spin-script.rb

#!/usr/bin/env ruby

UNICORN_RAILS="/var/www/apps/ruby/bin/unicorn_rails".freeze
APP_PATH="/var/www/apps/jjsingh/current/".freeze

class Runner
  class << self

    def start
      system "#{UNICORN_RAILS} -c #{APP_PATH}/config/unicorn.rb -E production -D"
    end

    def reload
      system "kill -s USR2 #{pid}"
    end

    def restart
      stop
      start
    end

    def graceful_stop
      system "kill -s QUIT #{pid}" 
    end

    def stop
      system "kill #{pid}" 
    end

    def pid
      File.read "#{APP_PATH}/tmp/pids/unicorn.pid"
    end

  end
end

case ARGV[0]
when "start"
  Runner.start
when "reload"
  Runner.reload
when "restart"
  Runner.restart
when "stop"
  Runner.stop
else
  STDERR.puts "usage ./script/spin [start|stop|restart]"
  exit(1)
end