start-alarmclock

#!/bin/bash

# Mandatory parameters
soundClipPath="" #Abs path
sinkName="" #Check `pactl list short sinks`, it looks like "alsa_output.pci-0000_00_1b.0.analog-stereo"
initialVolume="25%"

# Increasing volume
volumeStepIncrease="+5%"
volumeStepDuration="10s"
volumeSteps="8"

# Maximum duration
alarmTimeout="45m"

# Check for non-coreutils deps
# Blatently stolen from : http://stackoverflow.com/a/4785518/2178646
command -v ffplay >/dev/null 2>&1 || { echo "ffplay not found. systemd-alarmclock requires on ffmpeg." >&2; exit 1; }
command -v pactl >/dev/null 2>&1 || { echo "pactl not found. systemd-alarmclock requires on pulseaudio." >&2; exit 1; }

# Check if soundClipPath exists
if [ ! -e "$soundClipPath" ]; then
	echo "$soundClipPath : file not found, aborting."
	exit 1
fi

sink=$(pactl list short sinks | grep "$sinkName" | cut -f1)
echo "Sink #${sink:?No sink by the name of \"$sinkName\".}"

scriptArgs=($soundClipPath $sink $initialVolume $volumeStepIncrease \
		$volumeStepDuration $volumeSteps)

trap : INT TERM

cd "$( dirname "${BASH_SOURCE[0]}")"
if [ -n "$alarmTimeout" ]; then
	timeout "$alarmTimeout" ./alarmclock ${scriptArgs[@]}&
else
	./alarmclock ${scriptArgs[@]}&
fi

# One of the less obvious things in bash is how signals propagate through subprocesses
# Gracefully solved by : http://stackoverflow.com/a/1645157
childPID=$!
wait $childPID

if [[ $? -gt 128 ]]
then
    kill $childPID
fi