Automatically kill zombie Thin servers when booting up a rails server

rails

#!/usr/bin/env ruby
# script/rails
# This command will automatically be run when you run "rails" with Rails 3 gems installed from the root of your application.

# Automatically kill zombie Thin servers when booting up a rails server
if ENV['RACK_ENV'] == 'development' && pid = `ps -ef | grep thin | grep -v grep | sort -r | sed -n 2p | awk '{print $2}'`
  puts "=> Killing existing server with pid #{pid}"
  `kill -9 #{pid}`
end

APP_PATH = File.expand_path('../../config/application',  __FILE__)
require File.expand_path('../../config/boot',  __FILE__)
require 'rails/commands'