Simple wrapper around rackup that restarts Rack when files change (uses inotify-tools' inotifywait)

rerackup

#!/bin/sh
trap Terminate SIGINT SIGTERM SIGQUIT SIGKILL

Start () {
  echo "Starting rack..."
  rackup $@ &
  echo $! > /tmp/rerackup.pid
}

Stop () {
  echo "Stopping rack..."
  kill `cat /tmp/rerackup.pid`
  rm /tmp/rerackup.pid
}

Terminate () {
  Stop
  echo "Terminating rerackup..."
  exit 0
}

Restart () {
  Stop
  Start $@
  WatchForChanges $@
}

WatchForChanges () {
  echo "Watching for changes"
  inotifywait -r -q -e modify .
  Restart $@
}

WatchForChanges $@ & Start $@
wait