# https://gist.github.com/ablacklama/550420c597f9599cf804d57dd6aad131

swatch_usage() {
    cat <<EOF >&2
NAME
       swatch - execute a program periodically with "watch". Supports aliases.

SYNOPSIS
       swatch [options] command

OPTIONS
       -n, --interval seconds (default: 1)
              Specify update interval.  The command will not allow quicker than 
              0.1 second interval.
EOF
}

if [ $# -eq 0 ]; then
    swatch_usage
    return 1
fi
seconds=1

case "$1" in
-n)
    seconds="$2"
    args=${*:3}
    ;;
-h)
    swatch_usage
    return 1
    ;;
*)
    seconds=1
    args=${*:1}
    ;;

esac

watch --color -n "$seconds" --exec bash -ic "$args || true"