// explicitly setting that. Otherwise it might get out of sync with FindFirstFile. See golang.org/issues/42637.
	if err := filepath.WalkDir(path, func(path string, d fs.DirEntry, err error) error {
		if err != nil {
			t.Fatal(err)
		}
		info, err := d.Info()
		if err != nil {
			t.Fatal(err)
		}

	if !*testWork {
		removeAll(testTmpDir) // os.Exit won't run defer
	}

	if !*testWork {
		// There shouldn't be anything left in topTmpdir.
		var extraFiles, extraDirs []string
		err := filepath.WalkDir(topTmpdir, func(path string, d fs.DirEntry, err error) error {
			if err != nil {
				return err
			}
			if path == topTmpdir {
				return nil
			}

// they are all added to the returned slice.
func loadObjects(dir string) []*unstructured.Unstructured {
	result := []*unstructured.Unstructured{}
	err := filepath.WalkDir(dir, func(path string, d fs.DirEntry, err error) error {
		if err != nil {
			return err
		} else if d.IsDir() {
			return nil
		} else if filepath.Ext(d.Name()) != ".yaml" {
			return nil
		}

	if err != nil {
		return fmt.Errorf("failed to marshal base config: %w", err)
	}
	// Walk through the drop-in directory and update the configuration for each file
	if err := filepath.WalkDir(kubeletDropInConfigDir, func(path string, info fs.DirEntry, err error) error {
		if err != nil {
			return err
		}
		if !info.IsDir() && filepath.Ext(info.Name()) == dropinFileExtension {

			bdst.WriteByte(0)
		}
	}
	writefile(bdst.String(), dst, 0)
}

func clean() {
	generated := []byte(generatedHeader)

	// Remove generated source files.
	filepath.WalkDir(pathf("%s/src", goroot), func(path string, d fs.DirEntry, err error) error {
		switch {
		case err != nil:
			// ignore
		case d.IsDir() && (d.Name() == "vendor" || d.Name() == "testdata"):

		mode os.FileMode
	}
	var dirs []pathMode // in lexical order

	undo = func() {
		for i := range dirs {
			os.Chmod(dirs[i].path, dirs[i].mode) // best effort
		}
	}

	filepath.WalkDir(dir, func(path string, d fs.DirEntry, err error) error {
		if suffix := strings.TrimPrefix(path, dir+string(filepath.Separator)); suffix != "" {
			if suffix == ".git" {

	if err := os.MkdirAll(dstRoot, 0777); err != nil {
		return err
	}

	srcRoot, err := filepath.Abs(srcRoot)
	if err != nil {
		return err
	}

	return filepath.WalkDir(srcRoot, func(srcPath string, d fs.DirEntry, err error) error {
		if err != nil || srcPath == srcRoot {
			return err
		}

		suffix := strings.TrimPrefix(srcPath, srcRoot)