Class: Puma::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/puma/cli.rb

Overview

Handles invoke a Puma::Server in a command line style.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(argv, events = Events.stdio) ⇒ CLI

Create a new CLI object using argv as the command line arguments.

stdout and stderr can be set to IO-like objects which this object will report status on.



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# File 'lib/puma/cli.rb', line 27

def initialize(argv, events=Events.stdio)
  @debug = false
  @argv = argv

  @events = events

  @status = nil
  @runner = nil

  @config = nil

  ENV['NEWRELIC_DISPATCHER'] ||= "puma"

  setup_options
  generate_restart_data

  @binder = Binder.new(@events)
  @binder.import_from_env
end

Instance Attribute Details

#binder ⇒ Object (readonly)

The Binder object containing the sockets bound to.



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# File 'lib/puma/cli.rb', line 48

def binder
  @binder
end

#config ⇒ Object (readonly)

The Configuration object used.



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# File 'lib/puma/cli.rb', line 51

def config
  @config
end

#events ⇒ Object (readonly)

The Events object used to output information.



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# File 'lib/puma/cli.rb', line 57

def events
  @events
end

#options ⇒ Object (readonly)

The Hash of options used to configure puma.



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# File 'lib/puma/cli.rb', line 54

def options
  @options
end

Instance Method Details

#clustered? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/puma/cli.rb', line 319

def clustered?
  @options[:workers] > 0
end

#debug(str) ⇒ Object 



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# File 'lib/puma/cli.rb', line 71

def debug(str)
  if @options[:debug]
    @events.log "- #{str}"
  end
end

#delete_pidfile ⇒ Object 



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# File 'lib/puma/cli.rb', line 271

def delete_pidfile
  if path = @options[:pidfile]
    File.unlink path if File.exist? path
  end
end

#env ⇒ Object 



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# File 'lib/puma/cli.rb', line 260

def env
  # Try the user option first, then the environment variable,
  # finally default to development
  @options[:environment] || ENV['RACK_ENV'] || 'development'
end

#error(str) ⇒ Object

Delegate error to @events



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# File 'lib/puma/cli.rb', line 67

def error(str)
  @events.error str
end

#find_config ⇒ Object 



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# File 'lib/puma/cli.rb', line 277

def find_config
  if cfg = @options[:config_file]
    # Allow - to disable config finding
    if cfg == "-"
      @options[:config_file] = nil
      return
    end

    return
  end

  pos = ["config/puma/#{env}.rb", "config/puma.rb"]
  @options[:config_file] = pos.find { |f| File.exist? f }
end

#generate_restart_data ⇒ Object 



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# File 'lib/puma/cli.rb', line 328

def generate_restart_data
  # Use the same trick as unicorn, namely favor PWD because
  # it will contain an unresolved symlink, useful for when
  # the pwd is /data/releases/current.
  if dir = ENV['PWD']
    s_env = File.stat(dir)
    s_pwd = File.stat(Dir.pwd)

    if s_env.ino == s_pwd.ino and s_env.dev == s_pwd.dev
      @restart_dir = dir
      @options[:worker_directory] = dir
    end
  end

  @restart_dir ||= Dir.pwd

  @original_argv = ARGV.dup

  if defined? Rubinius::OS_ARGV
    @restart_argv = Rubinius::OS_ARGV
  else
    require 'rubygems'

    # if $0 is a file in the current directory, then restart
    # it the same, otherwise add -S on there because it was
    # picked up in PATH.
    #
    if File.exist?($0)
      arg0 = [Gem.ruby, $0]
    else
      arg0 = [Gem.ruby, "-S", $0]
    end

    # Detect and reinject -Ilib from the command line
    lib = File.expand_path "lib"
    arg0[1,0] = ["-I", lib] if $:[0] == lib

    @restart_argv = arg0 + ARGV
  end
end

#graceful_stop ⇒ Object 



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# File 'lib/puma/cli.rb', line 323

def graceful_stop
  @runner.stop_blocked
  log "- Goodbye!"
end

#halt ⇒ Object 



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# File 'lib/puma/cli.rb', line 571

def halt
  @status = :halt
  @runner.halt
end

#jruby? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/puma/cli.rb', line 77

def jruby?
  IS_JRUBY
end

#jruby_daemon_start ⇒ Object 



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# File 'lib/puma/cli.rb', line 377

def jruby_daemon_start
  require 'puma/jruby_restart'
  JRubyRestart.daemon_start(@restart_dir, restart_args)
end

#log(str) ⇒ Object

Delegate log to @events



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# File 'lib/puma/cli.rb', line 61

def log(str)
  @events.log str
end

#parse_options ⇒ Object

:nodoc:



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# File 'lib/puma/cli.rb', line 293

def parse_options
  @parser.parse! @argv

  if @argv.last
    @options[:rackup] = @argv.shift
  end

  find_config

  @config = Puma::Configuration.new @options

  # Advertise the Configuration
  Puma.cli_config = @config

  @config.load

  if clustered?
    unsupported "worker mode not supported on JRuby or Windows",
                jruby? || windows?
  end

  if @options[:daemon] and windows?
    unsupported "daemon mode not supported on Windows"
  end
end

