Method scanForFlag

src/main/java/org/sfj/DumbCLIParse.java:128–149

Scan for the first argument with a param name that matches the argname. Scanning for arg "foo" looks for any of "--foo", "--not--foo", "--not-foo", "-foo", "-not--foo", "-not-foo". @param remaining list of remaining args to scan through @param argname argname to scan for, case sensitive @param foun

(List<String> remaining, String argname, boolean foundVal)

   * or if the flag is not seen, !foundVal will be returned.
   */
  public static boolean scanForFlag(List<String> remaining, String argname, boolean foundVal) {
    // match --not--arg, or single dash versions
    // case sensitive.
    Pattern pattern = Pattern.compile(flagPattern(argname));
    Optional<Matcher> got = new ArrayList<>(remaining).stream().map((s) -> {
      Matcher ret = match(pattern, s);
      if (ret != null) {
        remaining.remove(s);
      }
      return ret;
    }).filter(Objects::nonNull).limit(1).reduce((first, second) -> second);

    if (got.isPresent()) {
      String not = got.get().group(2);
      if (not == null) {
        return foundVal;
      } else {
        return !foundVal;
      }
    }
    return !foundVal;
  }

  static class FlagArg {
    private final String arg;