#!/bin/sh

set -u # Throw errors when unset variables are used
set -e # Exit on error
#set -o pipefail # Bash specific

usage() {
	echo "Tool to BLAH BLAH BLAH"
	echo
	echo "Usage:"
	echo "$0 [-eh] [-a <arg>] <blabla>"
	echo
	echo "-a <arg>  Option with argument"
	echo "-e        Example option"
	echo "-h        This help message"
	exit
}

askyn() {
	while true; do
		printf '%s ' "$1 "
		read -r yn
		case $yn in
			[Yy]* ) return 0;;
			[Nn]* ) return 1;;
			* ) echo "Please answer [y]es or [n]o.";;
		esac
	done
}

# A POSIX variable
OPTIND=1 # Reset in case getopts has been used previously in the shell.

# Initialize our own variables:
ARGUMENT=""
EXAMPLE=""

# getopts only allows single letter options (but is apparently the most
# portable). If you want multi letter options (eg --help) use getopt.
while getopts "hea:" opt; do
	case "$opt" in
	a)	ARGUMENT="$OPTARG";;
	h)
		usage
		;;
	e)	EXAMPLE="-e" ;;
	?)	exit 1 ;; # message provided by getopts
	esac
done

shift $((OPTIND-1))

[ $# -ge 1 ] && [ "$1" = "--" ] && shift

MYDIR=$(dirname "$(realpath "$0")")
TESTDIR="${MYDIR}/test"

mkdir -p "${TESTDIR}"
rm "${TESTDIR}/*"
touch "${TESTDIR}/aaa"
touch "${TESTDIR}/bbb"
touch "${TESTDIR}/ccc"
touch "${TESTDIR}/ëëë"