static Future startWithDebugPort()

in lib/src/chrome.dart [77:139]
54 lines of code
7 McCabe index (conditional complexity)

  static Future<Chrome> startWithDebugPort(
    List<String> urls, {
    int debugPort = 0,
    bool headless = false,
    String? userDataDir,
    bool signIn = false,
  }) async {
    Directory dataDir;
    if (userDataDir == null) {
      signIn = false;
      dataDir = Directory.systemTemp.createTempSync();
    } else {
      dataDir = Directory(userDataDir);
    }
    final port = debugPort == 0 ? await findUnusedPort() : debugPort;
    final args = [
      // Using a tmp directory ensures that a new instance of chrome launches
      // allowing for the remote debug port to be enabled.
      '--user-data-dir=${dataDir.path}',
      '--remote-debugging-port=$port',
      // When the DevTools has focus we don't want to slow down the application.
      '--disable-background-timer-throttling',
      // Since we are using a temp profile, disable features that slow the
      // Chrome launch.
      if (!signIn) '--disable-extensions',
      '--disable-popup-blocking',
      if (!signIn) '--bwsi',
      '--no-first-run',
      '--no-default-browser-check',
      '--disable-default-apps',
      '--disable-translate',
      '--start-maximized',
    ];
    if (headless) {
      args.add('--headless');
    }

    final process = await _startProcess(urls, args: args);

    // Wait until the DevTools are listening before trying to connect.
    var _errorLines = <String>[];
    try {
      await process.stderr
          .transform(utf8.decoder)
          .transform(const LineSplitter())
          .firstWhere((line) {
        _errorLines.add(line);
        return line.startsWith('DevTools listening');
      }).timeout(Duration(seconds: 60));
    } catch (_) {
      throw Exception('Unable to connect to Chrome DevTools.\n\n'
              'Chrome STDERR:\n' +
          _errorLines.join('\n'));
    }

    return _connect(Chrome._(
      port,
      ChromeConnection('localhost', port),
      process: process,
      dataDir: dataDir,
      deleteDataDir: userDataDir == null,
    ));
  }