Merge branch '339197-fj-linear-manageable-groups' into 'master'

Use linear version of User#manageable_groups

See merge request gitlab-org/gitlab!68845

app/models/user.rb

@@ -1550,7 +1550,11 @@ class User < ApplicationRecord
   end
 
   def manageable_groups(include_groups_with_developer_maintainer_access: false)
-    owned_and_maintainer_group_hierarchy = Gitlab::ObjectHierarchy.new(owned_or_maintainers_groups).base_and_descendants
+    owned_and_maintainer_group_hierarchy = if Feature.enabled?(:linear_user_manageable_groups, self, default_enabled: :yaml)
+                                             owned_or_maintainers_groups.self_and_descendants
+                                           else
+                                             Gitlab::ObjectHierarchy.new(owned_or_maintainers_groups).base_and_descendants
+                                           end
 
     if include_groups_with_developer_maintainer_access
       union_sql = ::Gitlab::SQL::Union.new(

config/feature_flags/development/linear_user_manageable_groups.yml

+---
+name: linear_user_manageable_groups
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/68845
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/339434
+milestone: '14.3'
+type: development
+group: group::access
+default_enabled: false

spec/models/user_spec.rb

@@ -1755,6 +1755,7 @@ RSpec.describe User do
       end
 
       describe '#manageable_groups' do
+        shared_examples 'manageable groups examples' do
           it 'includes all the namespaces the user can manage' do
             expect(user.manageable_groups).to contain_exactly(group, subgroup)
           end
@@ -1766,6 +1767,17 @@ RSpec.describe User do
           end
         end
 
+        it_behaves_like 'manageable groups examples'
+
+        context 'when feature flag :linear_user_manageable_groups is disabled' do
+          before do
+            stub_feature_flags(linear_user_manageable_groups: false)
+          end
+
+          it_behaves_like 'manageable groups examples'
+        end
+      end
+
       describe '#manageable_groups_with_routes' do
         it 'eager loads routes from manageable groups' do
           control_count =