refactoring

Resolve #7779

packages/backend/src/misc/create-temp.ts

@@ -0,0 +1,10 @@
+import * as tmp from 'tmp';
+
+export function createTemp(): Promise<[string, any]> {
+	return new Promise<[string, any]>((res, rej) => {
+		tmp.file((e, path, fd, cleanup) => {
+			if (e) return rej(e);
+			res([path, cleanup]);
+		});
+	});
+}