1 files changed, 30 insertions, 0 deletions
diff --git a/lib/gitlab/ci/config/entry/tags.rb b/lib/gitlab/ci/config/entry/tags.rb
new file mode 100644
index 00000000000..ca3b48372e2
--- /dev/null
+++ b/lib/gitlab/ci/config/entry/tags.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    class Config
+      module Entry
+        ##
+        # Entry that represents an array of tags.
+        #
+        class Tags < ::Gitlab::Config::Entry::Node
+          include ::Gitlab::Config::Entry::Validatable
+
+          TAGS_LIMIT = 50
+
+          validations do
+            validates :config, array_of_strings: true
+
+            validate do
+              next unless ::Feature.enabled?(:ci_build_tags_limit, default_enabled: :yaml)
+
+              if config.is_a?(Array) && config.size >= TAGS_LIMIT
+                errors.add(:config, _("must be less than the limit of %{tag_limit} tags") % { tag_limit: TAGS_LIMIT })
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end