A small countdown timer in bash

countdown.sh

#!/bin/bash

# Usage: countdown --help

while test $# -gt 0; do
	case "$1" in
		"-h"|"--help")
			showhelp="true"
			shift; continue;;
		"-v"|"--version")
			showversion="true"
			shift; continue;;
		"-a"|"--alarm")
			file="$HOME/.countdown-alarm.wav"
			if [ ! -f "$file" ]; then
				echo "File not found: '$file'" >> /dev/stderr
				exit 1
			fi
			shift; continue;;
		"-f"|"--alarm-file")
			file="$2"
			if [ ! -f "$file" ]; then
				echo "File not found: '$file'" >> /dev/stderr
				exit 1
			fi
			shift; shift; continue;;
		"-m"|"--message")
			message="$2"
			shift; shift; continue;;
		*)
			if [ "$time" == "" ]; then
				time=$1
			else
				time="$time $1"
			fi
			shift; continue;;
	esac
done

if [ "$showversion" == "true" ]; then
	echo "countdown version 1.0"
	exit 0
fi
if [ "$time" == "" ] || [ "$showhelp" == "true" ]; then
	echo "Usage: countdown [OPTION]... TIME"
	echo "Example: countdown -m \"Food's ready\" 1h 30m"
	echo ""
	echo "OPTIONS"
	echo "  -h, --help                print help text"
	echo "  -v, --version             print version info"
	echo "  -a, --alarm               use alarm at \$HOME/.countdown-alarm.wav"
	echo "  -f, --alarm-file FILE     use alarm at FILE on timer completion"
	echo "  -m, --message MESSAGE     notify-send MESSAGE on timer completion"
	echo ""
	echo "See 'man sleep' for details on the formatting for TIME"
	echo ""
	exit 0
fi

sleep "$time" 2>/dev/null

echo -en "\007" # beep
if [ "$message" != "" ]; then
	notify-send "Timer finished: $message"
else
	notify-send "Timer finished"
fi
[ -f "$file" ] && mpv --no-vid "$file"