init.d script for chatterbox w/RVM

twitter-bot

#!/bin/sh
### BEGIN INIT INFO
# Provides:          Twitter-Bot
# Required-Start:    $local_fs $network $named $time $syslog
# Required-Stop:     $local_fs $network $named $time $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Description:       Starts the Twitter retweet bot.
### END INIT INFO

SCRIPT=/home/hans/chatterbot/bin/w44co.rb
RUNAS=hans
BUNDLE=/usr/local/rvm/wrappers/global/bundle
SCRIPTHOME=/home/hans/chatterbot
PIDFILE=/home/hans/twitter-bot.pid ## The pid and logfile need to be somwhere writeable.
LOGFILE=/home/hans/twitter-bot.log

start() {
  if [ -f /var/run/$PIDNAME ] && kill -0 $(cat /var/run/$PIDNAME); then
    echo 'Bot already running' >&2
    return 1
  fi
  echo 'Starting bot!' >&2
  local CMD="cd $SCRIPTHOME && $BUNDLE exec $SCRIPT &> \"$LOGFILE\" & echo \$!"
  su -c "$CMD" $RUNAS > "$PIDFILE"
  echo 'Bot running!' >&2
}

stop() {
  if [ ! -f "$PIDFILE" ] || ! kill -0 $(cat "$PIDFILE"); then
    echo 'Bot not running' >&2
    return 1
  fi
  echo 'Stopping bot' >&2
  kill -15 $(cat "$PIDFILE") && rm -f "$PIDFILE"
  echo 'Bot stopped' >&2
}

uninstall() {
  echo -n "Are you really sure you want to uninstall this service? That cannot be undone. [yes|No] "
  local SURE
  read SURE
  if [ "$SURE" = "yes" ]; then
    stop
    rm -f "$PIDFILE"
    echo "Notice: log file is not be removed: '$LOGFILE'" >&2
    update-rc.d -f <NAME> remove
    rm -fv "$0"
  fi
}

case "$1" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  uninstall)
    uninstall
    ;;
  retart)
    stop
    start
    ;;
  *)
    echo "Usage: $0 {start|stop|restart|uninstall}"
esac