ConfigImportSubscriber::validateDependencies

protected ConfigImportSubscriber::validateDependencies(ConfigImporter $config_importer)

protected function validateDependencies(ConfigImporter $config_importer) {
  $core_extension = $config_importer->getStorageComparer()->getSourceStorage()->read('core.extension');
  $existing_dependencies = [
    'config' => $config_importer->getStorageComparer()->getSourceStorage()->listAll(),
    'module' => array_keys($core_extension['module']),
    'theme' => array_keys($core_extension['theme']),
  ];

  $theme_data = $this->getThemeData();
  $module_data = $this->getModuleData();

  // Validate the dependencies of all the configuration. We have to validate
  // the entire tree because existing configuration might depend on
  // configuration that is being deleted.
  foreach ($config_importer->getStorageComparer()->getSourceStorage()->listAll() as $name) {
    // Ensure that the config owner is installed. This checks all
    // configuration including configuration entities.
    list($owner, ) = explode('.', $name, 2);
    if ($owner !== 'core') {
      $message = FALSE;
      if (!isset($core_extension['module'][$owner]) && isset($module_data[$owner])) {
        $message = $this->t('Configuration %name depends on the %owner module that will not be installed after import.', array(
          '%name' => $name,
          '%owner' => $module_data[$owner]->info['name']
        ));
      }
      elseif (!isset($core_extension['theme'][$owner]) && isset($theme_data[$owner])) {
        $message = $this->t('Configuration %name depends on the %owner theme that will not be installed after import.', array(
          '%name' => $name,
          '%owner' => $theme_data[$owner]->info['name']
        ));
      }
      elseif (!isset($core_extension['module'][$owner]) && !isset($core_extension['theme'][$owner])) {
        $message = $this->t('Configuration %name depends on the %owner extension that will not be installed after import.', array(
          '%name' => $name,
          '%owner' => $owner
        ));
      }

      if ($message) {
        $config_importer->logError($message);
        continue;
      }
    }

    $data = $config_importer->getStorageComparer()->getSourceStorage()->read($name);
    // Configuration entities have dependencies on modules, themes, and other
    // configuration entities that we can validate. Their content dependencies
    // are not validated since we assume that they are soft dependencies.
    // Configuration entities can be identified by having 'dependencies' and
    // 'uuid' keys.
    if (isset($data['dependencies']) && isset($data['uuid'])) {
      $dependencies_to_check = array_intersect_key($data['dependencies'], array_flip(['module', 'theme', 'config']));
      foreach ($dependencies_to_check as $type => $dependencies) {
        $diffs = array_diff($dependencies, $existing_dependencies[$type]);
        if (!empty($diffs)) {
          $message = FALSE;
          switch ($type) {
            case 'module':
              $message = $this->formatPlural(
              count($diffs), 
              'Configuration %name depends on the %module module that will not be installed after import.', 
              'Configuration %name depends on modules (%module) that will not be installed after import.', 
              array('%name' => $name, '%module' => implode(', ', $this->getNames($diffs, $module_data)))
              );
              break;
            case 'theme':
              $message = $this->formatPlural(
              count($diffs), 
              'Configuration %name depends on the %theme theme that will not be installed after import.', 
              'Configuration %name depends on themes (%theme) that will not be installed after import.', 
              array('%name' => $name, '%theme' => implode(', ', $this->getNames($diffs, $theme_data)))
              );
              break;
            case 'config':
              $message = $this->formatPlural(
              count($diffs), 
              'Configuration %name depends on the %config configuration that will not exist after import.', 
              'Configuration %name depends on configuration (%config) that will not exist after import.', 
              array('%name' => $name, '%config' => implode(', ', $diffs))
              );
              break;
          }

          if ($message) {
            $config_importer->logError($message);
          }
        }
      }
    }
  }
}