public function generateBundle(Bundle $bundle)
 {
     $dir = $bundle->getTargetDirectory();
     if (file_exists($dir)) {
         if (!is_dir($dir)) {
             throw new \RuntimeException(sprintf('Unable to generate the bundle as the target directory "%s" exists but is a file.', realpath($dir)));
         }
         $files = scandir($dir);
         if ($files != array('.', '..')) {
             throw new \RuntimeException(sprintf('Unable to generate the bundle as the target directory "%s" is not empty.', realpath($dir)));
         }
         if (!is_writable($dir)) {
             throw new \RuntimeException(sprintf('Unable to generate the bundle as the target directory "%s" is not writable.', realpath($dir)));
         }
     }
     $parameters = array('namespace' => $bundle->getNamespace(), 'bundle' => $bundle->getName(), 'format' => $bundle->getConfigurationFormat(), 'bundle_basename' => $bundle->getBasename(), 'extension_alias' => $bundle->getExtensionAlias());
     $this->renderFile('bundle/Bundle.php.twig', $dir . '/' . $bundle->getName() . '.php', $parameters);
     if ($bundle->shouldGenerateDependencyInjectionDirectory()) {
         $this->renderFile('bundle/Extension.php.twig', $dir . '/DependencyInjection/' . $bundle->getBasename() . 'Extension.php', $parameters);
         $this->renderFile('bundle/Configuration.php.twig', $dir . '/DependencyInjection/Configuration.php', $parameters);
     }
     $this->renderFile('bundle/DefaultController.php.twig', $dir . '/Controller/DefaultController.php', $parameters);
     $this->renderFile('bundle/DefaultControllerTest.php.twig', $dir . '/Tests/Controller/DefaultControllerTest.php', $parameters);
     $this->renderFile('bundle/index.html.twig.twig', $dir . '/Resources/views/Default/index.html.twig', $parameters);
     // render the services.yml/xml file
     $servicesFilename = $bundle->getServicesConfigurationFilename();
     $this->renderFile(sprintf('bundle/%s.twig', $servicesFilename), $dir . '/Resources/config/' . $servicesFilename, $parameters);
     if ($routingFilename = $bundle->getRoutingConfigurationFilename()) {
         $this->renderFile(sprintf('bundle/%s.twig', $routingFilename), $dir . '/Resources/config/' . $routingFilename, $parameters);
     }
 }