parse_arguments.sh

usage() {
  cat 1>&2 <<EOF
Usage $(basename $0) [POSITIONAL_ARGUMENT] [OPTIONS]
Describe here what the script does.
  -v|--verbose      Make the Script verbose.
  -h|--help         Print this help message.
  -l X|--logfile X  Set the output Logfile to X
EOF
}

parse_arguments(){
  PARAMS=""
  while (( "$#" )); do
    case "$1" in
      -v|--verbose)
        VERBOSE_OUTPUT=true
        shift 1
        ;;
      -h|--help)
        usage
        exit 0
      ;;
      -l|--logfile)
        LOG_TO_FILE=true
        LOGFILE=$2
        shift 2
      ;;
      --) # end Argument parsing
        shift
        break
        ;;
      -*|--*=) # unsupported Argument
        echo "Error: Unsupported Argument '$1'" >&2
        usage
        exit 1
      ;;
      *) # preserve positional Arguments
        PARG="$PARAMS$1"
        shift
      ;;
    esac
  done
}