1 files changed, 25 insertions, 0 deletions
diff --git a/lib/gitlab/github_import/bulk_importing.rb b/lib/gitlab/github_import/bulk_importing.rb
new file mode 100644
index 00000000000..147597289cf
--- /dev/null
+++ b/lib/gitlab/github_import/bulk_importing.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module GithubImport
+    module BulkImporting
+      # Builds and returns an Array of objects to bulk insert into the
+      # database.
+      #
+      # enum - An Enumerable that returns the objects to turn into database
+      #        rows.
+      def build_database_rows(enum)
+        enum.each_with_object([]) do |(object, _), rows|
+          rows << build(object) unless already_imported?(object)
+        end
+      end
+
+      # Bulk inserts the given rows into the database.
+      def bulk_insert(model, rows, batch_size: 100)
+        rows.each_slice(batch_size) do |slice|
+          Gitlab::Database.bulk_insert(model.table_name, slice)
+        end
+      end
+    end
+  end
+end