Is there a tool or macro processor capable of compactly expressing BASH CLI interfaces?

I am writing scripts with the following boilerplate CLI pattern:

usage(){
  echo "$0 yada yada"
  ...
  echo 
}
for arg in "$@"; do
  case "$arg" in
    '--help|-help') set -- "$@" '-h';;
    ...
  esac
done

OPTIND=1
while getopts 'h...' opt; do
  case "$opt" in
     'h') usage; exit 0;;
      ...
  esac
done
shift $((OPTIND-1))

Is there any way to compress or encapsulate this in BASH on linux with other tools, perhaps an additional dependency?