bluecadet_gcse.module

<?php

/**
 * Implements hook_theme().
 */
function bluecadet_gcse_theme($existing, $type, $theme, $path) {
  return array(
    'gcse_page' => array(
      'variables' => [],
    ),
  );
}

/**
 * Implements hook_metatags_attachments_alter().
 */
function bluecadet_gcse_metatags_attachments_alter(array &$metatag_attachments) {
  if (\Drupal::routeMatch()->getRouteName() == 'gcse.search') {
    $metatag_attachments['#attached']['html_head'][] = [
      [
        '#tag' => 'meta',
        '#attributes' => [
          'name' => 'robots',
          'content' => 'noindex,nofollow',
        ],
      ],
      'robots',
    ];
  }
}