Re: Handling short and long options

[Dennis Williamson]

On Mon, Sep 6, 2021, 5:40 PM angioberlinguer via <help-bash@gnu.org> wrote:

> I have made the following function to parse short and long options.
> Perhaps I do not need to
> call `set -- $*`.
>
> The while loop could also be changed. I want to allow splitting on space
> and equal sign
> so I can call it with `-s val` and `--src=val`.
>
> rando ()
> {
>
> local incl=() fls=()
> IFSPREV="$IFS" # Save IFS (splits arguments on whitespace by default)
> IFS=" =" # Split arguments on " " and "="
> set -- $* # Set positional parameters to command line arguments
> IFS="$IFSPREV" # Set original IFS
>
> local iarg=0 narg="$#"
> while (( narg > 0 )); do
> opt="$1"
> iarg=$(( iarg + 1 ))
> case $opt in
> ("--incl") incl+=("$2") ; shift 2 ;;
> ("-s"|"--src"|"--source") src=$( "$2" ) ; shift 2 ;;
> ("-d"|"--dst"|"--destin") dst="$2" ; shift 2 ;;
> ("--") shift 1 ; break ;;
> ("-"*) printf '%s\n' "Unknown option: $1" ; shift 1 ;;
> (*) fls+=( "$2" ) ; shift 1 ;;
> esac
> done


WTH is going on?