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.

Constant Summary collapse

DefaultTCPHost = 
"0.0.0.0"
DefaultTCPPort = 
9292
IS_JRUBY = 
defined?(JRUBY_VERSION)

Instance Method Summary collapse

Constructor Details

#initialize(argv, stdout = STDOUT, stderr = STDERR) ⇒ 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 24

def initialize(argv, stdout=STDOUT, stderr=STDERR)
  @argv = argv
  @stdout = stdout
  @stderr = stderr

  @events = Events.new @stdout, @stderr

  @server = nil
  @status = nil

  @restart = false
  @temp_status_path = nil

  setup_options

  generate_restart_data
end

Instance Method Details

#error(str) ⇒ Object

Write str to @stderr



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# File 'lib/puma/cli.rb', line 96

def error(str)
  @stderr.puts "ERROR: #{str}"
  exit 1
end

#generate_restart_data ⇒ Object 



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

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
    end
  end

  @restart_dir ||= Dir.pwd

  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.exists?($0)
      @restart_argv = [Gem.ruby, $0] + ARGV
    else
      @restart_argv = [Gem.ruby, "-S", $0] + ARGV
    end
  end
end

#load_rackup ⇒ Object

Load the specified rackup file, pull an options from the rackup file, and set @app.



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# File 'lib/puma/cli.rb', line 170

def load_rackup
  @app, options = Rack::Builder.parse_file @rackup
  @options.merge! options

  options.each do |key,val|
    if key.to_s[0,4] == "bind"
      @binds << val
    end
  end
end

#log(str) ⇒ Object

Write str to @stdout



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# File 'lib/puma/cli.rb', line 90

def log(str)
  @stdout.puts str
end

#parse_options ⇒ Object

:nodoc:



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# File 'lib/puma/cli.rb', line 209

def parse_options
  @parser.parse! @argv
end

#restart! ⇒ Object 



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# File 'lib/puma/cli.rb', line 83

def restart!
  Dir.chdir @restart_dir
  Kernel.exec(*@restart_argv)
end

#restart_on_stop! ⇒ Object 



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# File 'lib/puma/cli.rb', line 42

def restart_on_stop!
  if @restart_argv
    @restart = true
    return true
  else
    return false
  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 216

def run
  parse_options

  @rackup = @argv.shift || "config.ru"

  unless File.exists?(@rackup)
    raise "Missing rackup file '#{@rackup}'"
  end

  load_rackup
  write_pid
  write_state

  unless @options[:quiet]
    @app = Rack::CommonLogger.new(@app, STDOUT)
  end

  if @binds.empty?
    @options[:Host] ||= DefaultTCPHost
    @options[:Port] ||= DefaultTCPPort
  end

  min_t = @options[:min_threads]
  max_t = @options[:max_threads]

  server = Puma::Server.new @app, @events
  server.min_threads = min_t
  server.max_threads = max_t

  log "Puma #{Puma::Const::PUMA_VERSION} starting..."
  log "* Min threads: #{min_t}, max threads: #{max_t}"

  if @options[:Host]
    log "* Listening on tcp://#{@options[:Host]}:#{@options[:Port]}"
    server.add_tcp_listener @options[:Host], @options[:Port]
  end

  @binds.each do |str|
    uri = URI.parse str
    case uri.scheme
    when "tcp"
      log "* Listening on #{str}"
      server.add_tcp_listener uri.host, uri.port
    when "unix"
      log "* Listening on #{str}"
      path = "#{uri.host}#{uri.path}"

      server.add_unix_listener path
    else
      error "Invalid URI: #{str}"
    end
  end

  @server = server

  if str = @options[:status_address]
    require 'puma/app/status'

    uri = URI.parse str

    app = Puma::App::Status.new server, self
    status = Puma::Server.new app, @events
    status.min_threads = 0
    status.max_threads = 1

    case uri.scheme
    when "tcp"
      log "* Starting status server on #{str}"
      status.add_tcp_listener uri.host, uri.port
    when "unix"
      log "* Starting status server on #{str}"
      path = "#{uri.host}#{uri.path}"

      status.add_unix_listener path
    else
      error "Invalid status URI: #{str}"
    end

    status.run
    @status = status
  end

  log "Use Ctrl-C to stop"

  begin
    server.run.join
  rescue Interrupt
    log " - Gracefully stopping, waiting for requests to finish"
    server.stop(true)
    log " - Goodbye!"
  end

  File.unlink @temp_status_path if @temp_status_path

  if @restart
    log "* Restarting..."
    restart!
  end
end

#setup_options ⇒ Object

Build the OptionParser object to handle the available options.



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# File 'lib/puma/cli.rb', line 103

def setup_options
  @options = {
    :min_threads => 0,
    :max_threads => 16,
    :quiet => false
  }

  @binds = []

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

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

    o.on "-q", "--quiet", "Quiet down the output" do
      @options[:quiet] = true
    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.to_i
        @options[:max_threads] = max.to_i
      else
        @options[:min_threads] = 0
        @options[:max_threads] = arg.to_i
      end
    end

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

    o.on "--status [URL]", "The bind url to use for the status server" do |arg|
      if arg and arg != "@"
        @options[:status_address] = arg
      elsif IS_JRUBY
        raise NotImplementedError, "No default url available on JRuby"
      else
        require 'tmpdir'

        t = (Time.now.to_f * 1000).to_i
        path = "#{Dir.tmpdir}/puma-status-#{t}-#{$$}"

        @temp_status_path = path

        @options[:status_address] = "unix://#{path}"
      end
    end

  end

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

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

#stop ⇒ Object 



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# File 'lib/puma/cli.rb', line 316

def stop
  @server.stop(true) if @server
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 184

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

#write_state ⇒ Object 



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# File 'lib/puma/cli.rb', line 192

def write_state
  require 'yaml'

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

    if url = @options[:status_address]
      state["status_address"] = url
    end

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