file_cron

file_cron()

function file_cron() {
  $age = \Drupal::config('system.file')->get('temporary_maximum_age');
  $file_storage = \Drupal::entityManager()->getStorage('file');

  // Only delete temporary files if older than $age. Note that automatic cleanup
  // is disabled if $age set to 0.
  if ($age) {
    $fids = Drupal::entityQuery('file')
      ->condition('status', FILE_STATUS_PERMANENT, '<>')
      ->condition('changed', REQUEST_TIME - $age, '<')
      ->range(0, 100)
      ->execute();
    $files = $file_storage->loadMultiple($fids);
    foreach ($files as $file) {
      $references = \Drupal::service('file.usage')->listUsage($file);
      if (empty($references)) {
        if (file_exists($file->getFileUri())) {
          $file->delete();
        }
        else {
          \Drupal::logger('file system')->error('Could not delete temporary file "%path" during garbage collection', array('%path' => $file->getFileUri()));
        }
      }
      else {
        \Drupal::logger('file system')->info('Did not delete temporary file "%path" during garbage collection because it is in use by the following modules: %modules.', array('%path' => $file->getFileUri(), '%modules' => implode(', ', array_keys($references))));
      }
    }
  }
}