Get flutter dir on PATH

get_flutter_dir.dart

import 'package:path/path.dart' as path;

String getFlutterBinFolderPath() {
  final pathString = Platform.environment['PATH'];

  if (pathString == null) {
    throw 'Flutter bin folder not located on PATH';
  }

  final flutterPath = pathString.split(';').firstWhere(
      (element) => path.canonicalize(element).contains('flutter\\bin'),
      orElse: () => throw 'Could not find a proper flutter/bin folder on PATH');

  return flutterPath;
}