1 files changed, 32 insertions, 0 deletions
diff --git a/lib/gitlab/ci/variables/helpers.rb b/lib/gitlab/ci/variables/helpers.rb
new file mode 100644
index 00000000000..e2a54f90ecb
--- /dev/null
+++ b/lib/gitlab/ci/variables/helpers.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    module Variables
+      module Helpers
+        class << self
+          def merge_variables(current_vars, new_vars)
+            current_vars = transform_from_yaml_variables(current_vars)
+            new_vars = transform_from_yaml_variables(new_vars)
+
+            transform_to_yaml_variables(
+              current_vars.merge(new_vars)
+            )
+          end
+
+          def transform_to_yaml_variables(vars)
+            vars.to_h.map do |key, value|
+              { key: key.to_s, value: value, public: true }
+            end
+          end
+
+          def transform_from_yaml_variables(vars)
+            return vars.stringify_keys if vars.is_a?(Hash)
+
+            vars.to_a.map { |var| [var[:key].to_s, var[:value]] }.to_h
+          end
+        end
+      end
+    end
+  end
+end