get_opts

opts

The code is looping though the ":ls" options, and setting the value of the "TAG_TYPE" variable according to the option given.

Shortcut: get_opts

while getopts ":ls" options; do
  case ${options} in
  l)
    TAG_TYPE="long"
    ;;
  s)
    TAG_TYPE="short"
    ;;
  :)
    echo "ERROR: Invalid option: ${OPTARG} requires an argument" 1>&2
    exit 1
    ;;
  \?)
    echo "ERROR: Invalid option: ${OPTARG}" 1>&2
    exit 1
    ;;
  esac
done
shift $((OPTIND - 1))