vendor/sensio/generator-bundle/Manipulator/KernelManipulator.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 Sensio\Bundle\GeneratorBundle\Manipulator;

use Symfony\Component\HttpKernel\KernelInterface;

/**
 * Changes the PHP code of a Kernel.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class KernelManipulator extends Manipulator
{
    protected $kernel;
    protected $reflected;

    public function __construct(KernelInterface $kernel)
    {
        $this->kernel = $kernel;
        $this->reflected = new \ReflectionObject($kernel);
    }

    /**
     * Adds a bundle at the end of the existing ones.
     *
     * @param string $bundle The bundle class name
     *
     * @return bool Whether the operation succeeded
     *
     * @throws \RuntimeException If bundle is already defined
     */
    public function addBundle($bundle)
    {
        if (!$this->getFilename()) {
            return false;
        }

        $src = file($this->getFilename());
        $method = $this->reflected->getMethod('registerBundles');
        $lines = array_slice($src, $method->getStartLine() - 1, $method->getEndLine() - $method->getStartLine() + 1);

        // Don't add same bundle twice
        if (false !== strpos(implode('', $lines), $bundle)) {
            throw new \RuntimeException(sprintf('Bundle "%s" is already defined in "AppKernel::registerBundles()".', $bundle));
        }

        $this->setCode(token_get_all('<?php '.implode('', $lines)), $method->getStartLine());

        while ($token = $this->next()) {
            // $bundles
            if (T_VARIABLE !== $token[0] || '$bundles' !== $token[1]) {