}
	data, err = robustio.ReadFile(file)
	if err != nil {
		return file, nil, errNotCached
	}
	return file, data, nil
}

// writeDiskStat writes a stat result cache entry.
// The file name must have been returned by a previous call to readDiskStat.
func writeDiskStat(ctx context.Context, file string, info *RevInfo) error {
	if file == "" {
		return nil
	}

	if info.Origin != nil {