1 files changed, 24 insertions, 0 deletions
diff --git a/rubocop/cop/default_scope.rb b/rubocop/cop/default_scope.rb
new file mode 100644
index 00000000000..39f8c8e9ed0
--- /dev/null
+++ b/rubocop/cop/default_scope.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+module RuboCop
+  module Cop
+    # Cop that blacklists the use of `default_scope`.
+    class DefaultScope < RuboCop::Cop::Cop
+      MSG = <<~EOF
+        Do not use `default_scope`, as it does not follow the principle of
+        least surprise. See https://gitlab.com/gitlab-org/gitlab/-/merge_requests/33847
+        for more details.
+      EOF
+
+      def_node_matcher :default_scope?, <<~PATTERN
+        (send {nil? (const nil? ...)} :default_scope ...)
+      PATTERN
+
+      def on_send(node)
+        return unless default_scope?(node)
+
+        add_offense(node, location: :expression)
+      end
+    end
+  end
+end