Merge branch 'gitaly-700-wiki-update-page' into 'master'

Migrate GitLab::Git::Wiki.update_page to Gitaly

Closes gitaly#700

See merge request gitlab-org/gitlab-ce!15268

GITALY_SERVER_VERSION

-0.51.0
+0.52.0

lib/gitlab/git/wiki.rb

@@ -48,11 +48,14 @@ module Gitlab
       end
 
       def update_page(page_path, title, format, content, commit_details)
-        assert_type!(format, Symbol)
-        assert_type!(commit_details, CommitDetails)
-
-        gollum_wiki.update_page(gollum_page_by_path(page_path), title, format, content, commit_details.to_h)
-        nil
+        @repository.gitaly_migrate(:wiki_update_page) do |is_enabled|
+          if is_enabled
+            gitaly_update_page(page_path, title, format, content, commit_details)
+            gollum_wiki.clear_cache
+          else
+            gollum_update_page(page_path, title, format, content, commit_details)
+          end
+        end
       end
 
       def pages
@@ -149,6 +152,14 @@ module Gitlab
         nil
       end
 
+      def gollum_update_page(page_path, title, format, content, commit_details)
+        assert_type!(format, Symbol)
+        assert_type!(commit_details, CommitDetails)
+
+        gollum_wiki.update_page(gollum_page_by_path(page_path), title, format, content, commit_details.to_h)
+        nil
+      end
+
       def gollum_find_page(title:, version: nil, dir: nil)
         if version
           version = Gitlab::Git::Commit.find(@repository, version).id
@@ -172,6 +183,10 @@ module Gitlab
         gitaly_wiki_client.write_page(name, format, content, commit_details)
       end
 
+      def gitaly_update_page(page_path, title, format, content, commit_details)
+        gitaly_wiki_client.update_page(page_path, title, format, content, commit_details)
+      end
+
       def gitaly_delete_page(page_path, commit_details)
         gitaly_wiki_client.delete_page(page_path, commit_details)
       end

lib/gitlab/gitaly_client/wiki_service.rb

@@ -37,6 +37,31 @@ module Gitlab
         end
       end
 
+      def update_page(page_path, title, format, content, commit_details)
+        request = Gitaly::WikiUpdatePageRequest.new(
+          repository: @gitaly_repo,
+          page_path: GitalyClient.encode(page_path),
+          title: GitalyClient.encode(title),
+          format: format.to_s,
+          commit_details: gitaly_commit_details(commit_details)
+        )
+
+        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::WikiUpdatePageRequest.new
+          end
+        end
+
+        GitalyClient.call(@repository.storage, :wiki_service, :wiki_update_page, enum)
+      end
+
       def delete_page(page_path, commit_details)
         request = Gitaly::WikiDeletePageRequest.new(
           repository: @gitaly_repo,