Render go-import meta tag for private repos.

app/controllers/projects_controller.rb

 class ProjectsController < ApplicationController
+  prepend_before_filter :render_go_import, only: [:show]
   skip_before_filter :authenticate_user!, only: [:show]
   before_filter :project, except: [:new, :create]
   before_filter :repository, except: [:new, :create]
@@ -184,4 +185,14 @@ class ProjectsController < ApplicationController
       end
     end
   end
+
+  def render_go_import
+    return unless params["go-get"] == "1"
+
+    @namespace = params[:namespace_id]
+    @id = params[:project_id] || params[:id]
+    @id = @id.gsub(/\.git\Z/, "")
+
+    render "go_import", layout: false
+  end
 end

app/views/layouts/_head.html.haml

 %head
   %meta{charset: "utf-8"}
-
-  -# Go repository retrieval support
-  -# Need to be the fist thing in the head
-  -# Since Go is using an XML parser to process HTML5
-  -# https://github.com/gitlabhq/gitlabhq/pull/5958#issuecomment-45397555
-  - if controller_name == 'projects' && action_name == 'show'
-    %meta{name: "go-import", content: "#{@project.web_url_without_protocol} git #{@project.web_url}.git"}
   %meta{content: "GitLab Community Edition", name: "description"}
 
   %title

app/views/projects/go_import.html.haml

+!!! 5
+%html
+  %head
+    - web_url = [Gitlab.config.gitlab.url, @namespace, @id].join('/')
+    %meta{name: "go-import", content: "#{web_url.split('://')[1]} git #{web_url}.git"}

spec/controllers/projects_controller_spec.rb

@@ -7,6 +7,22 @@ describe ProjectsController do
   let(:jpg)     { fixture_file_upload(Rails.root + 'spec/fixtures/rails_sample.jpg', 'image/jpg') }
   let(:txt)     { fixture_file_upload(Rails.root + 'spec/fixtures/doc_sample.txt', 'text/plain') }
 
+  describe "GET show" do
+
+    context "when requested by `go get`" do
+      render_views
+
+      it "renders the go-import meta tag" do
+        get :show, "go-get" => "1", namespace_id: "bogus_namespace", id: "bogus_project"
+
+        expect(response.body).to include("name='go-import'")
+        
+        content = "localhost/bogus_namespace/bogus_project git http://localhost/bogus_namespace/bogus_project.git"
+        expect(response.body).to include("content='#{content}'")
+      end
+    end
+  end
+  
   describe "POST #toggle_star" do
     it "toggles star if user is signed in" do
       sign_in(user)