1 files changed, 44 insertions, 0 deletions
diff --git a/tooling/danger/feature_flag.rb b/tooling/danger/feature_flag.rb
new file mode 100644
index 00000000000..2e65831ef9f
--- /dev/null
+++ b/tooling/danger/feature_flag.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+require 'yaml'
+
+module Tooling
+  module Danger
+    module FeatureFlag
+      # `change_type` can be:
+      #   - :added
+      #   - :modified
+      #   - :deleted
+      def feature_flag_files(change_type:)
+        files = git.public_send("#{change_type}_files") # rubocop:disable GitlabSecurity/PublicSend
+        files.select { |path| path =~ %r{\A(ee/)?config/feature_flags/} }.map { |path| Found.new(path) }
+      end
+
+      class Found
+        attr_reader :path
+
+        def initialize(path)
+          @path = path
+        end
+
+        def raw
+          @raw ||= File.read(path)
+        end
+
+        def group
+          @group ||= yaml['group']
+        end
+
+        def group_match_mr_label?(mr_group_label)
+          mr_group_label == group
+        end
+
+        private
+
+        def yaml
+          @yaml ||= YAML.safe_load(raw)
+        end
+      end
+    end
+  end
+end