#!/bin/bash

usage='gitFiles [-h] [dir ...]
Run git ls-tree and generate list of files under git using the current working
or specified directories.

Options:
  -h or -help - print this message'

while [[ $1 == -* ]] ; do
    opt=$1
    shift
    case "$opt" in 
        -h) echo "$usage" > /dev/stderr
            exit 1 ;;
        *)  echo "Error: invalid option: $opt" > /dev/stderr
            echo "$usage" > /dev/stderr
            exit 1 ;;
    esac
done

git ls-tree -r --name-only HEAD "$@"