Flags in bash

flags.bash

#!/bin/bash

flag_with_value='';
flag_without_value='';

while [[ "$#" -gt 0 ]];
do
	arg="$1";
	val="$2";
	case "$arg" in
		-w|--flag-with-value)
			flag_with_value="$val";
			shift; # shift the value off of args
			;;
		-o|--flag-without-value)
			flag_without_value='true';
			;;
	esac
	shift; # shift the flag off of args
done