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()

    /**

            // 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 {

        val nodeName = nodeName(node, unit, file)
        return IncubatingDescription(
            name = nodeName,
            sourceRelativePath = repositoryRoot.relativize(file.toPath()),
            lineNumber = node.begin.map { it.line }.orElse(-1)
        )
    }

    private
    fun findVersionFromJavadoc(javadoc: Javadoc): String? =
        javadoc.blockTags

    }


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

                    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)

            Document document = entry.getValue();

            // Calculate the relative path from common root
            Path relativePath = commonRoot.relativize(originalPath);
            Path tempPomPath = tempDir.resolve(relativePath);

            // Ensure parent directories exist
            Files.createDirectories(tempPomPath.getParent());

            // Write POM to temp location
            writePomToFile(document, tempPomPath);

                }
            );
    }

    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 zipEntry = ZipEntry(dir.relativize(file).toString())
                    processEntry(zipEntry, builder)
                    return FileVisitResult.CONTINUE
                }
            })
        }

        @Throws(IOException::class)

                    Path locationPath = Paths.get(location).toAbsolutePath().normalize();
                    if (locationPath.startsWith(topDirectory)) {
                        locationPath = topDirectory.relativize(locationPath);
                    }
                    stringBuilder.append(" (").append(locationPath).append(")");
                }
            }

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

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