Migrate Gitlab::Git::Wiki#delete_page to Gitaly

Closes gitaly#673

GITALY_SERVER_VERSION

-0.50.0
+0.51.0

Gemfile

@@ -398,7 +398,7 @@ group :ed25519 do
 end
 
 # Gitaly GRPC client
-gem 'gitaly-proto', '~> 0.48.0', require: 'gitaly'
+gem 'gitaly-proto', '~> 0.51.0', require: 'gitaly'
 
 gem 'toml-rb', '~> 0.3.15', require: false
 

Gemfile.lock

@@ -273,7 +273,7 @@ GEM
       po_to_json (>= 1.0.0)
       rails (>= 3.2.0)
     gherkin-ruby (0.3.2)
-    gitaly-proto (0.48.0)
+    gitaly-proto (0.51.0)
       google-protobuf (~> 3.1)
       grpc (~> 1.0)
     github-linguist (4.7.6)
@@ -1030,7 +1030,7 @@ DEPENDENCIES
   gettext (~> 3.2.2)
   gettext_i18n_rails (~> 1.8.0)
   gettext_i18n_rails_js (~> 1.2.0)
-  gitaly-proto (~> 0.48.0)
+  gitaly-proto (~> 0.51.0)
   github-linguist (~> 4.7.0)
   gitlab-flowdock-git-hook (~> 1.0.1)
   gitlab-markup (~> 1.6.2)

lib/gitlab/git/wiki.rb

@@ -35,10 +35,14 @@ module Gitlab
       end
 
       def delete_page(page_path, commit_details)
-        assert_type!(commit_details, CommitDetails)
-
-        gollum_wiki.delete_page(gollum_page_by_path(page_path), commit_details.to_h)
-        nil
+        @repository.gitaly_migrate(:wiki_delete_page) do |is_enabled|
+          if is_enabled
+            gitaly_delete_page(page_path, commit_details)
+            gollum_wiki.clear_cache
+          else
+            gollum_delete_page(page_path, commit_details)
+          end
+        end
       end
 
       def update_page(page_path, title, format, content, commit_details)
@@ -135,9 +139,20 @@ module Gitlab
         raise Gitlab::Git::Wiki::DuplicatePageError, e.message
       end
 
+      def gollum_delete_page(page_path, commit_details)
+        assert_type!(commit_details, CommitDetails)
+
+        gollum_wiki.delete_page(gollum_page_by_path(page_path), commit_details.to_h)
+        nil
+      end
+
       def gitaly_write_page(name, format, content, commit_details)
         gitaly_wiki_client.write_page(name, format, content, commit_details)
       end
+
+      def gitaly_delete_page(page_path, commit_details)
+        gitaly_wiki_client.delete_page(page_path, commit_details)
+      end
     end
   end
 end

lib/gitlab/gitaly_client/wiki_service.rb

@@ -15,11 +15,7 @@ module Gitlab
           repository: @gitaly_repo,
           name: GitalyClient.encode(name),
           format: format.to_s,
-          commit_details: Gitaly::WikiCommitDetails.new(
-            name: GitalyClient.encode(commit_details.name),
-            email: GitalyClient.encode(commit_details.email),
-            message: GitalyClient.encode(commit_details.message)
-          )
+          commit_details: gitaly_commit_details(commit_details)
         )
 
         strio = StringIO.new(content)
@@ -40,6 +36,26 @@ module Gitlab
           raise Gitlab::Git::Wiki::DuplicatePageError, error
         end
       end
+
+      def delete_page(page_path, commit_details)
+        request = Gitaly::WikiDeletePageRequest.new(
+          repository: @gitaly_repo,
+          page_path: GitalyClient.encode(page_path),
+          commit_details: gitaly_commit_details(commit_details)
+        )
+
+        GitalyClient.call(@repository.storage, :wiki_service, :wiki_delete_page, request)
+      end
+
+      private
+
+      def gitaly_commit_details(commit_details)
+        Gitaly::WikiCommitDetails.new(
+          name: GitalyClient.encode(commit_details.name),
+          email: GitalyClient.encode(commit_details.email),
+          message: GitalyClient.encode(commit_details.message)
+        )
+      end
     end
   end
 end

spec/models/project_wiki_spec.rb

@@ -265,6 +265,7 @@ describe ProjectWiki do
   end
 
   describe "#delete_page" do
+    shared_examples 'deleting a wiki page' do
       before do
         create_page("index", "some content")
         @page = subject.wiki.page(title: "index")
@@ -285,6 +286,15 @@ describe ProjectWiki do
       end
     end
 
+    context 'when Gitaly wiki_delete_page is enabled' do
+      it_behaves_like 'deleting a wiki page'
+    end
+
+    context 'when Gitaly wiki_delete_page is disabled', :skip_gitaly_mock do
+      it_behaves_like 'deleting a wiki page'
+    end
+  end
+
   describe '#create_repo!' do
     it 'creates a repository' do
       expect(raw_repository.exists?).to eq(false)
@@ -343,6 +353,6 @@ describe ProjectWiki do
   end
 
   def destroy_page(page)
-    subject.delete_page(page, commit_details)
+    subject.delete_page(page, "test commit")
   end
 end

spec/models/wiki_page_spec.rb

@@ -402,7 +402,7 @@ describe WikiPage do
 
   def destroy_page(title)
     page = wiki.wiki.page(title: title)
-    wiki.delete_page(page, commit_details)
+    wiki.delete_page(page, "test commit")
   end
 
   def get_slugs(page_or_dir)