Add allowed to push superseding codeowners for web ide

Issue: gitlab.com/gitlab-org/gitlab/-/issues/35097
MR: gitlab.com/gitlab-org/gitlab/-/merge_requests/50608

changelogs/unreleased/add_codeowners_supersede_for_web_ide.yml

+---
+title: Fix codeowners superseding web ide and single file edit
+merge_request: 50608
+author:
+type: fixed

ee/app/services/ee/commits/create_service.rb

@@ -33,6 +33,7 @@ module EE
 
       def check_against_codeowners(project, branch, paths)
         return if paths.empty?
+        return if ::Feature.enabled?(:push_rules_supersede_code_owners, project, default_enabled: true)
 
         ::Gitlab::CodeOwners::Validator.new(project, branch, paths).execute
       end

ee/spec/controllers/ee/projects/blob_controller_spec.rb

@@ -8,7 +8,17 @@ RSpec.describe Projects::BlobController do
 
   let(:project) { create(:project, :public, :repository) }
 
-  shared_examples "renders to the expected_view with a code owners error msg" do
+  shared_examples_for "handling the codeowners interaction" do
+    it "redirects to blob" do
+      default_params[:file_path] = "docs/EXAMPLE_FILE"
+
+      subject
+
+      expect(flash[:alert]).to eq(nil)
+      expect(response).to be_redirect
+    end
+
+    context 'when push_rules_supersede_code_owners is false' do
       let(:error_msg) do
         "Pushes to protected branches that contain changes to files that match " \
           "patterns defined in `CODEOWNERS` are disabled for this project. " \
@@ -32,6 +42,7 @@ RSpec.describe Projects::BlobController do
         end
 
         stub_licensed_features(code_owner_approval_required: true)
+        stub_feature_flags(push_rules_supersede_code_owners: false)
       end
 
       it "renders to the edit page with an error msg" do
@@ -43,6 +54,7 @@ RSpec.describe Projects::BlobController do
         expect(response).to render_template(expected_view)
       end
     end
+  end
 
   describe 'POST create' do
     let(:user) { create(:user) }
@@ -70,7 +82,7 @@ RSpec.describe Projects::BlobController do
       expect(response).to be_redirect
     end
 
-    it_behaves_like "renders to the expected_view with a code owners error msg" do
+    it_behaves_like "handling the codeowners interaction" do
       subject { post :create, params: default_params }
 
       let(:expected_view) { :new }
@@ -96,7 +108,7 @@ RSpec.describe Projects::BlobController do
       sign_in(user)
     end
 
-    it_behaves_like "renders to the expected_view with a code owners error msg" do
+    it_behaves_like "handling the codeowners interaction" do
       subject { put :update, params: default_params }
 
       let(:expected_view) { :edit }

ee/spec/features/ide/user_commits_changes_spec.rb

@@ -24,6 +24,19 @@ RSpec.describe 'EE IDE user commits changes', :js do
     ide_visit(project)
   end
 
+  it 'does not show an error message' do
+    ide_create_new_file('test.rb', content: '# A ruby file')
+
+    ide_commit
+
+    expect(page).not_to have_content('CODEOWNERS rule violation')
+  end
+
+  context 'when the push_rules_supersede_codeowners is false' do
+    before do
+      stub_feature_flags(push_rules_supersede_code_owners: false)
+    end
+
     it 'shows error message' do
       ide_create_new_file('test.rb', content: '# A ruby file')
 
@@ -31,4 +44,5 @@ RSpec.describe 'EE IDE user commits changes', :js do
 
       expect(page).to have_content('CODEOWNERS rule violation')
     end
+  end
 end

ee/spec/requests/api/commits_spec.rb

@@ -11,10 +11,20 @@ RSpec.describe API::Commits do
     project.add_maintainer(user)
   end
 
