createFileExcluder function

bool Function(String) createFileExcluder(Iterable<String> patterns)

A test for the files a walk should not read, over the file's own name.

Implementation

bool Function(String) createFileExcluder(Iterable<String> patterns) {
  final exact = <String>{};
  final globs = <String>[];

  for (final pattern in patterns) {
    if (pattern.isEmpty) {
      continue;
    }

    if (pattern.contains('*')) {
      globs.add(pattern);
    } else {
      exact.add(pattern.toLowerCase());
    }
  }

  return (name) {
    final subject = name.toLowerCase();

    if (exact.contains(subject)) {
      return true;
    }

    for (final pattern in globs) {
      if (matchesNamePattern(subject, pattern)) {
        return true;
      }
    }

    return false;
  };
}