bin/unicorn_rails

   1 #!/this/will/be/overwritten/or/wrapped/anyways/do/not/worry/ruby
   2 # -*- encoding: binary -*-
   3 require 'unicorn/launcher'
   4 require 'optparse'
   5 require 'fileutils'
   6
   7 daemonize = false
   8 options = { :listeners => [] }
   9 host, port = Unicorn::Const::DEFAULT_HOST, Unicorn::Const::DEFAULT_PORT
  10 set_listener = false
  11 ENV['RAILS_ENV'] ||= "development"
  12
  13 opts = OptionParser.new("", 24, '  ') do |opts|
  14   cmd = File.basename($0)
  15   opts.banner = "Usage: #{cmd} " \
  16                 "[ruby options] [#{cmd} options] [rackup config file]"
  17   opts.separator "Ruby options:"
  18
  19   lineno = 1
  20   opts.on("-e", "--eval LINE", "evaluate a LINE of code") do |line|
  21     eval line, TOPLEVEL_BINDING, "-e", lineno
  22     lineno += 1
  23   end
  24
  25   opts.on("-d", "--debug", "set debugging flags (set $DEBUG to true)") do
  26     $DEBUG = true
  27   end
  28
  29   opts.on("-w", "--warn", "turn warnings on for your script") do
  30     $-w = true
  31   end
  32
  33   opts.on("-I", "--include PATH",
  34           "specify $LOAD_PATH (may be used more than once)") do |path|
  35     $LOAD_PATH.unshift(*path.split(/:/))
  36   end
  37
  38   opts.on("-r", "--require LIBRARY",
  39           "require the library, before executing your script") do |library|
  40     require library
  41   end
  42
  43   opts.separator "#{cmd} options:"
  44
  45   # some of these switches exist for rackup command-line compatibility,
  46
  47   opts.on("-o", "--host HOST",
  48           "listen on HOST (default: #{Unicorn::Const::DEFAULT_HOST})") do |h|
  49     host = h
  50     set_listener = true
  51   end
  52
  53   opts.on("-p", "--port PORT", "use PORT (default: #{port})") do |p|
  54     port = p.to_i
  55     set_listener = true
  56   end
  57
  58   opts.on("-E", "--env RAILS_ENV",
  59           "use RAILS_ENV for defaults (default: development)") do |e|
  60     ENV['RAILS_ENV'] = e
  61   end
  62
  63   opts.on("-D", "--daemonize", "run daemonized in the background") do |d|
  64     daemonize = d ? true : false
  65   end
  66
  67   # Unicorn-specific stuff
  68   opts.on("-l", "--listen {HOST:PORT|PATH}",
  69           "listen on HOST:PORT or PATH",
  70           "this may be specified multiple times",
  71           "(default: #{Unicorn::Const::DEFAULT_LISTEN})") do |address|
  72     options[:listeners] << address
  73   end
  74
  75   opts.on("-c", "--config-file FILE", "Unicorn-specific config file") do |f|
  76     options[:config_file] = f
  77   end
  78
  79   opts.on("-P PATH", "DEPRECATED") do |v|
  80     warn %q{Use of -P is ambiguous and discouraged}
  81     warn %q{Use --path or RAILS_RELATIVE_URL_ROOT instead}
  82     ENV['RAILS_RELATIVE_URL_ROOT'] = v
  83   end
  84
  85   opts.on("--path PATH", "Runs Rails app mounted at a specific path.",
  86           "(default: /)") do |v|
  87     ENV['RAILS_RELATIVE_URL_ROOT'] = v
  88   end
  89
  90   # I'm avoiding Unicorn-specific config options on the command-line.
  91   # IMNSHO, config options on the command-line are redundant given
  92   # config files and make things unnecessarily complicated with multiple
  93   # places to look for a config option.
