container->setParameter('assetic.use_controller', $config['use_controller']['enabled']);
        $container->setParameter('assetic.enable_profiler', $config['use_controller']['profiler']);
        $container->setParameter('assetic.read_from', $config['read_from']);
        $container->setParameter('assetic.write_to', $config['write_to']);