upei_roblib_search/modules/roblib_search_eds/roblib_search_eds.module

<?php

/**
 * @file
 * Implementation of Roblib search for searching EDSAPI (EBSCO) targets.
 */

/**
 * Implements hook_theme().
 */
function roblib_search_eds_theme($existing, $type, $theme, $path) {
  $modulePath = \Drupal::service('module_handler')->getModule('roblib_search')
    ->getPath();
  $spinner_path = '/' . $modulePath . "/img/spinner.gif";
  return [
    'roblib_search_eds_books' => [
      'variables' => ['query' => NULL, 'spinner_path' => $spinner_path],
    ],
    'roblib_search_eds_articles' => [
      'variables' => ['query' => NULL, 'spinner_path' => $spinner_path],
    ],
  ];
}

/**
 * Implements hook_help().
 *
 * @param type $path
 * @param type $arg
 * @return type
 */
function roblib_search_eds_help($path, $arg) {
  switch ($path) {
    case 'admin/help#roblib_search_eds':
      return t(
        '<p>
   provides a EDSAPI target for the Roblib search module.  This target uses javascript
   to render the results.
   </p>'
      );
  }
}