Use Gitaly's RepositoryService.HasLocalBranches RPC

lib/gitlab/git/repository.rb

@@ -193,7 +193,7 @@ module Gitlab
       def has_local_branches?
         gitaly_migrate(:has_local_branches) do |is_enabled|
           if is_enabled
-            gitaly_ref_client.has_local_branches?
+            gitaly_repository_client.has_local_branches?
           else
             has_local_branches_rugged?
           end

lib/gitlab/gitaly_client/ref_service.rb

@@ -57,14 +57,6 @@ module Gitlab
         branch_names.count
       end
 
-      # TODO implement a more efficient RPC for this https://gitlab.com/gitlab-org/gitaly/issues/616
-      def has_local_branches?
-        request = Gitaly::FindAllBranchNamesRequest.new(repository: @gitaly_repo)
-        response = GitalyClient.call(@storage, :ref_service, :find_all_branch_names, request).first
-
-        response&.names.present?
-      end
-
       def local_branches(sort_by: nil)
         request = Gitaly::FindLocalBranchesRequest.new(repository: @gitaly_repo)
         request.sort_by = sort_by_param(sort_by) if sort_by

lib/gitlab/gitaly_client/repository_service.rb

@@ -58,6 +58,13 @@ module Gitlab
         request = Gitaly::CreateRepositoryRequest.new(repository: @gitaly_repo)
         GitalyClient.call(@storage, :repository_service, :create_repository, request)
       end
+
+      def has_local_branches?
+        request = Gitaly::HasLocalBranchesRequest.new(repository: @gitaly_repo)
+        response = GitalyClient.call(@storage, :repository_service, :has_local_branches, request)
+
+        response.value
+      end
     end
   end
 end

spec/lib/gitlab/gitaly_client/repository_service_spec.rb

@@ -73,4 +73,15 @@ describe Gitlab::GitalyClient::RepositoryService do
       client.apply_gitattributes(revision)
     end
   end
+
+  describe '#has_local_branches?' do
+    it 'sends a has_local_branches message' do
+      expect_any_instance_of(Gitaly::RepositoryService::Stub)
+        .to receive(:has_local_branches)
+        .with(gitaly_request_with_path(storage_name, relative_path), kind_of(Hash))
+        .and_return(double(value: true))
+
+      expect(client.has_local_branches?).to be(true)
+    end
+  end
 end