val dirPath = dir.toPath()
            Files.walk(dirPath).use { paths ->
                paths.filter { !it.toFile().isDirectory }
                    .limit(4)
                    .map { dirPath.relativize(it).toString() }
                    .collect(Collectors.toList())
            }
        }?.filter {
            it.value.isNotEmpty()
        } ?: emptyMap()

    /**

    }


    private
    fun generateSubproject(subprojectDir: File): GradleSubproject {
        return GradleSubproject(
            subprojectDir.name,
            rootPath.relativize(subprojectDir.toPath()).invariantSeparatorsPathString,
            subprojectDir.hasDescendantDir("src/test"),
            subprojectDir.hasDescendantDir("src/integTest"),

            // getting_started.adoc -> getting_started-docinfo.html
            String docInfoName = adocFileName.substring(0, adocFileName.lastIndexOf('.')) + "-docinfo.html";
            String relativePath = adocDir.relativize(adocFile.toPath()).toString();
            File docInfo = new File(destinationDirectory, docInfoName);
            try {

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

        @Throws(IOException::class)

                }
            );
    }

    private static URI toUri(File projectRootDir, File file, String commitId) {
        try {
            URI relativeLocation = projectRootDir.toURI().relativize(file.toURI());
            return new URI("https://github.com/gradle/gradle/blob/" + commitId + "/" + relativeLocation);
        } catch (URISyntaxException e) {
            throw new RuntimeException(e);
        }

                    Files.walkFileTree(dir, object : SimpleFileVisitor<Path>() {
                        override fun visitFile(file: Path, attrs: BasicFileAttributes): FileVisitResult {
                            val entryName = dir.relativize(file).joinToString(separator = "/") { it.toString() }
                            jarStream.putNextEntry(JarEntry(entryName))
                            Files.copy(file, jarStream)

                Path topDirectory = session.getTopDirectory();
                if (topDirectory != null && current.startsWith(topDirectory)) {
                    current = topDirectory.relativize(current);
                }
                logger.info("  from " + current);
            }

            // ----------[ packaging ]----------

        }
        return packaged;
    }

    private Path relativizeOutputFile(final Path outputFile) {
        Path rootDirectory = session.getRequest().getRootDirectory();
        return rootDirectory.relativize(outputFile);
    }

    /**
     * Tries to resolve the specified artifact from the artifacts of the given project.
     *

            try (Stream<Path> paths = Files.walk(basePath)) {
                paths.filter(path -> path.toFile().getName().endsWith(imageExtention)).forEach(path -> {
                    final Path subPath = basePath.relativize(path);
                    final String docId = subPath.toString().replace("/", StringUtil.EMPTY).replace(suffix, StringUtil.EMPTY);
                    if (!docId.startsWith("_")) {

     * PUTs the source file (must exist as file) to target URI. The target MUST BE relative from the
     * {@link RemoteRepository#getUrl()} root.
     *
     * @throws RuntimeException If PUT fails for any reason.
     */
    void put(@Nonnull Path source, @Nonnull URI relativeTarget);

    /**
     * PUTs the source byte array to target URI. The target MUST BE relative from the
     * {@link RemoteRepository#getUrl()} root.
     *