fun FileSystemOperations.removeOldVersionsFromDir(dir: Directory, shouldDelete: Spec<GradleVersion>, dirPrefix: String = "", dirSuffix: String = "") {
    if (dir.asFile.isDirectory) {
        for (cacheDir in dir.asFile.listFiles()) {
            val cacheDirName = cacheDir.name
            if (!cacheDirName.startsWith(dirPrefix) || !cacheDirName.endsWith(dirSuffix)) {
                continue
            }

    }

    private
    fun generateSubprojectsDirectories(): List<File> {
        val subprojectRoots = platformsFolder.asFile.listFiles(File::isDirectory).plus(subprojectsFolder.asFile).plus(testingFolder.asFile)
        return subprojectRoots.map { it.listFiles(File::isDirectory).asList() }.flatten()
    }

    private
    fun generateSubprojects(): List<GradleSubproject> {

    @Override
    void transform(TransformOutputs outputs) {
        File artifactFile = artifact.get().asFile
        if (artifactFile.name == 'gradle-dependencies') {
            (artifactFile.listFiles() as List<File>).sort { it.name }.each {
                outputs.file(it)
            }
        }
    }

            return new File[0];
        }
        final File libDir = new File(libPath);
        if (!libDir.exists()) {
            return new File[0];
        }
        return libDir.listFiles((file, name) -> name.startsWith(namePrefix));
    }

    public static File[] getPluginJarFiles(final String namePrefix) {
        return getPluginJarFiles((file, name) -> name.startsWith(namePrefix));
    }

            if (hasCleaned) {
                return
            }
            logger.lifecycle("Cleaning up caches...")
            val homeDir = parameters.homeDir.get()

            homeDir.asFile.listFiles()?.filter { it.name.startsWith("distributions-") }?.forEach {
                val workerDir = homeDir.dir(it.name)
                cleanupDistributionCaches(workerDir, GradleVersion.version(parameters.gradleVersion.get()))

    @InputDirectory
    abstract DirectoryProperty getJsonFileDirectory()

    @TaskAction
    void clean() {
        def jsonFileManager = new AcceptedApiChangesJsonFileManager()
        jsonFileDirectory.asFile.get().listFiles()
            ?.findAll { it.name.endsWith(".json") }
            ?.each { jsonFileManager.emptyAcceptedApiChanges(it) }
    }

      "$prefix/samples/guide/src/main/java/okhttp3/recipes",
      "$prefix/samples/guide/src/main/java/okhttp3/recipes/kt",
    ).map { File(it) }

  return directories.flatMap {
    it.listFiles().orEmpty().filter { f -> f.isFile }.toList()
  }
}

internal class MainTestProvider : SimpleProvider() {
  override fun arguments(): List<Any> {
    val mainFiles = mainFiles()
    return mainFiles.map {

    abstract val apiChangesDirectory: DirectoryProperty

    protected
    fun loadChanges(): Map<File, List<AcceptedApiChange>> {
        return apiChangesDirectory.get().asFile.listFiles()
            ?.filter {
                it.name.endsWith(".json")
            }?.associate {
                it to it.readAcceptedChanges()
            }?.filterValues {
                it.acceptedApiChanges != null

    @Override
    void transform(TransformOutputs outputs) {
        File baselineJarsDirectory = artifact.get().asFile
        if (baselineJarsDirectory.name == 'gradle-jars') {
            baselineJarsDirectory.listFiles().each {
                outputs.file(it)
            }
        }
    }

                    if (r < 0.333) {
                        f.exists();
//                      System.out.print('e');
                    } else if (r < 0.667) {
                        d.listFiles();
//                      System.out.print('l');
                    } else if (r < 1.0) {
                        InputStream in = f.getInputStream();
                        while (in.read(buf) > 0) {