textile.module

<?php

/**
 * @file
 * The textile module allows input of Textile shorthand.
 */

/**
 * Implements hook_libraries_info().
 */
function textile_libraries_info() {
  $libraries['textile'] = array(
    'name' => 'textile',
    'vendor url' => 'https://github.com/zdia/textile',
    'download url' => 'https://github.com/zdia/textile/archive/master.zip',
    'version arguments' => array(
      'file' => 'classTextile.php',
      'pattern' => '@(?i:protected \$ver \= \')([0-9\.]+)@',
      'lines' => 500,
    ),
    'files' => array(
      'php' => array(
        'classTextile.php',
      ),
    ),
  );

  return $libraries;
}

 function _textile_match_process($matches) {
  static $textile = NULL;

  if (is_null($textile)) {
    if (!empty($matches)) {
      libraries_load('textile');
    }

    $textile = new Textile();
    // $textile->hu is the string that preceeds all relative URLs.
    $url = Drupal::url('<front>');

    $textile->hu = (substr($url, -1) == '/' ? $url : "$url/");
  }

  return is_null($textile) ? $matches[1] : $textile->TextileThis($matches[1]);
}