1 files changed, 98 insertions, 0 deletions
diff --git a/lib/gitlab/ci/config/entry/variable.rb b/lib/gitlab/ci/config/entry/variable.rb
new file mode 100644
index 00000000000..253888aadeb
--- /dev/null
+++ b/lib/gitlab/ci/config/entry/variable.rb
@@ -0,0 +1,98 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    class Config
+      module Entry
+        ##
+        # Entry that represents a CI/CD variable.
+        #
+        class Variable < ::Gitlab::Config::Entry::Simplifiable
+          strategy :SimpleVariable, if: -> (config) { SimpleVariable.applies_to?(config) }
+          strategy :ComplexVariable, if: -> (config) { ComplexVariable.applies_to?(config) }
+
+          class SimpleVariable < ::Gitlab::Config::Entry::Node
+            include ::Gitlab::Config::Entry::Validatable
+
+            class << self
+              def applies_to?(config)
+                Gitlab::Config::Entry::Validators::AlphanumericValidator.validate(config)
+              end
+            end
+
+            validations do
+              validates :key, alphanumeric: true
+              validates :config, alphanumeric: true
+            end
+
+            def value
+              @config.to_s
+            end
+
+            def value_with_data
+              { value: @config.to_s }
+            end
+          end
+
+          class ComplexVariable < ::Gitlab::Config::Entry::Node
+            include ::Gitlab::Config::Entry::Validatable
+
+            class << self
+              def applies_to?(config)
+                config.is_a?(Hash)
+              end
+            end
+
+            validations do
+              validates :key, alphanumeric: true
+              validates :config_value, alphanumeric: true, allow_nil: false, if: :config_value_defined?
+              validates :config_description, alphanumeric: true, allow_nil: false, if: :config_description_defined?
+
+              validate do
+                allowed_value_data = Array(opt(:allowed_value_data))
+
+                if allowed_value_data.any?
+                  extra_keys = config.keys - allowed_value_data
+
+                  errors.add(:config, "uses invalid data keys: #{extra_keys.join(', ')}") if extra_keys.present?
+                else
+                  errors.add(:config, "must be a string")
+                end
+              end
+            end
+
+            def value
+              config_value.to_s
+            end
+
+            def value_with_data
+              { value: value, description: config_description }.compact
+            end
+
+            def config_value
+              @config[:value]
+            end
+
+            def config_description
+              @config[:description]
+            end
+
+            def config_value_defined?
+              config.key?(:value)
+            end
+
+            def config_description_defined?
+              config.key?(:description)
+            end
+          end
+
+          class UnknownStrategy < ::Gitlab::Config::Entry::Node
+            def errors
+              ["variable definition must be either a string or a hash"]
+            end
+          end
+        end
+      end
+    end
+  end
+end