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 ""
  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 ""
  46   opts.separator "Unicorn options:"
  47
  48   # some of these switches exist for rackup command-line compatibility,
  49
  50   opts.on("-o", "--host HOST", "listen on HOST (default: 0.0.0.0)") do |h|
  51     warn "The --host/-o option is not recommended, see --listen/-l"
  52     host = h
  53   end
  54
  55   opts.on("-p", "--port PORT", "use PORT (default: 8080)") do |p|
  56     warn "The --port/-p option is not recommended, see --listen/-l"
  57     port = p.to_i
  58   end
  59
  60   opts.on("-E", "--env ENVIRONMENT",
  61           "use ENVIRONMENT for defaults (default: development)") do |e|
  62     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   opts.on("-P", "--pid FILE", "file to store PID (default: none)") do |f|
  70     options[:pid] = File.expand_path(f)
  71   end
  72
  73   # Unicorn-specific stuff
  74   opts.on("-l", "--listen <address:port|/path/to/socket>",
  75           "listen on address:port or UNIX socket " \
  76           "(default: 0.0.0.0:8080)" \
  77           "  this may be specified multiple times") do |address|
  78     listeners << address
  79   end
  80
  81   opts.on("-C", "--directory PATH", "run in this directory") do |d|
  82     options[:directory] = d
  83   end
  84
  85   opts.on("-c", "--config-file FILE", "Unicorn-specific config file") do |f|
  86     options[:config_file] = File.expand_path(f)
  87   end
  88
  89   # I'm avoiding Unicorn-specific config options on the command-line.
  90   # IMNSHO, config options on the command-line are redundant given a
  91   # config files and make things unnecessarily complicated with multiple
  92   # places to look for a config option.
  93
  94   opts.separator ""
  95   opts.separator "Common options:"
  96
  97   opts.on_tail("-h", "--help", "Show this message") do
  98     puts opts
  99     exit
 100   end
 101
 102   opts.on_tail("--version", "Show version") do
 103     puts "unicorn v#{Unicorn::Const::UNICORN_VERSION}"
 104     exit
 105   end
 106
 107   opts.parse! ARGV
 108 end
 109
 110 require 'pp' if $DEBUG
 111
 112 config = ARGV[0] || "config.ru"
 113 abort "configuration file #{config} not found" unless File.exist?(config)
 114
 115 if config =~ /\.ru$/
 116   cfgfile = File.read(config)
 117   if cfgfile[/^#\\(.*)/]
 118     warn %(not parsing embedded command-line options: "#$1")
 119   end
 120   inner_app = eval "Rack::Builder.new {(#{cfgfile}\n)}.to_app", nil, config
 121 else
 122   require config
 123   inner_app = Object.const_get(File.basename(config, '.rb').capitalize)
 124 end
 125
 126 app = case env
 127 when "development"
 128   Rack::Builder.new do
 129     use Rack::CommonLogger, STDERR
 130     use Rack::ShowExceptions
 131     use Rack::Lint
 132     run inner_app
 133   end.to_app
 134 when "deployment"
 135   Rack::Builder.new do
 136     use Rack::CommonLogger, STDERR
 137     run inner_app
 138   end.to_app
 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   unless ENV['UNICORN_FD']
 160     exit if fork
 161     Process.setsid
 162     exit if fork
 163   end
 164
 165   Dir.chdir("/") # setting options[:directory] will override this later on
 166   File.umask(0000)
 167   STDIN.reopen("/dev/null")
 168
 169   # we can redirect these again in the Unicorn {before,after}_fork hooks
 170   STDOUT.reopen("/dev/null", "a")
 171   STDERR.reopen("/dev/null", "a")
 172 end
 173
 174 Unicorn.run(app, options)