1 files changed, 46 insertions, 0 deletions
diff --git a/lib/gitlab/ci/config/entry/legacy_variables.rb b/lib/gitlab/ci/config/entry/legacy_variables.rb
new file mode 100644
index 00000000000..5379f707537
--- /dev/null
+++ b/lib/gitlab/ci/config/entry/legacy_variables.rb
@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    class Config
+      module Entry
+        ##
+        # Entry that represents environment variables.
+        # This is legacy implementation and will be removed with the FF `ci_variables_refactoring_to_variable`.
+        #
+        class LegacyVariables < ::Gitlab::Config::Entry::Node
+          include ::Gitlab::Config::Entry::Validatable
+
+          ALLOWED_VALUE_DATA = %i[value description].freeze
+
+          validations do
+            validates :config, variables: { allowed_value_data: ALLOWED_VALUE_DATA }, if: :use_value_data?
+            validates :config, variables: true, unless: :use_value_data?
+          end
+
+          def value
+            @config.to_h { |key, value| [key.to_s, expand_value(value)[:value]] }
+          end
+
+          def value_with_data
+            @config.to_h { |key, value| [key.to_s, expand_value(value)] }
+          end
+
+          def use_value_data?
+            opt(:use_value_data)
+          end
+
+          private
+
+          def expand_value(value)
+            if value.is_a?(Hash)
+              { value: value[:value].to_s, description: value[:description] }.compact
+            else
+              { value: value.to_s }
+            end
+          end
+        end
+      end
+    end
+  end
+end