Passenger standalone with debugger and pry

start_passenger

#!/usr/bin/env ruby

require 'bundler'
Bundler.setup(:default, :development)
require 'rack-debug/debugger'
require 'pry-remote'

system('rm', '-fv', 'tmp/rack-debug.*')

fork { exec 'bundle', 'exec', 'passenger', 'start' }

fork do
  $0 = 'passenger pry'
  loop { PryRemote::CLI.new(%w(--wait)).run }
end

fork do
  $0 = 'passenger debugger'
  loop do
    begin
      socket_path = File.expand_path('../../tmp/rack-debug', __FILE__)
      Debugger.start_unix_socket_client(socket_path)
    rescue Errno::ECONNREFUSED, Errno::ENOENT => e
      sleep(1)
      retry
    end
  end
end

trap('INT') { Process.waitall; exit }

Process.waitall