_update_requirement_check

_update_requirement_check($project, $type)

function _update_requirement_check($project, $type) {
  $requirement = array();
  if ($type == 'core') {
    $requirement['title'] = t('Drupal core update status');
  }
  else {
    $requirement['title'] = t('Module and theme update status');
  }
  $status = $project['status'];
  if ($status != UPDATE_CURRENT) {
    $requirement['reason'] = $status;
    $requirement['severity'] = REQUIREMENT_ERROR;
    // Append the available updates link to the message from
    // _update_message_text(), and format the two translated strings together in
    // a single paragraph.
    $requirement['description'][] = ['#markup' => _update_message_text($type, $status)];
    if (_update_manager_access()) {
      $requirement['description'][] = ['#prefix' => ' ', '#markup' => t('See the <a href=":available_updates">available updates</a> page for more information and to install your missing updates.', [':available_updates' => \Drupal::url('update.report_update')])];
    }
    else {
      $requirement['description'][] = ['#prefix' => ' ', '#markup' => t('See the <a href=":available_updates">available updates</a> page for more information.', [':available_updates' => \Drupal::url('update.status')])];
    }
  }
  switch ($status) {
    case UPDATE_NOT_SECURE:
      $requirement_label = t('Not secure!');
      break;
    case UPDATE_REVOKED:
      $requirement_label = t('Revoked!');
      break;
    case UPDATE_NOT_SUPPORTED:
      $requirement_label = t('Unsupported release');
      break;
    case UPDATE_NOT_CURRENT:
      $requirement_label = t('Out of date');
      $requirement['severity'] = REQUIREMENT_WARNING;
      break;
    case UPDATE_UNKNOWN:
    case UPDATE_NOT_CHECKED:
    case UPDATE_NOT_FETCHED:
      $requirement_label = isset($project['reason']) ? $project['reason'] : t('Can not determine status');
      $requirement['severity'] = REQUIREMENT_WARNING;
      break;
    default:
      $requirement_label = t('Up to date');
  }
  if ($status != UPDATE_CURRENT && $type == 'core' && isset($project['recommended'])) {
    $requirement_label .= ' ' . t('(version @version available)', array('@version' => $project['recommended']));
  }
  $requirement['value'] = \Drupal::l($requirement_label, new Url(_update_manager_access() ? 'update.report_update' : 'update.status'));
  return $requirement;
}