Don't create build failed todo when build is retried

When a build is retried automatically, we close any open todos. However, we do
that _before_ creating a new build failed todo.

To solve this, we check if the build is retried before creating the todo. We
also ensure that the build _instance_ has the correct attribute set, without
needing to reload it from the database.

app/services/ci/retry_build_service.rb

@@ -28,6 +28,8 @@ module Ci
 
       attributes.push([:user, current_user])
 
+      build.retried = true
+
       Ci::Build.transaction do
         # mark all other builds of that name as retried
         build.pipeline.builds.latest

app/services/merge_requests/add_todo_when_build_fails_service.rb

@@ -3,7 +3,7 @@ module MergeRequests
     # Adds a todo to the parent merge_request when a CI build fails
     #
     def execute(commit_status)
-      return if commit_status.allow_failure?
+      return if commit_status.allow_failure? || commit_status.retried?
 
       commit_status_merge_requests(commit_status) do |merge_request|
         todo_service.merge_request_build_failed(merge_request)

changelogs/unreleased/38236-remove-build-failed-todo-if-it-has-been-auto-retried.yml

+---
+title: Don't create build failed todos when the job is automatically retried
+merge_request:
+author:
+type: fixed

spec/models/ci/build_spec.rb

@@ -1743,19 +1743,34 @@ describe Ci::Build do
   end
 
   describe 'state transition when build fails' do
+    let(:service) { MergeRequests::AddTodoWhenBuildFailsService.new(project, user) }
+
+    before do
+      allow(MergeRequests::AddTodoWhenBuildFailsService).to receive(:new).and_return(service)
+      allow(service).to receive(:close)
+    end
+
     context 'when build is configured to be retried' do
-      subject { create(:ci_build, :running, options: { retry: 3 }) }
+      subject { create(:ci_build, :running, options: { retry: 3 }, project: project, user: user) }
 
-      it 'retries builds and assigns a same user to it' do
+      it 'retries build and assigns the same user to it' do
         expect(described_class).to receive(:retry)
-          .with(subject, subject.user)
+          .with(subject, user)
+
+        subject.drop!
+      end
+
+      it 'does not try to create a todo' do
+        project.add_developer(user)
+
+        expect(service).not_to receive(:commit_status_merge_requests)
 
         subject.drop!
       end
     end
 
     context 'when build is not configured to be retried' do
-      subject { create(:ci_build, :running) }
+      subject { create(:ci_build, :running, project: project, user: user) }
 
       it 'does not retry build' do
         expect(described_class).not_to receive(:retry)
@@ -1770,6 +1785,14 @@ describe Ci::Build do
 
         subject.drop!
       end
+
+      it 'creates a todo' do
+        project.add_developer(user)
+
+        expect(service).to receive(:commit_status_merge_requests)
+
+        subject.drop!
+      end
     end
   end
 end

spec/services/ci/retry_build_service_spec.rb

@@ -160,8 +160,9 @@ describe Ci::RetryBuildService do
         expect(new_build).to be_created
       end
 
-      it 'does mark old build as retried' do
+      it 'does mark old build as retried in the database and on the instance' do
         expect(new_build).to be_latest
+        expect(build).to be_retried
         expect(build.reload).to be_retried
       end
     end