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
            }

        Path dir = fs.getPath("dir");
        assertEquals(6, MoreFiles.listFiles(dir).size());

        method.delete(dir);
        method.assertDeleteSucceeded(dir);

        assertEquals(
            "contents of /dontdelete deleted by delete method " + method,
            3,
            MoreFiles.listFiles(fs.getPath("/dontdelete")).size());
      }
    }
  }

        Path dir = fs.getPath("dir");
        assertEquals(6, MoreFiles.listFiles(dir).size());

        method.delete(dir);
        method.assertDeleteSucceeded(dir);

        assertEquals(
            "contents of /dontdelete deleted by delete method " + method,
            3,
            MoreFiles.listFiles(fs.getPath("/dontdelete")).size());
      }
    }
  }

    }

    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> {

                SmbFile[] dirs = f.listFiles(new DosFileFilter("*", SmbConstants.ATTR_DIRECTORY));
                assertNotNull(dirs);
                assertEquals(1, dirs.length);

                if ( haveHidden && !Boolean.parseBoolean(getProperties().getOrDefault("test.skip.hidden", "false")) ) {
                    SmbFile[] hidden = f.listFiles(new DosFileFilter("*", SmbConstants.ATTR_HIDDEN));

        val subprojectRoots = File("../platforms").listFiles(File::isDirectory).plus(File("../subprojects"))
        val subProjectFolders = subprojectRoots.map { it.listFiles(File::isDirectory).asList() }.flatten().filter { dir ->
            // filter out the directories that have only a `build` subdirectory - this usually happens after branch switching
            dir.listFiles { _: File, name: String -> name != "build" }!!.isNotEmpty()
        }

    @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()))

 * of the resource URL
 */

    public SmbFile[] listFiles( String wildcard ) throws SmbException {
        return listFiles( wildcard, ATTR_DIRECTORY | ATTR_HIDDEN | ATTR_SYSTEM, null, null );
    }
/**
 * List the contents of this SMB resource. The list returned will be
 * identical to the list returned by the parameterless <code>listFiles()</code>
 * method minus files filtered by the specified filename filter.