bin/unicorn_rails

   1 #!/home/ew/bin/ruby
   2 require 'unicorn/launcher'
   3 require 'optparse'
   4 require 'fileutils'
   5
   6 rails_pid = File.join(Unicorn::HttpServer::DEFAULT_START_CTX[:cwd],
   7                       "/tmp/pids/unicorn.pid")
   8 cmd = File.basename($0)
   9 daemonize = false
  10 listeners = []
  11 options = { :listeners => listeners }
  12 host, port = Unicorn::Const::DEFAULT_HOST, Unicorn::Const::DEFAULT_PORT
  13 set_listener = false
  14 ENV['RAILS_ENV'] ||= "development"
  15 map_path = ENV['RAILS_RELATIVE_URL_ROOT']
  16
  17 opts = OptionParser.new("", 24, '  ') do |opts|
  18   opts.banner = "Usage: #{cmd} " \
  19                 "[ruby options] [#{cmd} options] [rackup config file]"
  20   opts.separator "Ruby options:"
  21
  22   lineno = 1
  23   opts.on("-e", "--eval LINE", "evaluate a LINE of code") do |line|
  24     eval line, TOPLEVEL_BINDING, "-e", lineno
  25     lineno += 1
  26   end
  27
  28   opts.on("-d", "--debug", "set debugging flags (set $DEBUG to true)") do
  29     $DEBUG = true
  30   end
  31
  32   opts.on("-w", "--warn", "turn warnings on for your script") do
  33     $-w = true
  34   end
  35
  36   opts.on("-I", "--include PATH",
  37           "specify $LOAD_PATH (may be used more than once)") do |path|
  38     $LOAD_PATH.unshift(*path.split(/:/))
  39   end
  40
  41   opts.on("-r", "--require LIBRARY",
  42           "require the library, before executing your script") do |library|
  43     require library
  44   end
  45
  46   opts.separator "#{cmd} options:"
  47
  48   # some of these switches exist for rackup command-line compatibility,
  49
  50   opts.on("-o", "--host HOST",
  51           "listen on HOST (default: #{Unicorn::Const::DEFAULT_HOST})") do |h|
  52     host = h
  53     set_listener = true
  54   end
  55
  56   opts.on("-p", "--port PORT", "use PORT (default: #{port})") do |p|
  57     port = p.to_i
  58     set_listener = true
  59   end
  60
  61   opts.on("-E", "--env ENVIRONMENT",
  62           "use ENVIRONMENT for defaults (default: development)") do |e|
  63     ENV['RAILS_ENV'] = e
  64   end
  65
  66   opts.on("-D", "--daemonize", "run daemonized in the background") do |d|
  67     daemonize = d ? true : false
  68   end
  69
  70   # Unicorn-specific stuff
  71   opts.on("-l", "--listen {HOST:PORT|PATH}",
  72           "listen on HOST:PORT or PATH",
  73           "this may be specified multiple times",
  74           "(default: #{Unicorn::Const::DEFAULT_LISTEN})") do |address|
  75     listeners << address
  76   end
  77
  78   opts.on("-c", "--config-file FILE", "Unicorn-specific config file") do |f|
  79     options[:config_file] = File.expand_path(f)
  80   end
  81
  82   opts.on("-P", "--path PATH", "Runs Rails app mounted at a specific path.",
  83           "(default: /") do |v|
  84     ENV['RAILS_RELATIVE_URL_ROOT'] = map_path = v
  85   end
  86
  87   # I'm avoiding Unicorn-specific config options on the command-line.
  88   # IMNSHO, config options on the command-line are redundant given
  89   # config files and make things unnecessarily complicated with multiple
  90   # places to look for a config option.
  91
  92   opts.separator "Common options:"
  93
  94   opts.on_tail("-h", "--help", "Show this message") do
  95     puts opts
  96     exit
  97   end
  98
  99   opts.on_tail("-v", "--version", "Show version") do
 100     puts " v#{Unicorn::Const::UNICORN_VERSION}"
 101     exit
 102   end
 103
 104   opts.parse! ARGV
 105 end
 106
 107 config = ARGV[0] || (File.exist?('config.ru') ? 'config.ru' : nil)
 108
 109 if config && config =~ /\.ru$/
 110   # parse embedded command-line options in config.ru comments
 111   if File.open(config, "rb") { |fp| fp.sysread(fp.stat.size) } =~ /^#\\(.*)/
 112     opts.parse! $1.split(/\s+/)
 113   end
 114 end
 115
 116 require 'pp' if $DEBUG
 117
 118 # Loads Rails and the private version of Rack it bundles. Returns a
 119 # lambda of arity==0 that will return *another* lambda of arity==1
 120 # suitable for using inside Rack::Builder.new block.
