&& "".equals(artifact.getClassifier())
                && artifact.getPath() != null) {
            Path artifactPath = artifact.getPath();
            if (Files.isRegularFile(artifactPath)) {
                try (JarFile artifactJar = new JarFile(artifactPath.toFile(), false)) {
                    ZipEntry pluginDescriptorEntry = artifactJar.getEntry(PLUGIN_DESCRIPTOR_LOCATION);

        if (mavenOptions.altUserSettings().isPresent()) {
            userSettingsFile =
                    context.cwdResolver.apply(mavenOptions.altUserSettings().get());

            if (!Files.isRegularFile(userSettingsFile)) {
                throw new FileNotFoundException("The specified user settings file does not exist: " + userSettingsFile);
            }
        } else {

    }

    private
    fun zip(destZip: File, srcDir: File) {
        val srcPath = srcDir.toPath()
        Files.walk(srcPath).use { paths ->
            zip(destZip,
                paths.filter { Files.isRegularFile(it, LinkOption.NOFOLLOW_LINKS) }
                    .map { srcPath.relativize(it).toString() to it.toFile() }
                    .toList()
            )
        }
    }

    private

   * LinkOption...)} on input paths with the given link options.
   */
  public static Predicate<Path> isRegularFile(LinkOption... options) {
    final LinkOption[] optionsCopy = options.clone();
    return new Predicate<Path>() {
      @Override
      public boolean apply(Path input) {
        return Files.isRegularFile(input, optionsCopy);
      }

   * LinkOption...)} on input paths with the given link options.
   */
  public static Predicate<Path> isRegularFile(LinkOption... options) {
    final LinkOption[] optionsCopy = options.clone();
    return new Predicate<Path>() {
      @Override
      public boolean apply(Path input) {
        return Files.isRegularFile(input, optionsCopy);
      }

                Path path = topDirectory.resolve(stripLeadingAndTrailingQuotes(arg));
                if (Files.isDirectory(path)) {
                    topDirectory = path;
                } else if (Files.isRegularFile(path)) {
                    topDirectory = path.getParent();
                    if (!Files.isDirectory(topDirectory)) {
                        throw new ParserException("Directory " + topDirectory

                    try {
                        final Path path = Paths.get(LaServletContextUtil.getServletContext().getRealPath(key));
                        if (Files.isRegularFile(path)) {
                            return Files.getLastModifiedTime(path).toMillis();
                        }
                    } catch (final Exception e) {

                Path path = topDirectory.resolve(stripLeadingAndTrailingQuotes(arg));
                if (Files.isDirectory(path)) {
                    topDirectory = path;
                } else if (Files.isRegularFile(path)) {
                    topDirectory = path.getParent();
                    if (!Files.isDirectory(topDirectory)) {
                        System.err.println("Directory " + topDirectory