cleanup = func() {} // no cleanup by default

	var argLen int
	for _, arg := range cmd.Args {
		argLen += len(arg)
	}

	// If we're not approaching 32KB of args, just pass args normally.
	// (use 30KB instead to be conservative; not sure how accounting is done)
	if !useResponseFile(cmd.Path, argLen) {
		return
	}

	tf, err := os.CreateTemp("", "args")
	if err != nil {