Module: NNQ::CLI

Defined in:
lib/nnq/cli.rb,
lib/nnq/cli/bus.rb,
lib/nnq/cli/pair.rb,
lib/nnq/cli/pipe.rb,
lib/nnq/cli/term.rb,
lib/nnq/cli/config.rb,
lib/nnq/cli/pub_sub.rb,
lib/nnq/cli/req_rep.rb,
lib/nnq/cli/version.rb,
lib/nnq/cli/formatter.rb,
lib/nnq/cli/push_pull.rb,
lib/nnq/cli/cli_parser.rb,
lib/nnq/cli/base_runner.rb,
lib/nnq/cli/pipe_worker.rb,
lib/nnq/cli/socket_setup.rb,
lib/nnq/cli/ractor_helpers.rb,
lib/nnq/cli/transient_monitor.rb,
lib/nnq/cli/surveyor_respondent.rb,
lib/nnq/cli/expression_evaluator.rb

Overview

Command-line interface for NNQ socket operations.

Defined Under Namespace

Modules: RactorHelpers, SocketSetup, Term Classes: BaseRunner, BusRunner, CliParser, Config, DecompressError, Endpoint, ExpressionEvaluator, Formatter, PairRunner, PipeRunner, PipeWorker, PubRunner, PullRunner, PushRunner, RepRunner, ReqRunner, RespondentRunner, SubRunner, SurveyorRunner, TransientMonitor

Constant Summary collapse

SOCKET_TYPE_NAMES = 
%w[req rep pub sub push pull pair bus surveyor respondent pipe].freeze
RUNNER_MAP = 
{
  "push"       => [PushRunner,       :PUSH0],
  "pull"       => [PullRunner,       :PULL0],
  "pub"        => [PubRunner,        :PUB0],
  "sub"        => [SubRunner,        :SUB0],
  "req"        => [ReqRunner,        :REQ0],
  "rep"        => [RepRunner,        :REP0],
  "pair"       => [PairRunner,       :PAIR0],
  "bus"        => [BusRunner,        :BUS0],
  "surveyor"   => [SurveyorRunner,   :SURVEYOR0],
  "respondent" => [RespondentRunner, :RESPONDENT0],
  "pipe"       => [PipeRunner,       nil],
}.freeze
SEND_ONLY =

Socket type names that only send messages.

%w[pub push].freeze
RECV_ONLY =

Socket type names that only receive messages.

%w[sub pull].freeze
VERSION = 
"0.2.0"

Class Method Summary collapse

Class Method Details

.build_config(argv) ⇒ Object

Builds a frozen Config from command-line arguments.



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# File 'lib/nnq/cli.rb', line 181

def build_config(argv)
  opts = CliParser.parse(argv)
  CliParser.validate!(opts)

  opts[:stdin_is_tty] = $stdin.tty?

  Ractor.make_shareable(Config.new(**opts))
end

.page(text) ⇒ Object

Displays text through the system pager, or prints directly when stdout is not a terminal.



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

def page(text)
  if $stdout.tty?
    if ENV["PAGER"]
      pager = ENV["PAGER"]
    else
      ENV["LESS"] ||= "-FR"
      pager = "less"
    end
    IO.popen(pager, "w") { |io| io.puts text }
  else
    puts text
  end
rescue Errno::ENOENT
  puts text
rescue Errno::EPIPE
  # user quit pager early
end

.run(argv = ARGV) ⇒ void

This method returns an undefined value.

Main entry point.

Parameters:

  • argv (Array<String>) (defaults to: ARGV) —

    command-line arguments



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# File 'lib/nnq/cli.rb', line 94

def run(argv = ARGV)
  run_socket(argv)
end

.run_socket(argv) ⇒ Object

Parses CLI arguments, validates options, and runs the main event loop inside an Async reactor.



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# File 'lib/nnq/cli.rb', line 102

def run_socket(argv)
  config = build_config(argv)

  require "nnq"
  require "async"
  require "json"
  require "console"

  CliParser.validate_gems!(config)
  trap("INT")  { Process.exit!(0) }
  trap("TERM") { Process.exit!(0) }

  Console.logger = Console::Logger.new(Console::Output::Null.new) unless config.verbose >= 1

  debug_ep = nil

  if ENV["NNQ_DEBUG_URI"]
    begin
      require "async/debug"
      debug_ep = Async::HTTP::Endpoint.parse(ENV["NNQ_DEBUG_URI"])
      if debug_ep.scheme == "https"
        require "localhost"
        debug_ep = Async::HTTP::Endpoint.parse(ENV["NNQ_DEBUG_URI"],
          ssl_context: Localhost::Authority.fetch.server_context)
      end
    rescue LoadError
      abort "NNQ_DEBUG_URI requires the async-debug gem: gem install async-debug"
    end
  end

  if config.type_name.nil?
    Process.setproctitle("nnq script")
    Object.include(NNQ) unless Object.include?(NNQ)
    Async annotation: 'nnq' do
      Async::Debug.serve(endpoint: debug_ep) if debug_ep
      config.scripts.each { |s| load_script(s) }
    rescue => e
      $stderr.puts "nnq: #{e.message}"
      exit 1
    end
    return
  end

  runner_class, socket_sym = RUNNER_MAP.fetch(config.type_name)

  Async annotation: "nnq #{config.type_name}" do |task|
    Async::Debug.serve(endpoint: debug_ep) if debug_ep
    config.scripts.each { |s| load_script(s) }
    runner = if socket_sym
               runner_class.new(config, NNQ.const_get(socket_sym))
             else
               runner_class.new(config)
             end
    runner.call(task)
  rescue DecompressError => e
    $stderr.puts "nnq: #{e.message}"
    exit 1
  rescue IO::TimeoutError, Async::TimeoutError
    $stderr.puts "nnq: timeout" unless config.quiet
    exit 2
  rescue ::Socket::ResolutionError => e
    $stderr.puts "nnq: #{e.message}"
    exit 1
  end
end