//
// The error result returned by the function controls how [WalkDir]
// continues. If the function returns the special value [SkipDir], WalkDir
// skips the current directory (path if d.IsDir() is true, otherwise
// path's parent directory). If the function returns the special value
// [SkipAll], WalkDir skips all remaining files and directories. Otherwise,
// if the function returns a non-nil error, WalkDir stops entirely and
// returns that error.
//

	DiskID string
}

// supported FS for Nlink optimization in readdir.
const (
	xfs  = "XFS"
	ext4 = "EXT4"
)

// WalkDir will traverse a directory and return all entries found.
// On success a sorted meta cache stream will be returned.
// Metadata has data stripped, if any.
func (s *xlStorage) WalkDir(ctx context.Context, opts WalkDirOptions, wr io.Writer) (err error) {
	legacyFS := !(s.fsType == xfs || s.fsType == ext4)

	s.RLock()

//
// WalkDir does not follow symbolic links.
//
// WalkDir calls fn with paths that use the separator character appropriate
// for the operating system. This is unlike [io/fs.WalkDir], which always
// uses slash separated paths.
func WalkDir(root string, fn fs.WalkDirFunc) error {
	info, err := os.Lstat(root)
	if err != nil {
		err = fn(root, nil, err)
	} else {

        if (fileOrDirectory.exists()) {
            if (fileOrDirectory.isFile()) {
                processSingleFile(fileOrDirectory, visitor, spec, stopFlag);
            } else {
                walkDir(fileOrDirectory, path, visitor, spec, stopFlag);
            }
        } else {
            LOGGER.info("file or directory '{}', not found", fileOrDirectory);
        }
    }

		return "<" + err.Error() + ">"
	}
	return gofmtBuf.String()
}

func report(err error) {
	scanner.PrintError(os.Stderr, err)
	exitCode = 2
}

func walkDir(path string) {
	filepath.WalkDir(path, visitFile)
}

func visitFile(path string, f fs.DirEntry, err error) error {
	if err == nil && isGoFile(f) {
		err = processFile(path, false)
	}
	if err != nil {
		report(err)

	StatVol(ctx context.Context, volume string) (vol VolInfo, err error)
	DeleteVol(ctx context.Context, volume string, forceDelete bool) (err error)

	// WalkDir will walk a directory on disk and return a metacache stream on wr.
	WalkDir(ctx context.Context, opts WalkDirOptions, wr io.Writer) error

	// Metadata operations

		t.Fatal(err)
	}
}

func TestMapFSChmodDot(t *testing.T) {
	m := MapFS{
		"a/b.txt": &MapFile{Mode: 0666},
		".":       &MapFile{Mode: 0777 | fs.ModeDir},
	}
	buf := new(strings.Builder)
	fs.WalkDir(m, ".", func(path string, d fs.DirEntry, err error) error {
		fi, err := d.Info()
		if err != nil {
			return err
		}
		fmt.Fprintf(buf, "%s: %v\n", path, fi.Mode())
		return nil
	})
	want := `
.: drwxrwxrwx

	flag.Parse()
	args := flag.Args()
	if len(args) != 1 || !strings.HasSuffix(args[0], ".zip") {
		usage()
	}

	var zb bytes.Buffer
	zw := zip.NewWriter(&zb)
	seen := make(map[string]bool)
	err := filepath.WalkDir(".", func(path string, d fs.DirEntry, err error) error {
		if d.IsDir() {
			return nil
		}
		data, err := os.ReadFile(path)
		if err != nil {
			log.Fatal(err)
		}
		if strings.HasSuffix(path, ".zip") {

		check(t, Walk, td)
		check(t, Walk, filepath.Join(td, "dir"))
	})
	t.Run("WalkDir", func(t *testing.T) {
		WalkDir := func(root string) error { return filepath.WalkDir(td, walkDirFn) }
		check(t, WalkDir, td)
		check(t, WalkDir, filepath.Join(td, "dir"))
	})
}

func TestWalkSkipAllOnFile(t *testing.T) {
	td := t.TempDir()

		t.Skip("skipping; no GOROOT available")
	}

	goroot, err := filepath.EvalSymlinks(runtime.GOROOT())
	if err != nil {
		t.Fatal("error evaluating GOROOT: ", err)
	}
	var files []string
	err = filepath.WalkDir(goroot, func(path string, info fs.DirEntry, err error) error {
		if err != nil {
			return err
		}
		if !info.IsDir() && strings.HasSuffix(path, ".gz") {
			files = append(files, path)
		}
		return nil
	})