 121 rails_loader = lambda do ||
 122   begin
 123     require 'config/boot'
 124     defined?(::RAILS_ROOT) or abort "RAILS_ROOT not defined by config/boot"
 125     defined?(::RAILS_ENV) or abort "RAILS_ENV not defined by config/boot"
 126     defined?(::Rails::VERSION::STRING) or
 127       abort "Rails::VERSION::STRING not defined by config/boot"
 128   rescue LoadError => err
 129     abort "#$0 must be run inside RAILS_ROOT: #{err.inspect}"
 130   end
 131   defined?(::RAILS_ROOT) or abort "RAILS_ROOT not defined by config/boot"
 132   defined?(::RAILS_ENV) or abort "RAILS_ENV not defined by config/boot"
 133   defined?(::Rails::VERSION::STRING) or
 134     abort "Rails::VERSION::STRING not defined by config/boot"
 135
 136   case config
 137   when nil
 138     lambda do ||
 139       require 'config/environment'
 140
 141       # it seems Rails >=2.2 support Rack, but only >=2.3 requires it
 142       old_rails = case ::Rails::VERSION::MAJOR
 143       when 0, 1 then true
 144       when 2 then Rails::VERSION::MINOR < 3 ? true : false
 145       else
 146         false
 147       end
 148
 149       if old_rails
 150         require 'rack'
 151         require 'unicorn/app/old_rails'
 152         Unicorn::App::OldRails.new
 153       else
 154         ActionController::Dispatcher.new
 155       end
 156     end
 157   when /\.ru$/
 158     raw = File.open(config, "rb") { |fp| fp.sysread(fp.stat.size) }
 159     lambda { || eval("Rack::Builder.new {(#{raw}\n)}.to_app", nil, config) }
 160   else
 161     lambda do ||
 162       require config
 163       Object.const_get(File.basename(config, '.rb').capitalize)
 164     end
 165   end
 166 end
 167
 168 # this won't run until after forking if preload_app is false
 169 app = lambda do ||
 170   inner_app = rails_loader.call
 171   require 'active_support'
 172   require 'action_controller'
 173   map_path ||= '/'
 174   inner_app = inner_app.call
 175   Rack::Builder.new do
 176     if inner_app.class.to_s == "Unicorn::App::OldRails"
 177       if map_path != '/'
 178         # patches + tests welcome, but I really cbf to deal with this
 179         # since all apps I've ever dealt with just use "/" ...
 180         $stderr.puts "relative URL roots may not work for older Rails"
 181       end
 182       $stderr.puts "LogTailer not available for Rails < 2.3" unless daemonize
 183       $stderr.puts "Debugger not available" if $DEBUG
 184       map(map_path) do
 185         require 'unicorn/app/old_rails/static'
 186         use Unicorn::App::OldRails::Static
 187         run inner_app
 188       end
 189     else
 190       use Rails::Rack::LogTailer unless daemonize
 191       use Rails::Rack::Debugger if $DEBUG
 192       map(map_path) do
 193         use Rails::Rack::Static
 194         run inner_app
 195       end
 196     end
 197   end.to_app
 198 end
 199
 200 listeners << "#{host}:#{port}" if set_listener
 201
 202 if $DEBUG
 203   pp({
 204     :unicorn_options => options,
 205     :app => app,
 206     :daemonize => daemonize,
 207   })
 208 end
 209
 210 # ensure Rails standard tmp paths exist
 211 %w(cache pids sessions sockets).each do |dir|
 212   FileUtils.mkdir_p("tmp/#{dir}")
 213 end
 214
 215 if daemonize
 216   options[:pid] = rails_pid
 217   Unicorn::Launcher.daemonize!
 218 end
 219 Unicorn.run(app, options)