def get_script_path(script_file_name):
    """Return the full path of a given filename under the script dir
    """
    script_path = get_data_file('lua', '%s' % (script_file_name, ))
    if not os.path.exists(script_path):
        script_path = None
    return script_path
def get_reference_files_path(reference_file_name):
    """Return the full path of a given filename under the reference_files dir
    """
    refs_path = get_data_file('reference_files',
                              '%s' % (reference_file_name, ))
    if not os.path.exists(refs_path):
        refs_path = ""
    return refs_path
def get_media_path(media_file_name):
    """Return the full path of a given filename under the media dir
       (doesn't start with file:///)
    """

    media_path = get_data_file('media', '%s' % (media_file_name, ))
    if not os.path.exists(media_path):
        media_path = None
    return media_path