class ProxyServicesPass

class ProxyServicesPass implements CompilerPassInterface {

  /**
   * {@inheritdoc}
   *
   * phpcs:ignore Drupal.Commenting.FunctionComment.VoidReturn
   * @return void
   */
  public function process(ContainerBuilder $container) {
    foreach ($container
      ->getDefinitions() as $service_id => $definition) {
      if ($definition
        ->isLazy()) {
        $proxy_class = ProxyBuilder::buildProxyClassName($definition
          ->getClass());
        if (class_exists($proxy_class)) {

          // Copy the existing definition to a new entry.
          $definition
            ->setLazy(FALSE);

          // Ensure that the service is accessible.
          $definition
            ->setPublic(TRUE);
          $new_service_id = 'drupal.proxy_original_service.' . $service_id;
          $container
            ->setDefinition($new_service_id, $definition);
          $container
            ->register($service_id, $proxy_class)
            ->setArguments([
            new Reference('service_container'),
            $new_service_id,
          ]);
        }
        else {
          $class_name = $definition
            ->getClass();

          // Find the root namespace.
          $match = [];
          preg_match('/([a-zA-Z0-9_]+\\\\[a-zA-Z0-9_]+)\\\\(.+)/', $class_name, $match);
          $root_namespace = $match[1];

          // Find the root namespace path.
          $root_namespace_dir = '[namespace_root_path]';
          $namespaces = $container
            ->getParameter('container.namespaces');

          // Hardcode Drupal Core, because it is not registered.
          $namespaces['Drupal\\Core'] = 'core/lib/Drupal/Core';
          if (isset($namespaces[$root_namespace])) {
            $root_namespace_dir = $namespaces[$root_namespace];
          }
          $message = <<<EOF

Missing proxy class '{<span class="php-variable">$proxy_class</span>}' for lazy service '{<span class="php-variable">$service_id</span>}'.
Use the following command to generate the proxy class:
  php core/scripts/generate-proxy-class.php '{<span class="php-variable">$class_name</span>}' "{<span class="php-variable">$root_namespace_dir</span>}"


EOF;
          trigger_error($message, E_USER_WARNING);
        }
      }
    }
  }

}