Merge branch 'fix/ruby-2.2-webrick' into 'master'

workaround for webrick issue on ruby 2.2

Workaround that fixes https://gitlab.com/gitlab-org/gitlab-shell/issues/36

See merge request !38

.gitlab-ci.yml

+image: "ruby:2.2"
+
 before_script:
   - export PATH=~/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
   - apt-get update
@@ -6,6 +8,7 @@ before_script:
   - cp config.yml.example config.yml
   - bundle install
 
+#ruby 2.2
 rspec:
   script:
     - bundle exec rspec spec
@@ -21,3 +24,22 @@ rubocop:
     - ruby
   except:
     - tags
+
+#ruby 2.1
+rspec:ruby2.1:
+  image: ruby:2.1
+  script:
+    - bundle exec rspec spec
+  tags:
+    - ruby
+  except:
+    - tags
+
+rubocop:ruby2.1:
+  image: ruby:2.1
+  script:
+    - bundle exec rubocop
+  tags:
+    - ruby
+  except:
+    - tags

spec/httpunix_spec.rb

@@ -24,6 +24,23 @@ class HTTPUNIXServer < WEBrick::HTTPServer
     socket.close
     @listeners << server
   end
+
+  # Workaround:
+  # https://bugs.ruby-lang.org/issues/10956
+  # Affecting Ruby 2.2
+  # Fix for 2.2 is at https://github.com/ruby/ruby/commit/ab0a64e1
+  # However, this doesn't work with 2.1. The following should work for both:
+  def start(&block)
+    @shutdown_pipe = IO.pipe
+    shutdown_pipe = @shutdown_pipe
+    super(&block)
+  end
+
+  def cleanup_shutdown_pipe(shutdown_pipe)
+    @shutdown_pipe = nil
+    return if !shutdown_pipe
+    super(shutdown_pipe)
+  end
 end
 
 def tmp_socket_path