1 files changed, 40 insertions, 0 deletions
diff --git a/lib/gitlab/ci/config/entry/caches.rb b/lib/gitlab/ci/config/entry/caches.rb
new file mode 100644
index 00000000000..75240599c9c
--- /dev/null
+++ b/lib/gitlab/ci/config/entry/caches.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    class Config
+      module Entry
+        ##
+        # Entry that represents caches configuration
+        #
+        class Caches < ::Gitlab::Config::Entry::ComposableArray
+          include ::Gitlab::Config::Entry::Validatable
+
+          MULTIPLE_CACHE_LIMIT = 4
+
+          validations do
+            validate do
+              unless config.is_a?(Hash) || config.is_a?(Array)
+                errors.add(:config, 'can only be a Hash or an Array')
+              end
+
+              if config.is_a?(Array) && config.count > MULTIPLE_CACHE_LIMIT
+                errors.add(:config, "no more than #{MULTIPLE_CACHE_LIMIT} caches can be created")
+              end
+            end
+          end
+
+          def initialize(*args)
+            super
+
+            @key = nil
+          end
+
+          def composable_class
+            Entry::Cache
+          end
+        end
+      end
+    end
+  end
+end