build_runner/lib/src/daemon/constants.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'dart:io';

import 'package:build_daemon/constants.dart';
import 'package:path/path.dart' as p;

String assetServerPortFilePath(String workingDirectory) =>
    p.join(daemonWorkspace(workingDirectory), '.asset_server_port');

/// Returns the port of the daemon asset server.
int assetServerPort(String workingDirectory) {
  var portFile = File(assetServerPortFilePath(workingDirectory));
  if (!portFile.existsSync()) {
    throw Exception('Unable to read daemon asset port file.');
  }
  return int.parse(portFile.readAsStringSync());
}