OS X 10.6.5 + Spork 0.8.4 + RSpec 1.3.1 = DRb.start_service('druby://localhost:0') SocketError

drb_command_line.rb

require "drb/drb"

module Spec
  module Runner
    # Facade to run specs by connecting to a DRB server
    class DrbCommandLine

      def self.port(options)
        (options.drb_port || ENV["RSPEC_DRB"] || 8989).to_i
      end

      # Runs specs on a DRB server. Note that this API is similar to that of
      # CommandLine - making it possible for clients to use both interchangeably.
      def self.run(options)
        begin
          begin; \
            # Workaround http://www.ruby-forum.com/topic/154556
            DRb.start_service("druby://127.0.0.1:0"); \
          rescue SocketError, Errno::EADDRNOTAVAIL; \
            DRb.start_service("druby://:0"); \
          end
          spec_server = DRbObject.new_with_uri("druby://127.0.0.1:#{port(options)}")
          spec_server.run(options.argv, options.error_stream, options.output_stream)
          true
        rescue DRb::DRbConnError
          options.error_stream.puts "No server is running"
          false
        end
      end

    end
  end
end