Merge branch 'fix-wiki-clone-over-http' into 'master'

Fix cloning Wiki repositories via HTTP

Cloning a project Wiki over HTTP would end up cloning the main repository
since the .wiki extension was being stripped.

Closes #3106

See merge request !1676

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.2.0 (unreleased)
+  - Fix cloning Wiki repositories via HTTP (Stan Hu)
   - Improved performance of replacing references in comments
   - Show last project commit to default branch on project home page
   - Highlight comment based on anchor in URL

lib/gitlab/backend/grack_auth.rb

@@ -193,12 +193,19 @@ module Grack
     end
 
     def render_grack_auth_ok
+      repo_path =
+        if @request.path_info =~ /^([\w\.\/-]+)\.wiki\.git/
+          ProjectWiki.new(project).repository.path_to_repo
+        else
+          project.repository.path_to_repo
+        end
+
       [
         200,
         { "Content-Type" => "application/json" },
         [JSON.dump({
           'GL_ID' => Gitlab::ShellEnv.gl_id(@user),
-          'RepoPath' => project.repository.path_to_repo,
+          'RepoPath' => repo_path,
         })]
       ]
     end

spec/lib/gitlab/backend/grack_auth_spec.rb

@@ -50,6 +50,22 @@ describe Grack::Auth do
       end
     end
 
+    context "when the Wiki for a project exists" do
+      before do
+        @wiki = ProjectWiki.new(project)
+        env["PATH_INFO"] = "#{@wiki.repository.path_with_namespace}.git/info/refs"
+        project.update_attribute(:visibility_level, Project::PUBLIC)
+      end
+
+      it "responds with the right project" do
+        response = auth.call(env)
+        json_body = ActiveSupport::JSON.decode(response[2][0])
+
+        expect(response.first).to eq(200)
+        expect(json_body['RepoPath']).to include(@wiki.repository.path_with_namespace)
+      end
+    end
+
     context "when the project exists" do
       before do
         env["PATH_INFO"] = project.path_with_namespace + ".git"