}

    protected void parseProjectProperties(final Path propPath) {
        try (final InputStream in = Files.newInputStream(propPath)) {
            final Properties prop = new Properties();
            prop.load(in);
            version = prop.getProperty("fess.version", "0.0.0");
            final String[] values = version.split("\\.");

        if (extensionsFile != null) {
            Path extensionsPath = Path.of(extensionsFile);
            if (Files.exists(extensionsPath)) {
                try (InputStream is = Files.newInputStream(extensionsPath)) {
                    return new CoreExtensionsStaxReader().read(is, true).getExtensions();
                }
            }
        }
        return List.of();
    }