Postponing the Bundler merge.

I faced a big issue about Bundler with ruby core.
  I have no time to resolve it issue before 2.5 final release.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61416 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/bundler/worker.rb

@@ -1,106 +0,0 @@
-# frozen_string_literal: true
-
-require "thread"
-
-module Bundler
-  class Worker
-    POISON = Object.new
-
-    class WrappedException < StandardError
-      attr_reader :exception
-      def initialize(exn)
-        @exception = exn
-      end
-    end
-
-    # @return [String] the name of the worker
-    attr_reader :name
-
-    # Creates a worker pool of specified size
-    #
-    # @param size [Integer] Size of pool
-    # @param name [String] name the name of the worker
-    # @param func [Proc] job to run in inside the worker pool
-    def initialize(size, name, func)
-      @name = name
-      @request_queue = Queue.new
-      @response_queue = Queue.new
-      @func = func
-      @size = size
-      @threads = nil
-      SharedHelpers.trap("INT") { abort_threads }
-    end
-
-    # Enqueue a request to be executed in the worker pool
-    #
-    # @param obj [String] mostly it is name of spec that should be downloaded
-    def enq(obj)
-      create_threads unless @threads
-      @request_queue.enq obj
-    end
-
-    # Retrieves results of job function being executed in worker pool
-    def deq
-      result = @response_queue.deq
-      raise result.exception if result.is_a?(WrappedException)
-      result
-    end
-
-    def stop
-      stop_threads
-    end
-
-  private
-
-    def process_queue(i)
-      loop do
-        obj = @request_queue.deq
-        break if obj.equal? POISON
-        @response_queue.enq apply_func(obj, i)
-      end
-    end
-
-    def apply_func(obj, i)
-      @func.call(obj, i)
-    rescue Exception => e
-      WrappedException.new(e)
-    end
-
-    # Stop the worker threads by sending a poison object down the request queue
-    # so as worker threads after retrieving it, shut themselves down
-    def stop_threads
-      return unless @threads
-      @threads.each { @request_queue.enq POISON }
-      @threads.each(&:join)
-      @threads = nil
-    end
-
-    def abort_threads
-      return unless @threads
-      Bundler.ui.debug("\n#{caller.join("\n")}")
-      @threads.each(&:exit)
-      exit 1
-    end
-
-    def create_threads
-      creation_errors = []
-
-      @threads = Array.new(@size) do |i|
-        begin
-          Thread.start { process_queue(i) }.tap do |thread|
-            thread.name = "#{name} Worker ##{i}" if thread.respond_to?(:name=)
-          end
-        rescue ThreadError => e
-          creation_errors << e
-          nil
-        end
-      end.compact
-
-      return if creation_errors.empty?
-
-      message = "Failed to create threads for the #{name} worker: #{creation_errors.map(&:to_s).uniq.join(", ")}"
-      raise ThreadCreationError, message if @threads.empty?
-      Bundler.ui.info message
-    end
-  end
-end