Incorporate Gitaly's RefService.DeleteRefs RPC

GITALY_SERVER_VERSION

-0.53.0
+0.54.0

Gemfile

@@ -398,7 +398,7 @@ group :ed25519 do
 end
 # Gitaly GRPC client
-gem 'gitaly-proto', '~> 0.52.0', require: 'gitaly'
+gem 'gitaly-proto', '~> 0.54.0', require: 'gitaly'
 gem 'toml-rb', '~> 0.3.15', require: false

Gemfile.lock

@@ -275,7 +275,7 @@ GEM
       po_to_json (>= 1.0.0)
       rails (>= 3.2.0)
     gherkin-ruby (0.3.2)
-    gitaly-proto (0.52.0)
+    gitaly-proto (0.54.0)
       google-protobuf (~> 3.1)
       grpc (~> 1.0)
     github-linguist (4.7.6)
@@ -1034,7 +1034,7 @@ DEPENDENCIES
   gettext (~> 3.2.2)
   gettext_i18n_rails (~> 1.8.0)
   gettext_i18n_rails_js (~> 1.2.0)
-  gitaly-proto (~> 0.52.0)
+  gitaly-proto (~> 0.54.0)
   github-linguist (~> 4.7.0)
   gitlab-flowdock-git-hook (~> 1.0.1)
   gitlab-markup (~> 1.6.2)

lib/gitlab/git/repository.rb

@@ -304,7 +304,13 @@ module Gitlab
       end
       def delete_all_refs_except(prefixes)
-        delete_refs(*all_ref_names_except(prefixes))
+        gitaly_migrate(:ref_delete_refs) do |is_enabled|
+          if is_enabled
+            gitaly_ref_client.delete_refs(except_with_prefixes: prefixes)
+          else
+            delete_refs(*all_ref_names_except(prefixes))
+          end
+        end
       end
       # Returns an Array of all ref names, except when it's matching pattern

lib/gitlab/gitaly_client/ref_service.rb

@@ -126,6 +126,15 @@ module Gitlab
         GitalyClient.call(@repository.storage, :ref_service, :delete_branch, request)
       end
+      def delete_refs(except_with_prefixes:)
+        request = Gitaly::DeleteRefsRequest.new(
+          repository: @gitaly_repo,
+          except_with_prefix: except_with_prefixes
+        )
+
+        GitalyClient.call(@repository.storage, :ref_service, :delete_refs, request)
+      end
+
       private
       def consume_refs_response(response)

spec/lib/gitlab/git/repository_spec.rb

@@ -1770,6 +1770,32 @@ describe Gitlab::Git::Repository, seed_helper: true do
     end
   end
+  describe '#delete_all_refs_except' do
+    let(:repository) do
+      Gitlab::Git::Repository.new('default', TEST_MUTABLE_REPO_PATH, '')
+    end
+
+    before do
+      repository.write_ref("refs/delete/a", "0b4bc9a49b562e85de7cc9e834518ea6828729b9")
+      repository.write_ref("refs/also-delete/b", "12d65c8dd2b2676fa3ac47d955accc085a37a9c1")
+      repository.write_ref("refs/keep/c", "6473c90867124755509e100d0d35ebdc85a0b6ae")
+      repository.write_ref("refs/also-keep/d", "0b4bc9a49b562e85de7cc9e834518ea6828729b9")
+    end
+
+    after do
+      ensure_seeds
+    end
+
+    it 'deletes all refs except those with the specified prefixes' do
+      repository.delete_all_refs_except(%w(refs/keep refs/also-keep refs/heads))
+      expect(repository.ref_exists?("refs/delete/a")).to be(false)
+      expect(repository.ref_exists?("refs/also-delete/b")).to be(false)
+      expect(repository.ref_exists?("refs/keep/c")).to be(true)
+      expect(repository.ref_exists?("refs/also-keep/d")).to be(true)
+      expect(repository.ref_exists?("refs/heads/master")).to be(true)
+    end
+  end
+
   def create_remote_branch(repository, remote_name, branch_name, source_branch_name)
     source_branch = repository.branches.find { |branch| branch.name == source_branch_name }
     rugged = repository.rugged

spec/lib/gitlab/gitaly_client/ref_service_spec.rb

@@ -104,4 +104,17 @@ describe Gitlab::GitalyClient::RefService do
       expect { client.ref_exists?('reXXXXX') }.to raise_error(ArgumentError)
     end
   end
+
+  describe '#delete_refs' do
+    let(:prefixes) { %w(refs/heads refs/keep-around) }
+
+    it 'sends a delete_refs message' do
+      expect_any_instance_of(Gitaly::RefService::Stub)
+        .to receive(:delete_refs)
+        .with(gitaly_request_with_params(except_with_prefix: prefixes), kind_of(Hash))
+        .and_return(double('delete_refs_response'))
+
+      client.delete_refs(except_with_prefixes: prefixes)
+    end
+  end
 end