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

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<?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\AsseticBundle\DependencyInjection;

use Symfony\Component\Process\ExecutableFinder;
use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
use Symfony\Component\Config\Definition\Builder\TreeBuilder;
use Symfony\Component\Config\Definition\ConfigurationInterface;

/**
 * This class contains the configuration information for the bundle
 *
 * This information is solely responsible for how the different configuration
 * sections are normalized, and merged.
 *
 * @author Christophe Coevoet <stof@notk.org>
 * @author Kris Wallsmith <kris@symfony.com>
 */
class Configuration implements ConfigurationInterface
{
    private $bundles;

    /**
     * Constructor
     *
     * @param array $bundles An array of bundle names
     */
    public function __construct(array $bundles)
    {
        $this->bundles = $bundles;
    }

    /**
     * Generates the configuration tree builder.
     *
     * @return \Symfony\Component\Config\Definition\Builder\TreeBuilder The tree builder
     */
    public function getConfigTreeBuilder()
    {
        $builder = new TreeBuilder();
        $finder = new ExecutableFinder();
        $rootNode = $builder->root('assetic');

        $rootNode
            ->children()
                ->booleanNode('debug')->defaultValue('%kernel.debug%')->end()
                ->arrayNode('use_controller')
                    ->addDefaultsIfNotSet()
                    ->treatTrueLike(array('enabled' => true))
                    ->treatFalseLike(array('enabled' => false))
                    ->children()