protected function MigrationPluginManager::getDiscovery in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/migrate/src/Plugin/MigrationPluginManager.php \Drupal\migrate\Plugin\MigrationPluginManager::getDiscovery()

Gets the plugin discovery.

This method overrides DefaultPluginManager::getDiscovery() in order to search for migration configurations in the MODULENAME/migrations and MODULENAME/migration_templates directories. Throws a deprecation notice if the MODULENAME/migration_templates directory exists.

Overrides DefaultPluginManager::getDiscovery

File

core/modules/migrate/src/Plugin/MigrationPluginManager.php, line 70

Class

MigrationPluginManager

Plugin manager for migration plugins.

Namespace

Drupal\migrate\Plugin

Code

protected function getDiscovery() {
  if (!isset($this->discovery)) {
    $directories = array_map(function ($directory) {

      // Check for use of the @deprecated /migration_templates directory.
      // @todo Remove use of /migration_templates in Drupal 9.0.0.
      if (is_dir($directory . '/migration_templates')) {
        @trigger_error('Use of the /migration_templates directory to store migration configuration files is deprecated in Drupal 8.1.0 and will be removed before Drupal 9.0.0. See https://www.drupal.org/node/2920988.', E_USER_DEPRECATED);
      }

      // But still accept configurations found in /migration_templates.
      return [
        $directory . '/migration_templates',
        $directory . '/migrations',
      ];
    }, $this->moduleHandler
      ->getModuleDirectories());
    $yaml_discovery = new YamlDirectoryDiscovery($directories, 'migrate');

    // This gets rid of migrations which try to use a non-existent source
    // plugin. The common case for this is if the source plugin has, or
    // specifies, a non-existent provider.
    $only_with_source_discovery = new NoSourcePluginDecorator($yaml_discovery);

    // This gets rid of migrations with explicit providers set if one of the
    // providers do not exist before we try to use a potentially non-existing
    // deriver. This is a rare case.
    $filtered_discovery = new ProviderFilterDecorator($only_with_source_discovery, [
      $this->moduleHandler,
      'moduleExists',
    ]);
    $this->discovery = new ContainerDerivativeDiscoveryDecorator($filtered_discovery);
  }
  return $this->discovery;
}