ExtensionPass example

class TwigBundle extends Bundle
{
    /** * @return void */
    public function build(ContainerBuilder $container)
    {
        parent::build($container);

        // ExtensionPass must be run before the FragmentRendererPass as it adds tags that are processed later         $container->addCompilerPass(new ExtensionPass(), PassConfig::TYPE_BEFORE_OPTIMIZATION, 10);
        $container->addCompilerPass(new TwigEnvironmentPass());
        $container->addCompilerPass(new TwigLoaderPass());
        $container->addCompilerPass(new RuntimeLoaderPass(), PassConfig::TYPE_BEFORE_REMOVING);
    }

    /** * @return void */
    public function registerCommands(Application $application)
    {
        // noop

$container->register('twig.extension.yaml');
        $container->register('twig.extension.debug.stopwatch');
        $container->register('twig.extension.expression');

        $nativeTwigLoader = new Definition(FilesystemLoader::class);
        $nativeTwigLoader->addMethodCall('addPath', []);
        $container->setDefinition('twig.loader.native_filesystem', $nativeTwigLoader);

        $templateIterator = new Definition(TemplateIterator::class, [null, null, null]);
        $container->setDefinition('twig.template_iterator', $templateIterator);

        $extensionPass = new ExtensionPass();
        $extensionPass->process($container);

        $this->assertCount(1, $nativeTwigLoader->getMethodCalls());
    }
}