Future validate()

in lib/src/pattern_descriptor.dart [44:85]
36 lines of code
6 McCabe index (conditional complexity)

  Future<void> validate([String? parent]) async {
    var inSandbox = parent == null;
    parent ??= sandbox;
    var matchingEntries = await Directory(parent)
        .list()
        .map((entry) =>
            entry is File ? entry.resolveSymbolicLinksSync() : entry.path)
        .where((entry) => matchesAll(pattern, p.basename(entry)))
        .toList();
    matchingEntries.sort();

    var location = inSandbox ? 'sandbox' : '"${prettyPath(parent)}"';
    if (matchingEntries.isEmpty) {
      fail('No entries found in $location matching $_patternDescription.');
    }

    var results = await Future.wait(matchingEntries
        .map((entry) {
          var basename = p.basename(entry);
          return runZonedGuarded(() {
            return Result.capture(Future.sync(() async {
              await _fn(basename).validate(parent);
              return basename;
            }));
          }, (_, __) {
            // Validate may produce multiple errors, but we ignore all but the first
            // to avoid cluttering the user with many different errors from many
            // different un-matched entries.
          });
        })
        .whereType<Future<Result<String>>>()
        .toList());

    var successes = results.where((result) => result.isValue).toList();
    if (successes.isEmpty) {
      await waitAndReportErrors(results.map((result) => result.asFuture));
    } else if (successes.length > 1) {
      fail('Multiple valid entries found in $location matching '
          '$_patternDescription:\n'
          '${bullet(successes.map((result) => result.asValue!.value))}');
    }
  }