1 files changed, 30 insertions, 0 deletions
diff --git a/lib/gitlab/class_attributes.rb b/lib/gitlab/class_attributes.rb
new file mode 100644
index 00000000000..6560c97b2e6
--- /dev/null
+++ b/lib/gitlab/class_attributes.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module ClassAttributes
+    extend ActiveSupport::Concern
+
+    class_methods do
+      protected
+
+      # Returns an attribute declared on this class or its parent class.
+      # This approach allows declared attributes to be inherited by
+      # child classes.
+      def get_class_attribute(name)
+        class_attributes[name] || superclass_attributes(name)
+      end
+
+      private
+
+      def class_attributes
+        @class_attributes ||= {}
+      end
+
+      def superclass_attributes(name)
+        return unless superclass.include? Gitlab::ClassAttributes
+
+        superclass.get_class_attribute(name)
+      end
+    end
+  end
+end