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