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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\HttpKernel\DependencyInjection;
  13  
  14  use Psr\Log\LoggerInterface;
  15  use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
  16  use Symfony\Component\DependencyInjection\ContainerBuilder;
  17  use Symfony\Component\HttpKernel\Log\Logger;
  18  
  19  /**
  20   * Registers the default logger if necessary.
  21   *
  22   * @author Kévin Dunglas <dunglas@gmail.com>
  23   */
  24  class LoggerPass implements CompilerPassInterface
  25  {
  26      /**
  27       * {@inheritdoc}
  28       */
  29      public function process(ContainerBuilder $container)
  30      {
  31          $container->setAlias(LoggerInterface::class, 'logger')
  32              ->setPublic(false);
  33  
  34          if ($container->has('logger')) {
  35              return;
  36          }
  37  
  38          $container->register('logger', Logger::class)
  39              ->setPublic(false);
  40      }
  41  }