bin/unicorn_rails

   1 #!/home/ew/bin/ruby
   2 require 'unicorn/launcher'
   3 require 'optparse'
   4 require 'fileutils'
   5
   6 rails_pid = "#{Unicorn::HttpServer::START_CTX[:cwd]}/tmp/pids/unicorn.pid"
   7 cmd = File.basename($0)
   8 daemonize = false
   9 listeners = []
  10 options = { :listeners => listeners }
  11 host, port = Unicorn::Const::DEFAULT_HOST, Unicorn::Const::DEFAULT_PORT
  12 set_listener = false
  13 ENV['RAILS_ENV'] ||= "development"
  14 map_path = ENV['RAILS_RELATIVE_URL_ROOT']
  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 ENVIRONMENT",
  61           "use ENVIRONMENT 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] = File.expand_path(f)
  79   end
  80
  81   opts.on("-P", "--path PATH", "Runs Rails app mounted at a specific path.",
  82           "(default: /") do |v|
  83     ENV['RAILS_RELATIVE_URL_ROOT'] = map_path = v
  84   end
  85
  86   # I'm avoiding Unicorn-specific config options on the command-line.
  87   # IMNSHO, config options on the command-line are redundant given
  88   # config files and make things unnecessarily complicated with multiple
  89   # places to look for a config option.
  90
  91   opts.separator "Common options:"
  92
  93   opts.on_tail("-h", "--help", "Show this message") do
  94     puts opts
  95     exit
  96   end
  97
  98   opts.on_tail("-v", "--version", "Show version") do
  99     puts " v#{Unicorn::Const::UNICORN_VERSION}"
 100     exit
 101   end
 102
 103   opts.parse! ARGV
 104 end
 105
 106 config = ARGV[0] || (File.exist?('config.ru') ? 'config.ru' : nil)
 107
 108 if config && config =~ /\.ru$/
 109   # parse embedded command-line options in config.ru comments
 110   if File.open(config, "rb") { |fp| fp.sysread(fp.stat.size) } =~ /^#\\(.*)/
 111     opts.parse! $1.split(/\s+/)
 112   end
 113 end
 114
 115 require 'pp' if $DEBUG
 116
 117 # this won't run until after forking if preload_app is false
 118 app = lambda do ||
 119   # Load Rails and the private version of Rack it bundles.
 120   begin
 121     require 'config/boot'
 122   rescue LoadError => err
 123     abort "#$0 must be run inside RAILS_ROOT: #{err.inspect}"
 124   end
 125   defined?(::RAILS_ROOT) or abort "RAILS_ROOT not defined by config/boot"
 126   defined?(::RAILS_ENV) or abort "RAILS_ENV not defined by config/boot"
 127   defined?(::Rails::VERSION::STRING) or
 128     abort "Rails::VERSION::STRING not defined by config/boot"
 129
 130   inner_app = case config
 131   when nil
 132     require 'config/environment'
 133
 134     # it seems Rails >=2.2 support Rack, but only >=2.3 requires it
 135     old_rails = case ::Rails::VERSION::MAJOR
 136     when 0, 1 then true
 137     when 2 then Rails::VERSION::MINOR < 3 ? true : false
 138     else
 139       false
 140     end
 141
 142     if old_rails
 143       require 'rack'
 144       require 'unicorn/app/old_rails'
 145       Unicorn::App::OldRails.new
 146     else
 147       ActionController::Dispatcher.new
 148     end
 149   when /\.ru$/
 150     raw = File.open(config, "rb") { |fp| fp.sysread(fp.stat.size) }
 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   map_path ||= '/'
 158   Rack::Builder.new do
 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         require 'unicorn/app/old_rails/static'
 169         use Unicorn::App::OldRails::Static
 170         run inner_app
 171       end
 172     else
 173       use Rails::Rack::LogTailer unless daemonize
 174       use Rails::Rack::Debugger if $DEBUG
 175       map(map_path) do
 176         use Rails::Rack::Static
 177         run inner_app
 178       end
 179     end
 180   end.to_app
 181 end
 182
 183 listeners << "#{host}:#{port}" if set_listener
 184
 185 if $DEBUG
 186   pp({
 187     :unicorn_options => options,
 188     :app => app,
 189     :daemonize => daemonize,
 190   })
 191 end
 192
 193 # ensure Rails standard tmp paths exist
 194 %w(cache pids sessions sockets).each do |dir|
 195   FileUtils.mkdir_p("tmp/#{dir}")
 196 end
 197
 198 if daemonize
 199   options[:pid] = rails_pid
 200   Unicorn::Launcher.daemonize!
 201 end
 202 Unicorn.run(app, options)