#phased_restart ⇒ Object 



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# File 'lib/puma/cli.rb', line 559

def phased_restart
  unless @runner.respond_to?(:phased_restart) and @runner.phased_restart
    log "* phased-restart called but not available, restarting normally."
    return restart
  end
  true
end

#prune_bundler? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/puma/cli.rb', line 437

def prune_bundler?
  @options[:prune_bundler] && clustered? && !@options[:preload_app]
end

#restart ⇒ Object 



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# File 'lib/puma/cli.rb', line 554

def restart
  @status = :restart
  @runner.restart
end

#restart! ⇒ Object 



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# File 'lib/puma/cli.rb', line 382

def restart!
  @options[:on_restart].each do |block|
    block.call self
  end

  if jruby?
    @binder.listeners.each_with_index do |(str,io),i|
      io.close

      # We have to unlink a unix socket path that's not being used
      uri = URI.parse str
      if uri.scheme == "unix"
        path = "#{uri.host}#{uri.path}"
        File.unlink path
      end
    end

    require 'puma/jruby_restart'
    JRubyRestart.chdir_exec(@restart_dir, restart_args)

  elsif windows?
    @binder.listeners.each_with_index do |(str,io),i|
      io.close

      # We have to unlink a unix socket path that's not being used
      uri = URI.parse str
      if uri.scheme == "unix"
        path = "#{uri.host}#{uri.path}"
        File.unlink path
      end
    end

    argv = restart_args

    Dir.chdir @restart_dir

    argv += [redirects] unless RUBY_VERSION < '1.9'
    Kernel.exec(*argv)

  else
    redirects = {:close_others => true}
    @binder.listeners.each_with_index do |(l,io),i|
      ENV["PUMA_INHERIT_#{i}"] = "#{io.to_i}:#{l}"
      redirects[io.to_i] = io.to_i
    end

    argv = restart_args

    Dir.chdir @restart_dir

    argv += [redirects] unless RUBY_VERSION < '1.9'
    Kernel.exec(*argv)
  end
end

#restart_args ⇒ Object 



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# File 'lib/puma/cli.rb', line 369

def restart_args
  if cmd = @options[:restart_cmd]
    cmd.split(' ') + @original_argv
  else
    @restart_argv
  end
end

#run ⇒ Object

Parse the options, load the rackup, start the server and wait for it to finish.



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# File 'lib/puma/cli.rb', line 444

def run
  begin
    parse_options
  rescue UnsupportedOption
    exit 1
  end

  if prune_bundler? && defined?(Bundler)
    puma = Bundler.rubygems.loaded_specs("puma")

    dirs = puma.require_paths.map { |x| File.join(puma.full_gem_path, x) }

    puma_lib_dir = dirs.detect { |x| File.exist? File.join(x, "../bin/puma-wild") }

    deps = puma.runtime_dependencies.map { |d|
      spec = Bundler.rubygems.loaded_specs(d.name)
      "#{d.name}:#{spec.version.to_s}"
    }.join(",")

    if puma_lib_dir
      log "* Pruning Bundler environment"
      Bundler.with_clean_env do

        wild = File.expand_path(File.join(puma_lib_dir, "../bin/puma-wild"))

        args = [Gem.ruby] + dirs.map { |x| ["-I", x] }.flatten +
               [wild, deps] + @original_argv

        Kernel.exec(*args)
      end
    end

    log "! Unable to prune Bundler environment, continuing"
  end

  if dir = @options[:directory]
    Dir.chdir dir
  end

  set_rack_environment

  if clustered?
    @events = PidEvents.new STDOUT, STDERR
    @options[:logger] = @events

    @runner = Cluster.new(self)
  else
    @runner = Single.new(self)
  end

  setup_signals
  set_process_title

  @status = :run

  @runner.run

  case @status
  when :halt
    log "* Stopping immediately!"
  when :run, :stop
    graceful_stop
  when :restart
    log "* Restarting..."
    @runner.before_restart
    restart!
  when :exit
    # nothing
  end
end

#set_rack_environment ⇒ Object 



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# File 'lib/puma/cli.rb', line 266

def set_rack_environment
  @options[:environment] = env
  ENV['RACK_ENV'] = env
end

#setup_options ⇒ Object

Build the OptionParser object to handle the available options.



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# File 'lib/puma/cli.rb', line 93

def setup_options
  @options = {
    :min_threads => 0,
    :max_threads => 16,
    :quiet => false,
    :debug => false,
    :binds => [],
    :workers => 0,
    :daemon => false,
    :before_worker_boot => [],
    :after_worker_boot => []
  }

