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

Closes gitaly#638

GITALY_SERVER_VERSION

-0.47.0
+0.48.0

Gemfile

@@ -398,7 +398,7 @@ group :ed25519 do
 end
 
 # Gitaly GRPC client
-gem 'gitaly-proto', '~> 0.42.0', require: 'gitaly'
+gem 'gitaly-proto', '~> 0.45.0', 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 (0.42.0)
+    gitaly-proto (0.45.0)
       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 (~> 0.42.0)
+  gitaly-proto (~> 0.45.0)
   github-linguist (~> 4.7.0)
   gitlab-flowdock-git-hook (~> 1.0.1)
   gitlab-markup (~> 1.6.2)

lib/gitlab/git/wiki.rb

@@ -23,14 +23,14 @@ module Gitlab
       end
 
       def write_page(name, format, content, commit_details)
-        assert_type!(format, Symbol)
-        assert_type!(commit_details, CommitDetails)
-
-        gollum_wiki.write_page(name, format, content, commit_details.to_h)
-
-        nil
-      rescue Gollum::DuplicatePageError => e
-        raise Gitlab::Git::Wiki::DuplicatePageError, e.message
+        @repository.gitaly_migrate(:wiki_write_page) do |is_enabled|
+          if is_enabled
+            gitaly_write_page(name, format, content, commit_details)
+            gollum_wiki.clear_cache
+          else
+            gollum_write_page(name, format, content, commit_details)
+          end
+        end
       end
 
       def delete_page(page_path, commit_details)
@@ -110,6 +110,25 @@ module Gitlab
           raise ArgumentError, "expected a #{klass}, got #{object.inspect}"
         end
       end
+
+      def gitaly_wiki_client
+        @gitaly_wiki_client ||= Gitlab::GitalyClient::WikiService.new(@repository)
+      end
+
+      def gollum_write_page(name, format, content, commit_details)
+        assert_type!(format, Symbol)
+        assert_type!(commit_details, CommitDetails)
+
+        gollum_wiki.write_page(name, format, content, commit_details.to_h)
+
+        nil
+      rescue Gollum::DuplicatePageError => e
+        raise Gitlab::Git::Wiki::DuplicatePageError, e.message
+      end
+
+      def gitaly_write_page(name, format, content, commit_details)
+        gitaly_wiki_client.write_page(name, format, content, commit_details)
+      end
     end
   end
 end

lib/gitlab/gitaly_client/wiki_service.rb

+require 'stringio'
+
+module Gitlab
+  module GitalyClient
+    class WikiService
+      MAX_MSG_SIZE = 128.kilobytes.freeze
+
+      def initialize(repository)
+        @gitaly_repo = repository.gitaly_repository
+        @repository = repository
+      end
+
+      def write_page(name, format, content, commit_details)
+        request = Gitaly::WikiWritePageRequest.new(
+          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)
+          )
+        )
+
+        strio = StringIO.new(content)
+
+        enum = Enumerator.new do |y|
+          until strio.eof?
+            chunk = strio.read(MAX_MSG_SIZE)
+            request.content = GitalyClient.encode(chunk)
+
+            y.yield request
+
+            request = Gitaly::WikiWritePageRequest.new
+          end
+        end
+
+        response = GitalyClient.call(@repository.storage, :wiki_service, :wiki_write_page, enum)
+        if error = response.duplicate_error.presence
+          raise Gitlab::Git::Wiki::DuplicatePageError, error
+        end
+      end
+    end
+  end
+end

spec/models/project_wiki_spec.rb

@@ -180,6 +180,7 @@ describe ProjectWiki do
   end
 
   describe "#create_page" do
+    shared_examples 'creating a wiki page' do
       after do
         destroy_page(subject.pages.first.page)
       end
@@ -214,6 +215,15 @@ describe ProjectWiki do
       end
     end
 
+    context 'when Gitaly wiki_write_page is enabled' do
+      it_behaves_like 'creating a wiki page'
+    end
+
+    context 'when Gitaly wiki_write_page is disabled', :skip_gitaly_mock do
+      it_behaves_like 'creating a wiki page'
+    end
+  end
+
   describe "#update_page" do
     before do
       create_page("update-page", "some content")