docs: def make_tarball(src_dir):
      """
      Make gzipped tarball from a source directory
  
      :param src_dir: source directory
      :raises TypeError: if src_dir is not str
      """
      if type(src_dir) != str:
          raise TypeError('src_dir must be str')
      output_file = src_dir + ".tar.gz"
      log.msg("Wrapping tarball '{out}' ...".format(out=output_file))
      if not _dry_run:
          with tarfile.open(output_file, "w:gz") as tar:
              tar.add(src_dir, arcname=os.path.basename(src_dir))
      return output_file