Add CanMoveRepositoryStorage concern to Group

In this commit we add the necessary functionality to groups
to interact with the `repository_read_only` column.

Groups doesn't have the column in its table but in the
`namespace_settings` one. That's why we need to override
some methods and use them as proxy for this operation.

app/models/concerns/can_move_repository_storage.rb

@@ -16,10 +16,10 @@ module CanMoveRepositoryStorage
         !skip_git_transfer_check && git_transfer_in_progress?
 
       raise RepositoryReadOnlyError, _('Repository already read-only') if
-        self.class.where(id: id).pick(:repository_read_only)
+        _safe_read_repository_read_only_column
 
       raise ActiveRecord::RecordNotSaved, _('Database update failed') unless
-        update_column(:repository_read_only, true)
+        _update_repository_read_only_column(true)
 
       nil
     end
@@ -30,7 +30,7 @@ module CanMoveRepositoryStorage
   def set_repository_writable!
     with_lock do
       raise ActiveRecord::RecordNotSaved, _('Database update failed') unless
-        update_column(:repository_read_only, false)
+        _update_repository_read_only_column(false)
 
       nil
     end
@@ -43,4 +43,19 @@ module CanMoveRepositoryStorage
   def reference_counter(type:)
     Gitlab::ReferenceCounter.new(type.identifier_for_container(self))
   end
+
+  private
+
+  # Not all resources that can move repositories have the `repository_read_only`
+  # in their table, for example groups. We need these methods to override the
+  # behavior in those classes in order to access the column.
+  def _safe_read_repository_read_only_column
+    # This was added originally this way because of
+    # https://gitlab.com/gitlab-org/gitlab/-/commit/43f9b98302d3985312c9f8b66018e2835d8293d2
+    self.class.where(id: id).pick(:repository_read_only)
+  end
+
+  def _update_repository_read_only_column(value)
+    update_column(:repository_read_only, value)
+  end
 end

ee/app/models/ee/group.rb

@@ -14,6 +14,7 @@ module EE
       include InsightsFeature
       include HasTimelogsReport
       include HasWiki
+      include CanMoveRepositoryStorage
 
       add_authentication_token_field :saml_discovery_token, unique: false, token_generator: -> { Devise.friendly_token(8) }
 
@@ -49,6 +50,7 @@ module EE
       has_one :deletion_schedule, class_name: 'GroupDeletionSchedule'
       delegate :deleting_user, :marked_for_deletion_on, to: :deletion_schedule, allow_nil: true
       delegate :enforced_group_managed_accounts?, :enforced_sso?, to: :saml_provider, allow_nil: true
+      delegate :repository_read_only, :repository_read_only?, to: :namespace_settings, allow_nil: true
 
       has_one :group_wiki_repository
       has_many :repository_storage_moves, class_name: 'Groups::RepositoryStorageMove', inverse_of: :container
@@ -455,6 +457,11 @@ module EE
       end
     end
 
+    override :git_transfer_in_progress?
+    def git_transfer_in_progress?
+      reference_counter(type: ::Gitlab::GlRepository::WIKI).value > 0
+    end
+
     private
 
     def custom_project_templates_group_allowed
@@ -517,5 +524,17 @@ module EE
     def invited_or_shared_group_members(groups)
       ::GroupMember.active_without_invites_and_requests.where(source_id: ::Gitlab::ObjectHierarchy.new(groups).base_and_ancestors)
     end
+
+    override :_safe_read_repository_read_only_column
+    def _safe_read_repository_read_only_column
+      ::NamespaceSetting.where(namespace: self).pick(:repository_read_only)
+    end
+
+    override :_update_repository_read_only_column
+    def _update_repository_read_only_column(value)
+      settings = namespace_settings || create_namespace_settings
+
+      settings.update_column(:repository_read_only, value)
+    end
   end
 end

ee/lib/ee/gitlab/gl_repository/repo_type.rb

@@ -8,7 +8,7 @@ module EE
 
         override :identifier_for_container
         def identifier_for_container(container)
-          if container.is_a?(GroupWiki)
+          if container.is_a?(GroupWiki) || (wiki? && container.is_a?(Group))
             "group-#{container.id}-#{name}"
           else
             super

ee/spec/lib/gitlab/gl_repository/repo_type_spec.rb

@@ -14,6 +14,12 @@ RSpec.describe Gitlab::GlRepository::RepoType do
         let(:expected_container) { wiki }
         let(:expected_repository) { ::Repository.new(wiki.full_path, wiki, shard: wiki.repository_storage, disk_path: wiki.disk_path, repo_type: Gitlab::GlRepository::WIKI) }
       end
+
+      describe '#identifier_for_container' do
+        subject { described_class.identifier_for_container(wiki.group) }
+
+        it { is_expected.to eq("group-#{wiki.group.id}-wiki") }
+      end
     end
   end
 end

ee/spec/models/group_spec.rb

@@ -1263,4 +1263,10 @@ RSpec.describe Group do
       end
     end
   end
+
+  it_behaves_like 'can move repository storage' do
+    let_it_be(:container) { create(:group, :wiki_repo) }
+
+    let(:repository) { container.wiki.repository }
+  end
 end

spec/support/shared_examples/models/concerns/can_move_repository_storage_shared_examples.rb

@@ -2,11 +2,12 @@
 
 RSpec.shared_examples 'can move repository storage' do
   let(:container) { raise NotImplementedError }
+  let(:repository) { container.repository }
 
   describe '#set_repository_read_only!' do
     it 'makes the repository read-only' do
       expect { container.set_repository_read_only! }
-        .to change(container, :repository_read_only?)
+        .to change { container.repository_read_only? }
         .from(false)
         .to(true)
     end
@@ -28,7 +29,7 @@ RSpec.shared_examples 'can move repository storage' do
         allow(container).to receive(:git_transfer_in_progress?) { true }
 
         expect { container.set_repository_read_only!(skip_git_transfer_check: true) }
-          .to change(container, :repository_read_only?)
+          .to change { container.repository_read_only? }
           .from(false)
           .to(true)
       end
@@ -38,16 +39,16 @@ RSpec.shared_examples 'can move repository storage' do
   describe '#set_repository_writable!' do
     it 'sets repository_read_only to false' do
       expect { container.set_repository_writable! }
-        .to change(container, :repository_read_only)
+        .to change { container.repository_read_only? }
         .from(true).to(false)
     end
   end
 
   describe '#reference_counter' do
     it 'returns a Gitlab::ReferenceCounter object' do
-      expect(Gitlab::ReferenceCounter).to receive(:new).with(container.repository.gl_repository).and_call_original
+      expect(Gitlab::ReferenceCounter).to receive(:new).with(repository.gl_repository).and_call_original
 
-      result = container.reference_counter(type: container.repository.repo_type)
+      result = container.reference_counter(type: repository.repo_type)
 
       expect(result).to be_a Gitlab::ReferenceCounter
     end