Merge branch '339233-fj-use-application_setting-ancestor-linear-scopes' into 'master'

Use ApplicationSetting ancestors linear scopes

See merge request gitlab-org/gitlab!70579

config/feature_flags/development/linear_application_setting_ancestor_scopes.yml

+---
+name: linear_application_setting_ancestor_scopes
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/70579
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/341346
+milestone: '14.4'
+type: development
+group: group::access
+default_enabled: false

ee/app/models/ee/application_setting.rb

@@ -384,11 +384,14 @@ module EE
     private
 
     def elasticsearch_limited_project_exists?(project)
-      indexed_namespaces = ::Gitlab::ObjectHierarchy
-        .new(::Namespace.where(id: project.namespace_id))
-        .base_and_ancestors
-        .joins(:elasticsearch_indexed_namespace)
+      project_namespaces = ::Namespace.where(id: project.namespace_id)
+      indexed_namespaces = if ::Feature.enabled?(:linear_application_setting_ancestor_scopes, default_enabled: :yaml)
+                             project_namespaces.self_and_ancestors
+                           else
+                             ::Gitlab::ObjectHierarchy.new(project_namespaces).base_and_ancestors
+                           end
 
+      indexed_namespaces = indexed_namespaces.joins(:elasticsearch_indexed_namespace)
       indexed_namespaces = ::Project.where('EXISTS (?)', indexed_namespaces)
       indexed_projects = ::Project.where('EXISTS (?)', ElasticsearchIndexedProject.where(project_id: project.id))
 

ee/spec/models/application_setting_spec.rb

@@ -427,6 +427,7 @@ RSpec.describe ApplicationSetting do
         end
 
         describe '#elasticsearch_indexes_project?' do
+          shared_examples 'whether the project is indexed' do
             context 'when project is in a subgroup' do
               let(:root_group) { create(:group) }
               let(:subgroup) { create(:group, parent: root_group) }
@@ -454,6 +455,17 @@ RSpec.describe ApplicationSetting do
               end
             end
           end
+
+          it_behaves_like 'whether the project is indexed'
+
+          context 'when feature flag :linear_application_setting_ancestor_scopes is disabled' do
+            before do
+              stub_feature_flags(linear_application_setting_ancestor_scopes: false)
+            end
+
+            it_behaves_like 'whether the project is indexed'
+          end
+        end
       end
 
       context 'projects' do