RemovePrivateAliasesPass.php

<?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\DependencyInjection\Compiler;

use Symfony\Component\DependencyInjection\ContainerBuilder;

/**
 * Remove private aliases from the container. They were only used to establish
 * dependencies between services, and these dependencies have been resolved in
 * one of the previous passes.
 *
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 */
class RemovePrivateAliasesPass implements CompilerPassInterface {

  /**
   * Removes private aliases from the ContainerBuilder
   *
   * @param ContainerBuilder $container
   */
  public function process(ContainerBuilder $container) {
    $compiler = $container
      ->getCompiler();
    $formatter = $compiler
      ->getLoggingFormatter();
    foreach ($container
      ->getAliases() as $id => $alias) {
      if ($alias
        ->isPublic()) {
        continue;
      }
      $container
        ->removeAlias($id);
      $compiler
        ->addLogMessage($formatter
        ->formatRemoveService($this, $id, 'private alias'));
    }
  }

}