*
   * @since 11.0
   */
  public static String simplifyPath(String pathname) {
    checkNotNull(pathname);
    if (pathname.length() == 0) {
      return ".";
    }

    // split the path apart
    Iterable<String> components = Splitter.on('/').omitEmptyStrings().split(pathname);
    List<String> path = new ArrayList<>();

    // resolve ., .., and //

        () => '[^/]'
    ],

    // leading slash
    [

        // > A leading slash matches the beginning of the pathname.
        // > For example, "/*.c" matches "cat-file.c" but not "mozilla-sha1/sha1.c".
        // A leading slash matches the beginning of the pathname
        /^\//,
        () => '^'
    ],

    // replace special metacharacter slash after the leading slash
    [
        /\//g,