--- /dev/null
+<?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\Component\Translation\DependencyInjection;
+
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * Adds tagged translation.extractor services to translation extractor.
+ */
+class TranslationExtractorPass implements CompilerPassInterface
+{
+ private $extractorServiceId;
+ private $extractorTag;
+
+ public function __construct($extractorServiceId = 'translation.extractor', $extractorTag = 'translation.extractor')
+ {
+ $this->extractorServiceId = $extractorServiceId;
+ $this->extractorTag = $extractorTag;
+ }
+
+ public function process(ContainerBuilder $container)
+ {
+ if (!$container->hasDefinition($this->extractorServiceId)) {
+ return;
+ }
+
+ $definition = $container->getDefinition($this->extractorServiceId);
+
+ foreach ($container->findTaggedServiceIds($this->extractorTag, true) as $id => $attributes) {
+ if (!isset($attributes[0]['alias'])) {
+ throw new RuntimeException(sprintf('The alias for the tag "translation.extractor" of service "%s" must be set.', $id));
+ }
+
+ $definition->addMethodCall('addExtractor', array($attributes[0]['alias'], new Reference($id)));
+ }
+ }
+}