How to parse Args in Bash Exc

Bash Arg Parsing

help() {
  cat 1>&2 <<-USAGE
usage: $exe [options] [BRANCH]
  USAGE GOES HERE 

  -h --help       Show this message
  -v --verbose    Show URL before opening
  -b --background Open page in the background
USAGE
}

for arg in "$@"; do
  case $arg
  in
    -v | --verbose)
      verbose=true
      ;;
    -h | --help)
      usage
      exit
      ;;
    -*)
      echo "$0: unrecognized parameter '$arg'"
      usage
      exit 1
      ;;
    *)
      branch=$arg
      ;;
  esac
done

usage() {
  help
  exit 1
}

die() {
  echo 1>&2 "$1"
  exit 1
}