maintain method

Implementation

@override
Future<void> maintain(GeneratorContext context) async {
  final barrel = context.template.barrel;

  final exports = <String>{};

  for (final folder in barrel.exports) {
    final directory = Directory('${context.featurePath}/$folder');

    if (!directory.existsSync()) continue;

    final files = directory
        .listSync()
        .whereType<File>()
        .where((file) =>
            file.path.endsWith('.dart') &&
            !file.path.endsWith('.g.dart') &&
            !file.path.endsWith('.freezed.dart'))
        .toList()
      ..sort((a, b) => a.path.compareTo(b.path));

    for (final file in files) {
      final relative = file.path
          .replaceFirst('${context.featurePath}/', '')
          .replaceAll('\\', '/');
      exports.add("export '$relative';");
    }
  }

  final buffer = StringBuffer();

  buffer.writeln('// GENERATED CODE - DO NOT MODIFY BY HAND');
  buffer.writeln();

  for (final export in exports) {
    buffer.writeln(export);
  }

  final output = File('${context.featurePath}/${barrel.file}');
  await output.writeAsString('$buffer');
}