gistfile1.php

<?php

/**
 * Implements hook_requirements().
 */
function git_config_requirements($phase) {
  $requirements = array();
  $requirements['git-wrapper'] = array(
    'title' => t('Git Wrapper'),
    'value' => t('!wrapper is required to use the git_config module.', array('!wrapper' => l('Git Wrapper', 'https://github.com/cpliakas/git-wrapper'))),
  );
  if (!class_exists('GitWrapper\GitWrapper')) {
    $requirements['git-wrapper']['description'] = t('You must install the GitWrapper PHP component to make use of the git_config module.');
    $requirements['git-wrapper']['severity'] =  REQUIREMENT_ERROR;
  }
  return $requirements;
}