bin/unicorn

   1 #!/home/ew/bin/ruby
   2 $stdin.sync = $stdout.sync = $stderr.sync = true
   3 require 'unicorn' # require this first to populate Unicorn::DEFAULT_START_CTX
   4 require 'rack'
   5 require 'optparse'
   6
   7 env = "development"
   8 daemonize = false
   9 listeners = []
  10 options = { :listeners => listeners }
  11 host = Unicorn::Const::DEFAULT_HOST
  12 port = Unicorn::Const::DEFAULT_PORT
  13
  14 opts = OptionParser.new("", 24, '  ') do |opts|
  15   opts.banner = "Usage: #{File.basename($0)} " \
  16                 "[ruby options] [unicorn options] [rackup config file]"
  17
  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 "Unicorn 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   end
  52
  53   opts.on("-p", "--port PORT",
  54           "use PORT (default: #{Unicorn::Const::DEFAULT_PORT})") do |p|
  55     port = p.to_i
  56   end
  57
  58   opts.on("-E", "--env ENVIRONMENT",
  59           "use ENVIRONMENT for defaults (default: development)") do |e|
  60     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     listeners << address
  73   end
  74
  75   opts.on("-C", "--directory PATH", "run in this directory") do |d|
  76     options[:directory] = d
  77   end
  78
  79   opts.on("-c", "--config-file FILE", "Unicorn-specific config file") do |f|
  80     options[:config_file] = File.expand_path(f)
  81   end
  82
  83   # I'm avoiding Unicorn-specific config options on the command-line.
  84   # IMNSHO, config options on the command-line are redundant given
  85   # config files and make things unnecessarily complicated with multiple
  86   # places to look for a config option.
  87
  88   opts.separator "Common options:"
  89
  90   opts.on_tail("-h", "--help", "Show this message") do
  91     puts opts
  92     exit
  93   end
  94
  95   opts.on_tail("-v", "--version", "Show version") do
  96     puts "unicorn v#{Unicorn::Const::UNICORN_VERSION}"
  97     exit
  98   end
  99
 100   opts.parse! ARGV
 101 end
 102
 103 require 'pp' if $DEBUG
 104
 105 config = ARGV[0] || "config.ru"
 106 abort "configuration file #{config} not found" unless File.exist?(config)
 107
 108 inner_app = case config
 109 when /\.ru$/
 110   raw = File.open(config, "rb") { |fp| fp.sysread(fp.stat.size) }
 111   if raw[/^#\\(.*)/]
 112     warn %(not parsing embedded command-line options: "#$1")
 113   end
 114   lambda { || eval("Rack::Builder.new {(#{raw}\n)}.to_app", nil, config) }
 115 else
 116   lambda do ||
 117     require config
 118     Object.const_get(File.basename(config, '.rb').capitalize)
 119   end
 120 end
 121
 122 app = case env
 123 when "development"
 124   lambda do ||
 125     Rack::Builder.new do
 126       use Rack::CommonLogger, $stderr
 127       use Rack::ShowExceptions
 128       use Rack::Lint
 129       run inner_app.call
 130     end.to_app
 131   end
 132 when "deployment"
 133   lambda do ||
 134     Rack::Builder.new do
 135       use Rack::CommonLogger, $stderr
 136       run inner_app.call
 137     end.to_app
 138   end
 139 else
 140   inner_app
 141 end
 142
 143 if listeners.empty?
 144   listener = "#{host}:#{port}"
 145   listeners << listener if listener != Unicorn::Const::DEFAULT_LISTEN
 146 end
 147
 148 if $DEBUG
 149   pp({
 150     :unicorn_options => options,
 151     :app => app,
 152     :inner_app => inner_app,
 153     :daemonize => daemonize,
 154   })
 155 end
 156
 157 # only daemonize if we're not inheriting file descriptors from our parent
 158 if daemonize
 159
 160   $stdin.reopen("/dev/null")
 161   unless ENV['UNICORN_FD']
 162     exit if fork
 163     Process.setsid
 164     exit if fork
 165   end
 166
 167   # We don't do a lot of standard daemonization stuff:
 168   #   * $stderr/$stderr can/will be redirected separately
 169   #   * umask is whatever was set by the parent process at startup
 170   #     and can be set in config.ru and config_file, so making it
 171   #     0000 and potentially exposing sensitive log data can be bad
 172   #     policy.
 173   #   * Don't bother to chdir here since Unicorn is designed to
 174   #     run inside APP_ROOT (or whatever the "directory" directive
 175   #     specifies).  Unicorn will also re-chdir() to the directory
 176   #     it was started in when being re-executed to pickup code
 177   #     changes if the original deployment directory is a symlink
 178   #     or otherwise got replaced.
 179 end
 180
 181 Unicorn.run(app, options)