1 files changed, 24 insertions, 0 deletions
diff --git a/lib/bulk_imports/uniquify.rb b/lib/bulk_imports/uniquify.rb
new file mode 100644
index 00000000000..a4290eb86bf
--- /dev/null
+++ b/lib/bulk_imports/uniquify.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+module BulkImports
+  module Uniquify
+    private
+
+    def uniquify(namespace, data_item, data_type)
+      return data_item unless namespace.present?
+
+      children_items = Set.new
+
+      # index_namespaces_on_parent_id_and_id index supports this
+      Namespace.by_parent(namespace).each_batch do |relation|
+        children_items.merge(relation.pluck(data_type).to_set) # rubocop: disable CodeReuse/ActiveRecord
+      end
+
+      return data_item unless children_items.include?(data_item)
+
+      data_item = Gitlab::Utils::Uniquify.new(1).string(->(counter) { "#{data_item}_#{counter}" }) do |base|
+        children_items.include?(base)
+      end
+    end
+  end
+end