bin/zbatery

   1 #!/usr/bin/ruby
   2 # -*- encoding: binary -*-
   3 require 'unicorn/launcher'
   4 require 'zbatery'
   5 require 'optparse'
   6
   7 ENV["RACK_ENV"] ||= "development"
   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
  14 opts = OptionParser.new("", 24, '  ') do |opts|
  15   opts.banner = "Usage: #{File.basename($0)} " \
  16                 "[ruby options] [zbatery 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 "Zbatery 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     set_listener = true
  52   end
  53
  54   opts.on("-p", "--port PORT",
  55           "use PORT (default: #{Unicorn::Const::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["RACK_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", "DEPRECATED") do |f|
  70     warn %q{Use of --pid/-P is strongly discouraged}
  71     warn %q{Use the 'pid' directive in the Zbatery config file instead}
  72     options[:pid] = f
  73   end
  74
  75   opts.on("-s", "--server SERVER",
  76           "this flag only exists for compatibility") do |s|
  77     warn "-s/--server only exists for compatibility with rackup"
  78   end
  79
  80   # Zbatery/Unicorn-specific stuff
  81   opts.on("-l", "--listen {HOST:PORT|PATH}",
  82           "listen on HOST:PORT or PATH",
  83           "this may be specified multiple times",
  84           "(default: #{Unicorn::Const::DEFAULT_LISTEN})") do |address|
  85     listeners << address
  86   end
  87
  88   opts.on("-c", "--config-file FILE", "Unicorn-specific config file") do |f|
  89     options[:config_file] = f
  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 "zbatery v#{Zbatery::VERSION}"
 106     exit
 107   end
 108
 109   opts.parse! ARGV
 110 end
 111
 112 config = ARGV[0] || "config.ru"
 113 abort "configuration file #{config} not found" unless File.exist?(config)
 114
 115 if config =~ /\.ru$/
 116   # parse embedded command-line options in config.ru comments
 117   if File.open(config, "rb") { |fp| fp.sysread(fp.stat.size) } =~ /^#\\(.*)/
 118     opts.parse! $1.split(/\s+/)
 119   end
 120 end
 121
 122 require 'pp' if $DEBUG
 123
 124 app = lambda do ||
 125   # require Rack as late as possible in case $LOAD_PATH is modified
 126   # in config.ru or command-line
 127   inner_app = case config
 128   when /\.ru$/
 129     raw = File.open(config, "rb") { |fp| fp.sysread(fp.stat.size) }
 130     raw.sub!(/^__END__\n.*/, '')
 131     eval("Rack::Builder.new {(#{raw}\n)}.to_app", nil, config)
 132   else
 133     require config
 134     Object.const_get(File.basename(config, '.rb').capitalize)
 135   end
 136   pp({ :inner_app => inner_app }) if $DEBUG
 137   case ENV["RACK_ENV"]
 138   when "development"
 139     Rack::Builder.new do
 140       use Rack::CommonLogger, $stderr
 141       use Rack::ShowExceptions
 142       use Rack::Lint
 143       run inner_app
 144     end.to_app
 145   when "deployment"
 146     Rack::Builder.new do
 147       use Rack::CommonLogger, $stderr
 148       run inner_app
 149     end.to_app
 150   else
 151     inner_app
 152   end
 153 end
 154
 155 listeners << "#{host}:#{port}" if set_listener
 156
 157 if $DEBUG
 158   pp({
 159     :zbatery_options => options,
 160     :app => app,
 161     :daemonize => daemonize,
 162   })
 163 end
 164
 165 Unicorn::Launcher.daemonize! if daemonize
 166 Zbatery.run(app, options)