UpdateReady::submitForm

public UpdateReady::submitForm(array &$form, FormStateInterface $form_state)

public function submitForm(array &$form, FormStateInterface $form_state) {
  // Store maintenance_mode setting so we can restore it when done.
  $_SESSION['maintenance_mode'] = $this->state->get('system.maintenance_mode');
  if ($form_state->getValue('maintenance_mode') == TRUE) {
    $this->state->set('system.maintenance_mode', TRUE);
  }

  if (!empty($_SESSION['update_manager_update_projects'])) {
    // Make sure the Updater registry is loaded.
    drupal_get_updaters();

    $updates = array();
    $directory = _update_manager_extract_directory();

    $projects = $_SESSION['update_manager_update_projects'];
    unset($_SESSION['update_manager_update_projects']);

    $project_real_location = NULL;
    foreach ($projects as $project => $url) {
      $project_location = $directory . '/' . $project;
      $updater = Updater::factory($project_location, $this->root);
      $project_real_location = drupal_realpath($project_location);
      $updates[] = array(
        'project' => $project,
        'updater_name' => get_class($updater),
        'local_url' => $project_real_location,
      );
    }

    // If the owner of the last directory we extracted is the same as the
    // owner of our configuration directory (e.g. sites/default) where we're
    // trying to install the code, there's no need to prompt for FTP/SSH
    // credentials. Instead, we instantiate a Drupal\Core\FileTransfer\Local
    // and invoke update_authorize_run_update() directly.
    if (fileowner($project_real_location) == fileowner($this->sitePath)) {
      $this->moduleHandler->loadInclude('update', 'inc', 'update.authorize');
      $filetransfer = new Local($this->root);
      $response = update_authorize_run_update($filetransfer, $updates);
      if ($response instanceof Response) {
        $form_state->setResponse($response);
      }
    }
    // Otherwise, go through the regular workflow to prompt for FTP/SSH
    // credentials and invoke update_authorize_run_update() indirectly with
    // whatever FileTransfer object authorize.php creates for us.
    else {
      // The page title must be passed here to ensure it is initially used
      // when authorize.php loads for the first time with the FTP/SSH
      // credentials form.
      system_authorized_init('update_authorize_run_update', __DIR__ . '/../../update.authorize.inc', array($updates), $this->t('Update manager'));
      $form_state->setRedirectUrl(system_authorized_get_url());
    }
  }
}