#!/usr/bin/env bash
# Copyright 2016 Luke Shumaker
# This work is free. You can redistribute it and/or modify it under the
# terms of the Do What The Fuck You Want To Public License, Version 2,
# as published by Sam Hocevar. See the COPYING file for more details.

declare -r workdir=/var/lib/pristine-etc
declare -r bindir=/etc/etckeeper/pristine

lock() {
	local fd=$1
	local file=$2
	eval "exec $fd>"'"$file"'
	flock "${@:3}" "$fd"
}

unlock() {
	local fd=$1
	exec {fd}>&-
}

drain() {
	if [[ -d /run/systemd/system ]]; then
		systemctl reset-failed pristine-etc-keeper.service &>/dev/null || true
		systemctl start        pristine-etc-keeper.service
	else
		nohup "${bindir}/drain" <&- &> /dev/null &
	fi
}

main() {
	set -e
	umask 0022

	if [[ $# -gt 0 ]]; then
		lock 8 "${workdir}/spool.lock"
		printf '%s\n' "$*" >> "${workdir}/spool"
		unlock 8
	fi

	drain
}

main "$@"