force figaro ENV vars to reload on unicorn USR2 restarts

unicorn.rb

root = "/var/www/cake/current"
working_directory root
pid "#{root}/tmp/pids/unicorn.pid"
stderr_path "#{root}/log/unicorn.stderr.log"
stdout_path "#{root}/log/unicorn.log"

listen "/tmp/unicorn.cake.sock"
worker_processes 2
timeout 15

preload_app true

before_exec do |server|
  ENV['BUNDLE_GEMFILE'] = "#{root}/Gemfile"
end

before_fork do |server, worker|
  # Disconnect since the database connection will not carry over
  if defined? ActiveRecord::Base
    ActiveRecord::Base.connection.disconnect!
    Phr::Table.connection.disconnect!
  end

  Figaro.env.each do |key, value|
    ENV[key] = value
  end

  old_pid = "#{root}/tmp/pids/unicorn.pid.oldbin"

  if File.exists?(old_pid) && old_pid != server.pid
    begin
      sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU
      Process.kill(sig, File.read(old_pid).to_i)
    rescue Errno::ENOENT, Errno::ESRCH
    end
  end
end

after_fork do |server, worker|
  # Start up the database connection again in the worker
  if defined?(ActiveRecord::Base)
    ActiveRecord::Base.establish_connection
    #Phr::Table.establish_connection
  end
  child_pid = server.config[:pid].sub(".pid", ".#{worker.nr}.pid")
  system("echo #{Process.pid} > #{child_pid}")
end