Windows Directory.watch continues incorrectly after directory move

[davidmorgan]

Related to https://github.com/dart-lang/sdk/issues/62193

If the watched directory is moved, no indication is given on the event stream; it continues to emit events about the new path, but with wrong paths still rooted in the old path.

import 'dart:io';

Future<void> main() async {
  final temp = Directory.systemTemp.createTempSync();

  final dir = Directory('${temp.path}\\dir')..createSync();
  dir.watch(recursive: true).listen(
    (e) => print('data $e'),
    onError: (e, s) => print('onError: $e $s'),
    onDone: () => print('onDone'));

  await Future.delayed(Duration(milliseconds: 200));
  dir.renameSync('${temp.path}\\newdir');

  for (var i = 0; i != 5; ++i) {
    File('${temp.path}\\newdir\\f$i').createSync();
    await Future.delayed(Duration(milliseconds: 200));
  }
}

prints paths with "dir" instead of "newdir".

package:watcher already works around this by watching the parent directory of the watched directory in order to detect moves+deletes.