lib hook

function akselslider_libraries_info() {
  return array(
      'swiper' => array(
          'name' => 'swiper',
          'library path' => drupal_get_path('module', 'akselslider'),
         // 'version callback' => , // Set a callback here to get the version in use.
          'version arguments' => array(),
          'variants' => array(),
          'cdn' => array(
          'aliases' => array('swiper',),
          'limit' => 3,
          'options' => array(
              'weight' => -2,
              'group' => 'swiper',
          ),
          'download' => array(
              'versions' => array('3.3.1'),
              'plugins' => array(
                  'cdnjs' => array('latest'),
                  '*' => array('latest')
              )
          ),
          'request' => array(
              'timeout' => 5,
          ),
      )
    )
  );
}

function swiper_libraries_info() {
  $swiper_url = SWIPER_CDN . '3.3.1';

  $libraries['swiper'] = array(
    'name' => 'Swiper library',
    'vendor url' => 'http://idangero.us/swiper/',
    'download url' => 'http://idangero.us/swiper/',
    'library path' => $swiper_url,
    'version' => '3.3.1',
    /*'version arguments' => array(
      'file' => 'readme.txt',
      // Best practice: Document the actual version strings for later reference.
      // 1.x: Version 1.0
      'pattern' => '/Version (\d+)/',
      'lines' => 5,
    ),*/
    'files' => array(
      // 'js' and 'css' follow the syntax of hook_library(), but file paths are
      // relative to the library path.
      'js' => array(
        $swiper_url . SWIPER_JS_MIN => array(
          'type' => 'external',
          'group' => JS_LIBRARY,
        ),
      ),
      'css' => array(
        $swiper_url . SWIPER_CSS_MIN,
      ),
    ),

    'variants' => array(
      // All properties defined for 'minified' override top-level properties.
      'minified' => array(
        'files' => array(
          'js' => array(
            $swiper_url . SWIPER_JS_MIN => array(
              'type' => 'external',
              'group' => JS_LIBRARY,
          ),
          ),
          'css' => array(
            $swiper_url . SWIPER_CSS_MIN,
          ),
        ),
      ),
      'source' => array(
        'files'=> array(
          'js' => array(
            $swiper_url . SWIPER_JS => array(
              'type' => 'external',
              'group' => JS_LIBRARY,
            ),
          ),
          'css' => array(
            $swiper_url . SWIPER_CSS,
          ),
        ),
      ),


    ),

  );

  return $libraries;
}