}

    def "removes content on unsupported file systems at the end of the build"() {
        def watchableHierarchy = file("watchable").createDir()
        def watchableContent = watchableHierarchy.file("some/dir/file.txt").createFile()
        def unsupportedFileSystemMountPoint = watchableHierarchy.file("unsupported")
        def unwatchableContent = unsupportedFileSystemMountPoint.file("some/file.txt").createFile()

        when:

            ProcessGroovyMethodsExecute.execute(["some", "string"])
            ProcessGroovyMethodsExecute.execute(["some", "string"], ["array"] as String[], file("test"))
            ProcessGroovyMethodsExecute.execute(["some", "string"], ["array"], file("test"))

            execute("some string")
            execute("some string", ["array"] as String[], file("test"))
            execute("some string", ["array"], file("test"))

     * @param file to read
     * @return content of the file or the problem description in case file cannot be read.
     */
    public static String readFileQuietly(File file) {
        try {
            return readFile(file);
        } catch (Exception e) {
            return "Unable to read file '" + file + "' due to: " + e.toString();
        }
    }

    public static void writeFile(String content, File destination) {

        File file = new File(tempDirFile, "file-" + counter.incrementAndGet());
        boolean created = file.createNewFile();
        blackhole.consume(created);
    }

    @Benchmark
    public void createFileJava7(Blackhole blackhole) throws IOException {
        Path file = Files.createFile(tempDirPath.resolve("file-" + counter.incrementAndGet()));
        blackhole.consume(file);

        given:
        def dir = testDir.file("thing.dir")
        classesDir(dir)
        def file = testDir.file("thing.jar")
        jar(file)
        def dir2 = testDir.file("thing2.dir")
        classesDir(dir2)
        def file2 = testDir.file("thing2.jar")
        jar(file2)
        def dir3 = testDir.file("thing3.dir")
        classesDir(dir3)
        def file3 = testDir.file("thing3.jar")
        jar(file3)

        createParameterizedTransformWithSensitivity(DirectorySensitivity.DEFAULT)
        file('augmented').mkdir()
        file('augmented/a').mkdir()
        file('augmented/b').mkdir()
        file('augmented/b/b1').createFile()

        file('bar/foo').mkdir()
        file('bar/foo/c').mkdir()
        file('bar/foo/d').mkdir()
        file('bar/foo/d1').createFile()

        when:
        execute('showTransformedFiles')

        then:
        file('dest').assertHasDescendants('path/file.txt')
        file('dest/path/file.txt').text == 'f1'

        when:
        run 'copy'

        then:
        skipped(':copy')
        file('dest').assertHasDescendants('path/file.txt')
        file('dest/path/file.txt').text == 'f1'

        when:
        file('dir1/path/file.txt').text = 'new'
        run 'copy'

        def original = file.makeOlder().lastModified()

        when:
        touch(file)

        then:
        file.file
        file.lastModified() > original
        file.length() == 0
    }

    def "does not use fallback for touching non-empty files"() {
        given:
        def fileAttributeView = Stub(BasicFileAttributeView) {

        def file = tmpDir.file("file")
        file.text = "123"
        def link = tmpDir.file("link")
        link.createLink(file)
        def linkToLink = tmpDir.file("linkToLink")
        linkToLink.createLink(link)

        expect:
        def stat = accessor.stat(linkToLink)
        stat.type == FileType.RegularFile
        assertSameLastModified(stat, file)
        stat.length == 3

    private List<File> listDirs(File distDir) {
        if (!distDir.exists()) {
            return emptyList();
        }
        File[] files = distDir.listFiles();
        if (files == null) {
            return emptyList();
        }

        List<File> dirs = new ArrayList<File>();
        for (File file : files) {
            if (file.isDirectory()) {
                dirs.add(file);