symfony/src/Symfony/Bundle/AsseticBundle/DependencyInjection/Configuration.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien.potencier@symfony-project.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\Config\Definition\Builder\TreeBuilder;

/**
 * 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>
 */
class Configuration
{
    /**
     * Generates the configuration tree.
     *
     * @return Symfony\Component\Config\Definition\NodeInterface The config tree
     */
    public function getConfigTree($debug, $bundles)
    {
        $tree = new TreeBuilder();
        $tree->root('assetic', 'array')
            ->booleanNode('debug')->defaultValue($debug)->end()
            ->booleanNode('use_controller')->defaultValue($debug)->end()
            ->scalarNode('read_from')->defaultValue('%kernel.root_dir%/../web')->end()
            ->scalarNode('write_to')->defaultValue('%assetic.read_from%')->end()
            ->scalarNode('closure')->end()
            ->scalarNode('yui')->end()
            ->scalarNode('default_javascripts_output')->defaultValue('js/*.js')->end()
            ->scalarNode('default_stylesheets_output')->defaultValue('css/*.css')->end()
            ->fixXmlConfig('bundle')
            ->arrayNode('bundles')
                ->defaultValue($bundles)
                ->requiresAtLeastOneElement()
                ->beforeNormalization()
                    ->ifTrue(function($v){ return !is_array($v); })
                    ->then(function($v){ return array($v); })
                ->end()
                ->prototype('scalar')
                    ->beforeNormalization()
                        ->ifTrue(function($v) { return is_array($v) && isset($v['name']); })
                        ->then(function($v){ return $v['name']; })
                    ->end()
                ->end()
            ->end();

        return $tree->buildTree();
    }
}