#!/bin/bash

# A custom handler for optional args
# Largely reproduces optags1.sh, but does more

usage() {
    echo "usage optargs2.sh [-s | --save] [-r | --restore [filename]] [--file | -f filename] [--drop | -d dropname] [-t | --triple single double] [--help | -h]"
    exit 2
}

while [[ -n "$1" ]]   # quit if there are no more command line params
do
    case "$1" in
      -h|--help)  
            usage  
            ;;
      -s|--save)
            echo "Save"
            shift
            ;;
      -r|--restore) 
            regexInt='^[0-9]+$'
            if [[ $2 =~ $regexInt ]]; then
                echo "restore $2"; shift 2
            else
                echo "restore"
                shift
                fi
            ;;
      -d|--drop)
          echo "drop $2"
          shift 2
          ;;  
      -f|--file)
          echo "file $2"
          shift 2
          ;;  
      -t|--triple)
          echo "triple $2 $3"
          shift 3
          ;;
      *)
          # On any unknown arg exit the while loop so those args 
          # can be processed elsewhere
          break
          ;;  
    esac
done 
echo "AAA $*"