module Rails
  class <<self
    def root
      File.expand_path(__FILE__).split('/')[0..-3].join('/')
    end
  end
end

worker_processes 4

working_directory Rails.root

listen "#{Rails.root}/tmp/sockets/socket", :backlog =>
64

timeout 30

pid "#{Rails.root}/tmp/pids/unicorn.pid"

stderr_path "#{Rails.root}/log/unicorn.log"
stdout_path "#{Rails.root}/log/unicorn.log"

# combine Ruby 2.0.0dev or REE with "preload_app true" for memory savings
# http://rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
preload_app true
GC.respond_to?(:copy_on_write_friendly=) and
  GC.copy_on_write_friendly = true

check_client_connection false

before_fork do |server, worker|
  # the following is highly recomended for Rails + "preload_app true"
  # as there's no need for the master process to hold a connection
  defined?(ActiveRecord::Base) and
    ActiveRecord::Base.connection.disconnect!

  old_pid = "#{server.config[: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

  # Throttle the master from forking too quickly by sleeping.  Due
  # to the implementation of standard Unix signal handlers, this
  # helps (but does not completely) prevent identical, repeated signals
  # from being lost when the receiving process is busy.
  sleep 1
end

after_fork do |server, worker|

  # the following is *required* for Rails + "preload_app true",
  defined?(ActiveRecord::Base) and
    ActiveRecord::Base.establish_connection

  # if preload_app is true, then you may also want to check and
  # restart any other shared sockets/descriptors such as Memcached,
  # and Redis.  TokyoCabinet file handles are safe to reuse
  # between any number of forked children (assuming your kernel
  # correctly implements pread()/pwrite() system calls)
end

sudo kill -USR2 `cat path/to/app/tmp/pids/unicorn.pid`

upstream app{
  server unix:///path/to/app/tmp/sockets/socket;
}
server {
  listen 80;
  server_name app;
  root path/to/app/public;
  try_files $uri/index.html $uri.html $uri @app;
  location ~ ^/(assets)/ {
    expires max;
    add_header Cache-Control public;
  }
  location ~ .*\.(php|sql|asp)?$ {
    deny all;
  }
  location @app {
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect off;
    proxy_pass http://app;
  }
  location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
  {
    expires 30d;
  }
  location ~ .*\.(js|css)?$
  {
    expires 1h;
  }
  access_log logs/app.log;
}