  @parser = OptionParser.new do |o|
    o.on "-b", "--bind URI", "URI to bind to (tcp://, unix://, ssl://)" do |arg|
      @options[:binds] << arg
    end

    o.on "-C", "--config PATH", "Load PATH as a config file" do |arg|
      @options[:config_file] = arg
    end

    o.on "--control URL", "The bind url to use for the control server",
                          "Use 'auto' to use temp unix server" do |arg|
      if arg
        @options[:control_url] = arg
      elsif jruby?
        unsupported "No default url available on JRuby"
      end
    end

    o.on "--control-token TOKEN",
         "The token to use as authentication for the control server" do |arg|
      @options[:control_auth_token] = arg
    end

    o.on "-d", "--daemon", "Daemonize the server into the background" do
      @options[:daemon] = true
      @options[:quiet] = true
    end

    o.on "--debug", "Log lowlevel debugging information" do
      @options[:debug] = true
    end

    o.on "--dir DIR", "Change to DIR before starting" do |d|
      @options[:directory] = d.to_s
      @options[:worker_directory] = d.to_s
    end

    o.on "-e", "--environment ENVIRONMENT",
         "The environment to run the Rack app on (default development)" do |arg|
      @options[:environment] = arg
    end

    o.on "-I", "--include PATH", "Specify $LOAD_PATH directories" do |arg|
      $LOAD_PATH.unshift(*arg.split(':'))
    end

    o.on "-p", "--port PORT", "Define the TCP port to bind to",
                              "Use -b for more advanced options" do |arg|
      @options[:binds] << "tcp://#{Configuration::DefaultTCPHost}:#{arg}"
    end

    o.on "--pidfile PATH", "Use PATH as a pidfile" do |arg|
      @options[:pidfile] = arg
    end

    o.on "--preload", "Preload the app. Cluster mode only" do
      @options[:preload_app] = true
    end

    o.on "--prune-bundler", "Prune out the bundler env if possible" do
      @options[:prune_bundler] = true
    end

    o.on "-q", "--quiet", "Quiet down the output" do
      @options[:quiet] = true
    end

    o.on "-R", "--restart-cmd CMD",
         "The puma command to run during a hot restart",
         "Default: inferred" do |cmd|
      @options[:restart_cmd] = cmd
    end

    o.on "-S", "--state PATH", "Where to store the state details" do |arg|
      @options[:state] = arg
    end

    o.on '-t', '--threads INT', "min:max threads to use (default 0:16)" do |arg|
      min, max = arg.split(":")
      if max
        @options[:min_threads] = min
        @options[:max_threads] = max
      else
        @options[:min_threads] = 0
        @options[:max_threads] = arg
      end
    end

    o.on "--tcp-mode", "Run the app in raw TCP mode instead of HTTP mode" do
      @options[:mode] = :tcp
    end

    o.on "-V", "--version", "Print the version information" do
      puts "puma version #{Puma::Const::VERSION}"
      exit 1
    end

    o.on "-w", "--workers COUNT",
               "Activate cluster mode: How many worker processes to create" do |arg|
      @options[:workers] = arg.to_i
    end

    o.on "--tag NAME", "Additional text to display in process listing" do |arg|
      @options[:tag] = arg
    end
  end

  @parser.banner = "puma <options> <rackup file>"

  @parser.on_tail "-h", "--help", "Show help" do
    log @parser
    exit 1
  end
end

#setup_signals ⇒ Object 



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# File 'lib/puma/cli.rb', line 515

def setup_signals
  begin
    Signal.trap "SIGUSR2" do
      restart
    end
  rescue Exception
    log "*** SIGUSR2 not implemented, signal based restart unavailable!"
  end

  begin
    Signal.trap "SIGUSR1" do
      phased_restart
    end
  rescue Exception
    log "*** SIGUSR1 not implemented, signal based restart unavailable!"
  end

  begin
    Signal.trap "SIGTERM" do
      stop
    end
  rescue Exception
    log "*** SIGTERM not implemented, signal based gracefully stopping unavailable!"
  end

  if jruby?
    Signal.trap("INT") do
      @status = :exit
      graceful_stop
      exit
    end
  end
end

#stats ⇒ Object 



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# File 'lib/puma/cli.rb', line 567

def stats
  @runner.stats
end

#stop ⇒ Object 



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# File 'lib/puma/cli.rb', line 549

def stop
  @status = :stop
  @runner.stop
end

#unsupported(str, cond = true) ⇒ Object

Raises:



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# File 'lib/puma/cli.rb', line 85

def unsupported(str, cond=true)
  return unless cond
  @events.error str
  raise UnsupportedOption
end

#windows? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/puma/cli.rb', line 81

def windows?
  RUBY_PLATFORM =~ /mswin32|ming32/
end

#write_pid ⇒ Object

If configured, write the pid of the current process out to a file.



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# File 'lib/puma/cli.rb', line 244

def write_pid
  if path = @options[:pidfile]
    File.open(path, "w") do |f|
      f.puts Process.pid
    end

    cur = Process.pid

    at_exit do
      if cur == Process.pid
        delete_pidfile
      end
    end
  end
end

#write_state ⇒ Object 



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# File 'lib/puma/cli.rb', line 221

def write_state
  write_pid

  require 'yaml'

  if path = @options[:state]
    state = { "pid" => Process.pid }

    cfg = @config.dup

    [ :logger, :before_worker_boot, :after_worker_boot, :on_restart ].each { |o| cfg.options.delete o }

    state["config"] = cfg

    File.open(path, "w") do |f|
      f.write state.to_yaml
    end
  end
end