  94
  95   opts.separator "Common options:"
  96
  97   opts.on_tail("-h", "--help", "Show this message") do
  98     puts opts.to_s.gsub(/^.*DEPRECATED.*$/s, '')
  99     exit
 100   end
 101
 102   opts.on_tail("-v", "--version", "Show version") do
 103     puts "#{cmd} v#{Unicorn::Const::UNICORN_VERSION}"
 104     exit
 105   end
 106
 107   opts.parse! ARGV
 108 end
 109
 110 def rails_dispatcher
 111   if ::Rails::VERSION::MAJOR >= 3 && ::File.exist?('config/application.rb')
 112     if ::File.read('config/application.rb') =~ /^module\s+([\w:]+)\s*$/
 113       app_module = Object.const_get($1)
 114       begin
 115         result = app_module::Application
 116       rescue NameError
 117       end
 118     end
 119   end
 120
 121   if result.nil? && defined?(ActionController::Dispatcher)
 122     result = ActionController::Dispatcher.new
 123   end
 124
 125   result || abort("Unable to locate the application dispatcher class")
 126 end
 127
 128 def rails_builder(ru, opts, daemonize)
 129   return Unicorn.builder(ru, opts) if ru
 130
 131   # allow Configurator to parse cli switches embedded in the ru file
 132   Unicorn::Configurator::RACKUP.update(:file => :rails, :optparse => opts)
 133
 134   # this lambda won't run until after forking if preload_app is false
 135   # this runs after config file reloading
 136   lambda do ||
 137     # Rails 3 includes a config.ru, use it if we find it after
 138     # working_directory is bound.
 139     ::File.exist?('config.ru') and
 140       return Unicorn.builder('config.ru', opts).call
 141
 142     # Load Rails and (possibly) the private version of Rack it bundles.
 143     begin
 144       require ::File.expand_path('config/boot')
 145       require ::File.expand_path('config/environment')
 146     rescue LoadError => err
 147       abort "#$0 must be run inside RAILS_ROOT: #{err.inspect}"
 148     end
 149
 150     defined?(::Rails::VERSION::STRING) or
 151       abort "Rails::VERSION::STRING not defined by config/{boot,environment}"
 152     # it seems Rails >=2.2 support Rack, but only >=2.3 requires it
 153     old_rails = case ::Rails::VERSION::MAJOR
 154     when 0, 1 then true
 155     when 2 then Rails::VERSION::MINOR < 3 ? true : false
 156     else
 157       false
 158     end
 159
 160     Rack::Builder.new do
 161       map_path = ENV['RAILS_RELATIVE_URL_ROOT'] || '/'
 162       if old_rails
 163         if map_path != '/'
 164           # patches + tests welcome, but I really cbf to deal with this
 165           # since all apps I've ever dealt with just use "/" ...
 166           warn "relative URL roots may not work for older Rails"
 167         end
 168         warn "LogTailer not available for Rails < 2.3" unless daemonize
 169         warn "Debugger not available" if $DEBUG
 170         require 'unicorn/app/old_rails'
 171         map(map_path) do
 172           use Unicorn::App::OldRails::Static
 173           run Unicorn::App::OldRails.new
 174         end
 175       else
 176         use Rails::Rack::LogTailer unless daemonize
 177         use Rails::Rack::Debugger if $DEBUG
 178         map(map_path) do
 179           unless defined?(ActionDispatch::Static)
 180             use Rails::Rack::Static
 181           end
 182           run rails_dispatcher
 183         end
 184       end
 185     end.to_app
 186   end
 187 end
 188
 189 app = rails_builder(ARGV[0], opts, daemonize)
 190 options[:listeners] << "#{host}:#{port}" if set_listener
 191
 192 if $DEBUG
 193   require 'pp'
 194   pp({
 195     :unicorn_options => options,
 196     :app => app,
 197     :daemonize => daemonize,
 198   })
 199 end
 200
 201 # ensure Rails standard tmp paths exist
 202 options[:after_reload] = lambda do
 203   FileUtils.mkdir_p(%w(cache pids sessions sockets).map! { |d| "tmp/#{d}" })
 204 end
 205
 206 if daemonize
 207   options[:pid] = "tmp/pids/unicorn.pid"
 208   Unicorn::Launcher.daemonize!(options)
 209 end
 210 Unicorn.run(app, options)