import 'dart:io';

/// Total byte size of all files below [dir]; `0` when it doesn't exist or
/// can't be listed.
Future<int> directorySize(Directory dir) async {
  var sum = 0;
  try {
    if (!dir.existsSync()) return 0;
    await for (final entity in dir.list(recursive: true, followLinks: false)) {
      if (entity is File) sum += await entity.length();
    }
  } on FileSystemException {
    // Files can vanish mid-walk (cache pruning); report what was counted.
  }
  return sum;
}