Pattern mavenArtifactJar = Pattern.compile("maven-artifact-[\\d.]+(-SNAPSHOT)?\\.jar");

            @Override
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                String filename = file.getFileName().toString();
                if (mavenArtifactJar.matcher(filename).matches()) {

                        visitSymbolicLink(details);
                    } else if (details.isDirectory()) {
                        visitDirectory(details);
                    } else {
                        visitFile(details);
                    }
                }
            }

            private boolean isChildOfVisitedSymbolicLink(final FileCopyDetailsInternal details) {
                final File file;

                    check(Files.isDirectory(dir)) { "Must be a directory" }
                    Files.walkFileTree(dir, object : SimpleFileVisitor<Path>() {
                        override fun visitFile(file: Path, attrs: BasicFileAttributes): FileVisitResult {
                            val entryName = dir.relativize(file).joinToString(separator = "/") { it.toString() }

                var seenManifest: Boolean = false

                override fun preVisitDirectory(dir: Path?, attrs: BasicFileAttributes?) =
                    FileVisitResult.CONTINUE

                override fun visitFile(file: Path, attrs: BasicFileAttributes): FileVisitResult {
                    when {
                        file.isClassFilePath() -> {
                            visitClassFile(file)
                        }

        }

        private
        fun processDirectory(dir: Path, builder: Trie.Builder) {
            Files.walkFileTree(dir, object : SimpleFileVisitor<Path>() {
                override fun visitFile(file: Path, attrs: BasicFileAttributes): FileVisitResult {
                    val zipEntry = ZipEntry(dir.relativize(file).toString())
                    processEntry(zipEntry, builder)