TwigExtensionPass::process

public TwigExtensionPass::process(ContainerBuilder $container)

public function process(ContainerBuilder $container) {
  $twig_extension_hash = '';
  foreach (array_keys($container->findTaggedServiceIds('twig.extension')) as $service_id) {
    $class_name = $container->getDefinition($service_id)->getClass();
    $reflection = new \ReflectionClass($class_name);
    // We use the class names as hash in order to invalidate on new extensions
    // and mtime for every time we change an existing file.
    $twig_extension_hash .= $class_name . filemtime($reflection->getFileName());
  }

  $container->setParameter('twig_extension_hash', hash('crc32b', $twig_extension_hash));
}