#! /bin/sh
### BEGIN INIT INFO
# Provides:          gunicorn-initscript
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Should-Start:      $nginx
# Default-Start:     30 2 3 4 5
# Default-Stop:      70 0 1 6
# Short-Description: virtualenv + gunicorn + nginx debian init script
# Description:       virtualenv + gunicorn + nginx debian init script
### END INIT INFO

# Author: Nicolas Kuttler <hidden>
#
# Please remove the "Author" lines above and replace them
# with your own name if you copy and modify this script.
#
# Enable with update-rc.d gunicorn-example start 30 2 3 4 5 . stop 70 0 1 6 .
# (parameters might not be necessary, test)

# Do NOT "set -e"

PROJECT=/path/to/project/
VIRTUALENV=/path/to/virtualenv
PORT=8888
LOGDIR=/var/log/gunicorn/
# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/bin:/usr/bin
USER=www-data
GROUP=www-data
IP=127.0.0.1
WORKERS=5
# I am lazy and just call the init script gunicorn-project
NAME=`basename $0`
DESC=$NAME
LOGFILE="$LOGDIR$NAME.log"
PIDFILE="$PROJECT$NAME.pid"
CMD="gunicorn_django --user=$USER --group=$GROUP --daemon --workers=$WORKERS --bind=$IP:$PORT --pid=$PIDFILE --name=$NAME --log-file=$LOGFILE --log-level=info"

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions

#
# Function that starts the daemon/service
#
do_start() {
	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started
	if [ -e $PIDFILE ]; then
		return 1
	fi
	cd $PROJECT
	. $VIRTUALENV/bin/activate
	$CMD
	if [ $? = 0 ]; then
		return 0
	else
		return 2
	fi
}

#
# Function that stops the daemon/service
#
do_stop() {
	# Return
	#   0 if daemon has been stopped
	#   1 if daemon was already stopped
	#   2 if daemon could not be stopped
	#   other if a failure occurred
	if [ -f $PIDFILE ]; then
		PID=`cat $PIDFILE`
		rm $PIDFILE
		kill -15 $PID
		if [ $? = 0 ]; then
			return 0
		else
			return 2
		fi
	else
		return 1
	fi
}

do_reload() {
	if [ -f $PIDFILE ]; then
		PID=`cat $PIDFILE`
		kill -HUP $PID
		return $?
	fi
	return 2
}

case "$1" in
  start)
	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
	do_start
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  stop)
	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
	do_stop
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  restart)
	log_daemon_msg "Restarting $DESC" "$NAME"
	do_stop
	case "$?" in
	  0|1)
		do_start
		case "$?" in
			0) log_end_msg 0 ;;
			1) log_end_msg 1 ;; # Old process is still running
			*) log_end_msg 1 ;; # Failed to start
		esac
		;;
	  *)
	  	# Failed to stop
		log_end_msg 1
		;;
	esac
	;;
  reload)
	log_daemon_msg "Reloading $DESC" "$NAME"
	do_reload
	case "$?" in
		0) log_end_msg 0 ;;
		*) log_end_msg 1 ;;
	esac
	;;
  *)
	echo "Usage: $SCRIPTNAME {start|stop|restart|reload}" >&2
	exit 3
	;;
esac

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