#!/bin/bash

### BEGIN INIT INFO
# Provides:		jenkins-slave
# Required-Start:	$remote_fs $syslog
# Required-Stop:	$remote_fs $syslog
# Default-Start:	2 3 4 5
# Default-Stop:
# Short-Description:	Jenkins slave
### END INIT INFO

set -e

# /etc/init.d/jenkins-slave: start and stop Jenkins slave

if test -f /etc/default/jenkins-slave; then
	. /etc/default/jenkins-slave
else
	echo "Configuration for jenkins-slave does not exist" 1>&2
	exit 1
fi

. /lib/lsb/init-functions

COMMAND="/usr/bin/java"
COMMAND_ARGS="-jar slave.jar ${JENKINS_ARGS}"

function check_running() {
	start-stop-daemon -T --pidfile ${PIDFILE}
	ret=$?
	if [ $ret -ne 0 ]; then
		log_end_msg 1 || true
		exit $ret
	fi
}

function start() {
	# Get slave.jar from master
	[ -f ${JENKINS_HOME}/slave.jar ] || wget -O ${JENKINS_HOME}/slave.jar -q ${JENKINS_URL}/jnlpJars/slave.jar

	if start-stop-daemon -c ${JENKINS_USER} -d ${JENKINS_HOME} --background --start --quiet --oknodo -m --pidfile ${PIDFILE} --exec ${COMMAND} -- ${COMMAND_ARGS}; then
		log_end_msg 0 || true
	else
		log_end_msg 1 || true
	fi
}

function stop() {
	if start-stop-daemon --stop --quiet --oknodo --pidfile ${PIDFILE}; then
		log_end_msg 0 || true
	else
		log_end_msg 1 || true
	fi
}

case "$1" in
	start)
		log_daemon_msg "Starting Jenkins slave" "jenkins-slave" || true
		start
		;;
	stop)
		log_daemon_msg "Stopping Jenkins slave" "jenkins-slave" || true
		stop
		;;
	status)
		status_of_proc -p ${PIDFILE} ${COMMAND} jenkins-slave && exit 0 || exit $?
		;;
	restart)
		log_daemon_msg "Restarting Jenkins slave" "jenkins-slave" || true
		stop
		start
		;;

	*)
		log_action_msg "Usage: /etc/init.d/jenkins-slave {start|stop|restart}" || true
		exit 1
		;;
esac

exit 0