#!/bin/bash

### BEGIN INIT INFO
# Provides:          spawning.debian
# Required-Start:    $all
# Required-Stop:     $all
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts a Spawning daemon
# Description:       starts a Spawning daemon
### END INIT INFO

# Usage instructions:
# - Copy this file to your /etc/init.d directory:
#   $ sudo cp spawning.debian /etc/init.d/spawning.mysite
# - Change the options below in the "Configuration" section.
#   Spawning arguments currently supported are:
#   - host (defaults to 127.0.0.1)
#   - port (defaults to 8080)
#   - access-log (defaults to /dev/null)
#   - stderr (defaults to /dev/null)
#   - chuid (optional)
#   - factory (optional)
#   - processes (optional)
#   If you have additional arguments to provide (such as 
#   max-age, watch, workers etc., add them as follows:
#   EXTRA_ARGS="max-age=1000 --watch=file" etc.
# - Initialise the script to survive reboots:
#   $ sudo update-rc.d spawning.mysite defaults
# - Start your server:
#   $ sudo /etc/init.d/spawning.mysite start

NAME="spawning.debian" # change debian to your own site
DESC="Starts a Spawning daemon to run [domain here]"
# This is where your app or settings.py lives
SITE_DIR=/var/www/mysite/

# CONFIGURATION - edit this stuff
# Configure your own spawning here
SPAWNING_BIN=/usr/local/bin/spawning #Path to Spawning executable
PROCESSES=2 # Number of processes to spawn
# Django by default: delete this var to run a WSGI app
FACTORY="spawning.django_factory.config_factory"
PORT="8080"
HOST="127.0.0.1" # listen on loopback by default
CHUID=""
ACCESS_LOG=/dev/null
ERROR_LOG=/dev/null
APP="settings" # Django by default, but put your own app here
# END CONFIGURATION

# Don't edit this
PIDFILE=/var/run/$NAME.pid

# make sure the access_log file exists
if [ ! -e $ACCESS_LOG ]; then
    touch $ACCESS_LOG
fi
# make sure the error log file exists
if [ ! -e $ERROR_LOG ]; then
    touch $ERROR_LOG
fi

start() {
    echo -n "Starting $NAME on $HOST:$PORT...: "
    DAEMON_ARGS="--host=$HOST --port=$PORT"
    DAEMON_ARGS="$DAEMON_ARGS --stderr=$ERROR_LOG --access-log-file=$ACCESS_LOG"
    [ -n "$PROCESSES" ]  && DAEMON_ARGS="$DAEMON_ARGS --processes=$PROCESSES"
    [ -n "$FACTORY" ]    && DAEMON_ARGS="$DAEMON_ARGS --factory=$FACTORY"
    [ -n "$CHUID" ]      && DAEMON_ARGS="$DAEMON_ARGS --chuid=$CHUID"
    [ -n "$EXTRA_ARGS" ] && DAEMON_ARGS="$DAEMON_ARGS $EXTRA_ARGS"
    DAEMON_ARGS="$DAEMON_ARGS $APP"
    /sbin/start-stop-daemon --start --background --make-pidfile --pidfile=$PIDFILE --chdir $SITE_DIR --exec $SPAWNING_BIN -- $DAEMON_ARGS || return 2
    echo $NAME
    return 0
}

stop () {
    echo -n "Stopping $NAME: "
    /sbin/start-stop-daemon --stop --pidfile $PIDFILE
    rm -f $PIDFILE
    echo $NAME
    return
}

status() {
    if [ -f "$PIDFILE" ]; then
        echo -n "$NAME already running with PIDs: " && cat $PIDFILE && echo
    else
        echo "$NAME not running"
    fi
    return
}

case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    status)
        status
        ;;
    restart)
        stop
        sleep 1
        start
        ;;
    *)
        echo "Usage: $NAME (start|stop|status|restart)"
        exit 1
        ;;
esac
exit $?