return r.repo(ctx).GoMod(ctx, version)
	}
	text, err := r.gomodCache.Do(version, func() ([]byte, error) {
		file, text, err := readDiskGoMod(ctx, r.path, version)
		if err == nil {
			// Note: readDiskGoMod already called checkGoMod.
			return text, nil
		}

		text, err = r.repo(ctx).GoMod(ctx, version)
		if err == nil {