function file_cron

Implements hook_cron().

File

core/modules/file/file.module, line 450

Code

function file_cron() {
  $age = \Drupal::config('system.file')->get('temporary_maximum_age');
  $file_storage = \Drupal::entityTypeManager()->getStorage('file');
  /** @var \Drupal\Core\StreamWrapper\StreamWrapperManagerInterface $stream_wrapper_manager */
  $stream_wrapper_manager = \Drupal::service('stream_wrapper_manager');
  // 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')->accessCheck(FALSE)
      ->condition('status', FileInterface::STATUS_PERMANENT, '<>')
      ->condition('changed', \Drupal::time()->getRequestTime() - $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())) {
          if (!$stream_wrapper_manager->isValidUri($file->getFileUri())) {
            \Drupal::logger('file system')->warning('Temporary file "%path" that was deleted during garbage collection did not exist on the filesystem. This could be caused by a missing stream wrapper.', [
              '%path' => $file->getFileUri(),
            ]);
          }
          else {
            \Drupal::logger('file system')->warning('Temporary file "%path" that was deleted during garbage collection did not exist on the filesystem.', [
              '%path' => $file->getFileUri(),
            ]);
          }
        }
        // Delete the file entity. If the file does not exist, this will
        // generate a second notice in the watchdog.
        $file->delete();
      }
      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.', [
          '%path' => $file->getFileUri(),
          '%modules' => implode(', ', array_keys($references)),
        ]);
      }
    }
  }
}