shouldWrite, err := shouldWriteFile(filepath.Join(oldTsDir, userVisiblePath), fileProjection.Data)
		if err != nil {
			return false, err
		}

		if shouldWrite {
			return true, nil
		}
	}

	return false, nil
}

// shouldWriteFile returns whether a new version of a file should be written to disk.
func shouldWriteFile(path string, content []byte) (bool, error) {