bin/unicorn_rails

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