Automatic merge of gitlab-org/gitlab-ce master

changelogs/unreleased/9978-moved-code-differences-from-EE-to-CE.yml

+---
+title: "Moved EE/CE code differences for `app/assets/javascripts/gl_dropdown.js` into CE"
+merge_request: 28711
+author: Michel Engelen
+type: other

changelogs/unreleased/use-source-ref-name-in-webhook.yml

+---
+title: Use source ref in pipeline webhook
+merge_request: 28772
+author:
+type: fixed

lib/gitlab/data_builder/pipeline.rb

@@ -19,7 +19,7 @@ module Gitlab
       def hook_attrs(pipeline)
         {
           id: pipeline.id,
-          ref: pipeline.ref,
+          ref: pipeline.source_ref,
           tag: pipeline.tag,
           sha: pipeline.sha,
           before_sha: pipeline.before_sha,

spec/lib/gitlab/data_builder/pipeline_spec.rb

@@ -50,5 +50,14 @@ describe Gitlab::DataBuilder::Pipeline do
       it { expect(attributes[:variables]).to be_a(Array) }
       it { expect(attributes[:variables]).to contain_exactly({ key: 'TRIGGER_KEY_1', value: 'TRIGGER_VALUE_1' }) }
     end
+
+    context 'when pipeline is a detached merge request pipeline' do
+      let(:merge_request) { create(:merge_request, :with_detached_merge_request_pipeline) }
+      let(:pipeline) { merge_request.all_pipelines.first }
+
+      it 'returns a source ref' do
+        expect(attributes[:ref]).to eq(merge_request.source_branch)
+      end
+    end
   end
 end