1 files changed, 31 insertions, 0 deletions
diff --git a/lib/gitlab/ci/config/external/rules.rb b/lib/gitlab/ci/config/external/rules.rb
new file mode 100644
index 00000000000..5a788427172
--- /dev/null
+++ b/lib/gitlab/ci/config/external/rules.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    class Config
+      module External
+        class Rules
+          def initialize(rule_hashes)
+            @rule_list = Build::Rules::Rule.fabricate_list(rule_hashes)
+          end
+
+          def evaluate(context)
+            Result.new(@rule_list.nil? || match_rule(context))
+          end
+
+          private
+
+          def match_rule(context)
+            @rule_list.find { |rule| rule.matches?(nil, context) }
+          end
+
+          Result = Struct.new(:result) do
+            def pass?
+              !!result
+            end
+          end
+        end
+      end
+    end
+  end
+end