#!/bin/sh
#
# Enable and disable systemd services. The systemd_services environmental
# variable is expected to be set as follows:
#
# SERVICE_NAME	RESTART
# foo.service	off
# blah.service	on
#
# i.e systemd_services='foo.service off blah.service on'
#
# Arguments:	$ACTION = [run/targets]
#		$TARGET	= [post-install/pre-remove]
#		$PKGNAME
#		$VERSION
#		$UPDATE = [yes/no]
#
ACTION="$1"
TARGET="$2"
PKGNAME="$3"
VERSION="$4"
UPDATE="$5"

export PATH="$PATH:/usr/local/bin"

case "$ACTION" in
targets)
	echo "post-install pre-remove"
	;;
run)
	[ ! -x bin/systemctl ] && exit 0
	[ -z "${systemd_services}" ] && exit 1

	if [ -e sys/fs/cgroups/systemd ]; then
		systemd_booted=yes
	fi

	set -- ${systemd_services}
	while [ $# -gt 0 ]; do
		_srv="$1"
		case "$2" in
		[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
			restart=1
			;;
		*)
			unset restart
			;;
		esac
		if [ "$TARGET" = "pre-remove" ]; then
			if [ "$UPDATE" = "no" ]; then
				# package is being removed.
				# disable and stop the unit.
				systemctl --no-reload disable ${_srv} >/dev/null 2>&1 || :
				systemctl stop ${_srv} >/dev/null 2>&1 || :
			fi
		elif [ "$TARGET" = "post-install" ]; then
			if [ "$UPDATE" = "no" ]; then
				# package is being installed.
				# enable (but don't start) the unit by default.
				systemctl enable ${_srv} >/dev/null 2>&1 || :
				if [ "$systemd_booted" ]; then
					# reload systemd if running.
					systemctl daemon-reload >/dev/null 2>&1 || :
				fi
			else
				# package is being updated.
				if [ "$system_booted" ]; then
					# reload systemd if running.
					systemctl daemon-reload >/dev/null 2>&1 || :
				fi
				if [ -n "$restart" ]; then
					# try restarting package service.
					systemctl try-restart ${_srv} >/dev/null 2>&1 || :
				else
					echo "systemd ${_srv} service must be restarted manually!"
				fi
			fi
		fi
		shift; shift
	done
	;;
*)
	exit 1
	;;
esac

exit 0