1 files changed, 58 insertions, 0 deletions
diff --git a/lib/gitlab/config/entry/composable_array.rb b/lib/gitlab/config/entry/composable_array.rb
new file mode 100644
index 00000000000..e7ad259e826
--- /dev/null
+++ b/lib/gitlab/config/entry/composable_array.rb
@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Config
+    module Entry
+      ##
+      # Entry that represents a composable array definition
+      #
+      class ComposableArray < ::Gitlab::Config::Entry::Node
+        include ::Gitlab::Config::Entry::Validatable
+        include Gitlab::Utils::StrongMemoize
+
+        # TODO: Refactor `Validatable` code so that validations can apply to a child class
+        # See: https://gitlab.com/gitlab-org/gitlab/-/issues/263231
+        validations do
+          validates :config, type: Array
+        end
+
+        def compose!(deps = nil)
+          super do
+            @entries = Array(@entries)
+
+            # TODO: Isolate handling for a hash via: `[@config].flatten` to the `Needs` entry
+            # See: https://gitlab.com/gitlab-org/gitlab/-/issues/264376
+            [@config].flatten.each_with_index do |value, index|
+              raise ArgumentError, 'Missing Composable class' unless composable_class
+
+              composable_class_name = composable_class.name.demodulize.underscore
+
+              @entries << ::Gitlab::Config::Entry::Factory.new(composable_class)
+                .value(value)
+                .with(key: composable_class_name, parent: self, description: "#{composable_class_name} definition") # rubocop:disable CodeReuse/ActiveRecord
+                .create!
+            end
+
+            @entries.each do |entry|
+              entry.compose!(deps)
+            end
+          end
+        end
+
+        def value
+          @entries.map(&:value)
+        end
+
+        def descendants
+          @entries
+        end
+
+        def composable_class
+          strong_memoize(:composable_class) do
+            opt(:composable_class)
+          end
+        end
+      end
+    end
+  end
+end