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File Manager

Path: /opt/chef.upgrade/embedded/lib/ruby/gems/2.3.0/gems/byebug-9.0.6/lib/byebug/

Viewing File: remote.rb

require 'socket'
require 'byebug/processors/control_processor'

#
# Remote debugging functionality.
#
# @todo Refactor & add tests
#
module Byebug
  # Port number used for remote debugging
  PORT = 8989 unless defined?(PORT)

  class << self
    # If in remote mode, wait for the remote connection
    attr_accessor :wait_connection

    # The actual port that the server is started at
    attr_accessor :actual_port
    attr_reader :actual_control_port

    #
    # Interrupts the current thread
    #
    def interrupt
      current_context.interrupt
    end

    #
    # Starts a remote byebug
    #
    def start_server(host = nil, port = PORT)
      return if @thread

      Context.interface = nil
      start

      start_control(host, port.zero? ? 0 : port + 1)

      mutex = Mutex.new
      proceed = ConditionVariable.new

      server = TCPServer.new(host, port)
      self.actual_port = server.addr[1]

      yield if block_given?

      @thread = DebugThread.new do
        while (session = server.accept)
          Context.interface = RemoteInterface.new(session)
          mutex.synchronize { proceed.signal } if wait_connection
        end
      end

      mutex.synchronize { proceed.wait(mutex) } if wait_connection
    end

    def start_control(host = nil, ctrl_port = PORT + 1)
      return @actual_control_port if @control_thread
      server = TCPServer.new(host, ctrl_port)
      @actual_control_port = server.addr[1]

      @control_thread = DebugThread.new do
        while (session = server.accept)
          Context.interface = RemoteInterface.new(session)

          ControlProcessor.new(Byebug.current_context).process_commands
        end
      end

      @actual_control_port
    end

    #
    # Connects to the remote byebug
    #
    def start_client(host = 'localhost', port = PORT)
      interface = LocalInterface.new
      puts 'Connecting to byebug server...'
      socket = TCPSocket.new(host, port)
      puts 'Connected.'

      while (line = socket.gets)
        case line
        when /^PROMPT (.*)$/
          input = interface.read_command(Regexp.last_match[1])
          break unless input
          socket.puts input
        when /^CONFIRM (.*)$/
          input = interface.readline(Regexp.last_match[1])
          break unless input
          socket.puts input
        else
          puts line
        end
      end

      socket.close
    end

    def parse_host_and_port(host_port_spec)
      location = host_port_spec.split(':')
      location[1] ? [location[0], location[1].to_i] : ['localhost', location[0]]
    end
  end
end