Update bundled bundler to 1.16.0.

* lib/bundler, spec/bundler: Merge bundler-1.16.0.
  * common.mk: rspec examples of bundler-1.16.0 needs require option.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60603 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/bundler/installer/gem_installer.rb

@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module Bundler
   class GemInstaller
     attr_reader :spec, :standalone, :worker, :force, :installer
@@ -65,6 +66,7 @@ module Bundler
     end
 
     def generate_executable_stubs
+      return if Bundler.feature_flag.forget_cli_options?
       return if Bundler.settings[:inline]
       if Bundler.settings[:bin] && standalone
         installer.generate_standalone_bundler_executable_stubs(spec)

lib/bundler/installer/parallel_installer.rb

@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require "bundler/worker"
 require "bundler/installer/gem_installer"
 
@@ -77,11 +78,6 @@ module Bundler
       new(*args).call
     end
 
-    # Returns max number of threads machine can handle with a min of 1
-    def self.max_threads
-      [Bundler.settings[:jobs].to_i - 1, 1].max
-    end
-
     attr_reader :size
 
     def initialize(installer, all_specs, size, standalone, force)
@@ -99,49 +95,19 @@ module Bundler
       require "bundler/gem_remote_fetcher" if RUBY_VERSION < "1.9"
 
       check_for_corrupt_lockfile
-      enqueue_specs
-      process_specs until @specs.all?(&:installed?) || @specs.any?(&:failed?)
+
+      if @size > 1
+        install_with_worker
+      else
+        install_serially
+      end
+
       handle_error if @specs.any?(&:failed?)
       @specs
     ensure
       worker_pool && worker_pool.stop
     end
 
-    def worker_pool
-      @worker_pool ||= Bundler::Worker.new @size, "Parallel Installer", lambda { |spec_install, worker_num|
-        gem_installer = Bundler::GemInstaller.new(
-          spec_install.spec, @installer, @standalone, worker_num, @force
-        )
-        success, message = gem_installer.install_from_spec
-        if success && !message.nil?
-          spec_install.post_install_message = message
-        elsif !success
-          spec_install.state = :failed
-          spec_install.error = "#{message}\n\n#{require_tree_for_spec(spec_install.spec)}"
-        end
-        spec_install
-      }
-    end
-
-    # Dequeue a spec and save its post-install message and then enqueue the
-    # remaining specs.
-    # Some specs might've had to wait til this spec was installed to be
-    # processed so the call to `enqueue_specs` is important after every
-    # dequeue.
-    def process_specs
-      spec = worker_pool.deq
-      spec.state = :installed unless spec.failed?
-      enqueue_specs
-    end
-
-    def handle_error
-      errors = @specs.select(&:failed?).map(&:error)
-      if exception = errors.find {|e| e.is_a?(Bundler::BundlerError) }
-        raise exception
-      end
-      raise Bundler::InstallError, errors.map(&:to_s).join("\n\n")
-    end
-
     def check_for_corrupt_lockfile
       missing_dependencies = @specs.map do |s|
         [
@@ -167,6 +133,71 @@ module Bundler
       Bundler.ui.warn(warning.join("\n"))
     end
 
+  private
+
+    def install_with_worker
+      enqueue_specs
+      process_specs until finished_installing?
+    end
+
+    def install_serially
+      until finished_installing?
+        raise "failed to find a spec to enqueue while installing serially" unless spec_install = @specs.find(&:ready_to_enqueue?)
+        spec_install.state = :enqueued
+        do_install(spec_install, 0)
+      end
+    end
+
+    def worker_pool
+      @worker_pool ||= Bundler::Worker.new @size, "Parallel Installer", lambda { |spec_install, worker_num|
+        do_install(spec_install, worker_num)
+      }
+    end
+
+    def do_install(spec_install, worker_num)
+      gem_installer = Bundler::GemInstaller.new(
+        spec_install.spec, @installer, @standalone, worker_num, @force
+      )
+      success, message = begin
+        gem_installer.install_from_spec
+      rescue => e
+        raise e, "#{e}\n\n#{require_tree_for_spec(spec_install.spec)}"
+      end
+      if success
+        spec_install.state = :installed
+        spec_install.post_install_message = message unless message.nil?
+      else
+        spec_install.state = :failed
+        spec_install.error = "#{message}\n\n#{require_tree_for_spec(spec_install.spec)}"
+      end
+      spec_install
+    end
+
+    # Dequeue a spec and save its post-install message and then enqueue the
+    # remaining specs.
+    # Some specs might've had to wait til this spec was installed to be
+    # processed so the call to `enqueue_specs` is important after every
+    # dequeue.
+    def process_specs
+      worker_pool.deq
+      enqueue_specs
+    end
+
+    def finished_installing?
+      @specs.all? do |spec|
+        return true if spec.failed?
+        spec.installed?
+      end
+    end
+
+    def handle_error
+      errors = @specs.select(&:failed?).map(&:error)
+      if exception = errors.find {|e| e.is_a?(Bundler::BundlerError) }
+        raise exception
+      end
+      raise Bundler::InstallError, errors.map(&:to_s).join("\n\n")
+    end
+
     def require_tree_for_spec(spec)
       tree = @spec_set.what_required(spec)
       t = String.new("In #{File.basename(SharedHelpers.default_gemfile)}:\n")

lib/bundler/installer/standalone.rb

@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module Bundler
   class Standalone
     def initialize(groups, definition)