Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\DependencyInjection\Compiler;
Chris@0: 
Chris@0: use Symfony\Component\DependencyInjection\Alias;
Chris@0: use Symfony\Component\DependencyInjection\ContainerBuilder;
Chris@0: use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
Chris@0: 
Chris@0: /**
Chris@0:  * Sets a service to be an alias of another one, given a format pattern.
Chris@0:  */
Chris@0: class AutoAliasServicePass implements CompilerPassInterface
Chris@0: {
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function process(ContainerBuilder $container)
Chris@0:     {
Chris@0:         foreach ($container->findTaggedServiceIds('auto_alias') as $serviceId => $tags) {
Chris@0:             foreach ($tags as $tag) {
Chris@0:                 if (!isset($tag['format'])) {
Chris@0:                     throw new InvalidArgumentException(sprintf('Missing tag information "format" on auto_alias service "%s".', $serviceId));
Chris@0:                 }
Chris@0: 
Chris@0:                 $aliasId = $container->getParameterBag()->resolveValue($tag['format']);
Chris@0:                 if ($container->hasDefinition($aliasId) || $container->hasAlias($aliasId)) {
Chris@14:                     $container->setAlias($serviceId, new Alias($aliasId, true));
Chris@0:                 }
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: }