bashでコマンドオプションを解析する(getopts)

getopts.sh

#!/bin/bash
set -eu

help_exit() {
    echo "Usage:" `basename $0` "[-f] [-b dir] [arg ...]" 1>&2
    exit ${1:-0}
}

FOO=
BAR=

while getopts fb:h OPT
do
    case $OPT in
        f)  FOO=1
            ;;
        b)  BAR=$OPTARG
            ;;
        h)  help_exit
            ;;
        \?) help_exit 1
            ;;
    esac
done
shift $((OPTIND - 1))

echo "FOO:$FOO"
echo "BAR:$BAR"
echo "ARGS:""$@"