vendor/symfony/symfony/src/Symfony/Bundle/TwigBundle/DependencyInjection/TwigExtension.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\TwigBundle\DependencyInjection;

use Symfony\Component\Config\FileLocator;
use Symfony\Component\Config\Resource\FileExistenceResource;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
use Symfony\Component\HttpKernel\DependencyInjection\Extension;

/**
 * TwigExtension.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Jeremy Mikola <jmikola@gmail.com>
 */
class TwigExtension extends Extension
{
    /**
     * Responds to the twig configuration parameter.
     *
     * @param array            $configs
     * @param ContainerBuilder $container
     */
    public function load(array $configs, ContainerBuilder $container)
    {
        $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
        $loader->load('twig.xml');

        if (class_exists('Symfony\Component\Form\Form')) {
            $loader->load('form.xml');
        }

        if (interface_exists('Symfony\Component\Templating\EngineInterface')) {
            $loader->load('templating.xml');
        }

        if (!interface_exists('Symfony\Component\Translation\TranslatorInterface')) {
            $container->removeDefinition('twig.translation.extractor');
        }

        foreach ($configs as $key => $config) {
            if (isset($config['globals'])) {
                foreach ($config['globals'] as $name => $value) {
                    if (is_array($value) && isset($value['key'])) {
                        $configs[$key]['globals'][$name] = array(
                            'key' => $name,
                            'value' => $value,
                        );
                    }