1 files changed, 19 insertions, 0 deletions
diff --git a/rubocop/cop/feature_flag_usage.rb b/rubocop/cop/feature_flag_usage.rb
new file mode 100644
index 00000000000..60e82633466
--- /dev/null
+++ b/rubocop/cop/feature_flag_usage.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+module RuboCop
+  module Cop
+    class FeatureFlagUsage < RuboCop::Cop::Base
+      MSG = 'Do not use Feature Flags for monkey-patches or Redis code. Use environment variables instead.'
+
+      def_node_matcher :using_feature_flag?, <<~PATTERN
+        (send (const {nil? | cbase} :Feature) {:enabled? | :disabled?} ...)
+      PATTERN
+
+      def on_send(node)
+        return unless using_feature_flag?(node)
+
+        add_offense(node, message: MSG)
+      end
+    end
+  end
+end