Render link to branch only when branch still exists

app/views/projects/pipelines/_info.html.haml

@@ -13,7 +13,11 @@
       = pluralize @pipeline.total_size, "job"
       - if @pipeline.ref
         from
+        - if @project.repository.branch_exists?(@pipeline.ref)
           = link_to @pipeline.ref, project_ref_path(@project, @pipeline.ref), class: "ref-name"
+        - else
+          %span.ref-name
+            = @pipeline.ref
       - if @pipeline.duration
         in
         = time_interval_in_words(@pipeline.duration)

changelogs/unreleased/42611-removed-branch-link.yml

+---
+title: Only render link to branch when branch still exists in pipeline page
+merge_request:
+author:
+type: fixed

spec/features/projects/pipelines/pipeline_spec.rb

@@ -63,6 +63,11 @@ describe 'Pipeline', :js do
       expect(page).to have_css('#js-tab-pipeline.active')
     end
 
+    it 'shows link to the pipeline ref' do
+      expect(page).to have_link(pipeline.ref)
+    end
+
+
     it_behaves_like 'showing user status' do
       let(:user_with_status) { pipeline.user }
 
@@ -208,6 +213,18 @@ describe 'Pipeline', :js do
         it { expect(page).not_to have_content('Cancel running') }
       end
     end
+
+    context 'with deleted branch' do
+      before do
+        DeleteBranchService.new(@project, @user).execute(pipeline.ref)
+      end
+
+      it 'does not render link to the pipeline ref' do
+        expect(page).not_to have_link(pipeline.ref)
+        expect(page).to have_content(pipeline.ref)
+      end
+    end
+
   end
 
   context 'when user does not have access to read jobs' do