-  shared_examples_for "returns a 400 from a codeowners violation" do
+  shared_examples_for "handling the codeowners interaction" do
+    it "does not create a new validator" do
+      expect(Gitlab::CodeOwners::Validator)
+        .not_to receive(:new)
+
+      subject
+    end
+
+    context 'when push_rules_supersede_code_owners is false' do
       let(:error_msg) { "CodeOwners error msg" }
 
       before do
+        stub_feature_flags(push_rules_supersede_code_owners: false)
+
         allow(ProtectedBranch)
           .to receive(:branch_requires_code_owner_approval?)
           .with(project, branch).and_return(code_owner_approval_required)
@@ -38,6 +48,7 @@ RSpec.describe API::Commits do
         expect(json_response["message"]).to include(error_msg)
       end
     end
+  end
 
   describe "POST /projects/:id/repository/commits" do
     let!(:url) { "/projects/#{project_id}/repository/commits" }
@@ -80,7 +91,7 @@ RSpec.describe API::Commits do
           let(:branch) { valid_c_params[:branch] }
           let(:paths)  { valid_c_params[:actions].first[:file_path] }
 
-          it_behaves_like "returns a 400 from a codeowners violation"
+          it_behaves_like "handling the codeowners interaction"
         end
       end
     end
@@ -115,7 +126,7 @@ RSpec.describe API::Commits do
         let(:branch) { valid_d_params[:branch] }
         let(:paths)  { valid_d_params[:actions].first[:file_path] }
 
-        it_behaves_like "returns a 400 from a codeowners violation"
+        it_behaves_like "handling the codeowners interaction"
       end
     end
 
@@ -154,7 +165,7 @@ RSpec.describe API::Commits do
           [action[:file_path], action[:previous_path]]
         end
 
-        it_behaves_like "returns a 400 from a codeowners violation"
+        it_behaves_like "handling the codeowners interaction"
       end
     end
   end
@@ -185,7 +196,7 @@ RSpec.describe API::Commits do
         let(:code_owner_approval_required) { true }
         let(:paths) { commit.raw_deltas.flat_map { |diff| [diff.new_path, diff.old_path] }.uniq }
 
-        it_behaves_like "returns a 400 from a codeowners violation"
+        it_behaves_like "handling the codeowners interaction"
       end
     end
   end
@@ -219,7 +230,7 @@ RSpec.describe API::Commits do
         let(:code_owner_approval_required) { true }
         let(:paths) { commit.raw_deltas.flat_map { |diff| [diff.new_path, diff.old_path] }.uniq }
 
-        it_behaves_like "returns a 400 from a codeowners violation"
+        it_behaves_like "handling the codeowners interaction"
       end
     end
   end

ee/spec/services/ee/commits/create_service_spec.rb

@@ -5,13 +5,15 @@ require 'spec_helper'
 RSpec.describe Commits::CreateService do
   let(:project) { create(:project) }
   let(:user) { create(:user) }
+  let(:branch_name) { 'master' }
+  let(:extra_params) { {} }
 
   before do
     project.add_maintainer(user)
   end
 
   subject(:service) do
-    described_class.new(project, user, start_branch: 'master', branch_name: 'master')
+    described_class.new(project, user, start_branch: branch_name, branch_name: branch_name, **extra_params)
   end
 
   describe '#execute' do
@@ -29,5 +31,30 @@ RSpec.describe Commits::CreateService do
       expect(result[:status]).to be(:error)
       expect(result[:message]).to eq('Your changes could not be committed, because this repository has exceeded its size limit of 1 Byte by 1 Byte')
     end
+
+    context 'when validating codeowners' do
+      let(:extra_params) { { file_path: 'path', actions: [{ file_path: 'a', previous_path: 'b' }] } }
+
+      context 'when the paths are empty' do
+        let(:extra_params) { {} }
+
+        it 'does not validate' do
+          expect(::Gitlab::CodeOwners::Validator).not_to receive(:new)
+          result
+        end
+      end
+
+      it 'does not validate when the push_rules_supersede_code_owners flag is true' do
+        expect(::Gitlab::CodeOwners::Validator).not_to receive(:new)
+        result
+      end
+
+      it 'validates the code owners file when the push_rules_supersede_code_owners flag is false' do
+        stub_feature_flags(push_rules_supersede_code_owners: false)
+        expect(::Gitlab::CodeOwners::Validator).to receive(:new).with(project, branch_name, %w[path a b]).and_call_original
+
+        result
+      end
+    end
   end
 end