// Copyright 2016 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. import 'package:package_config/packages_file.dart' as packages_file; import 'package:path/path.dart' as path; import '../base/file_system.dart'; const String kPackagesFileName = '.packages'; Map<String, Uri> _parse(String packagesPath) { List<int> source = fs.file(packagesPath).readAsBytesSync(); return packages_file.parse(source, new Uri.file(packagesPath)); } class PackageMap { PackageMap(this.packagesPath); static String get globalPackagesPath => _globalPackagesPath ?? kPackagesFileName; static set globalPackagesPath(String value) { _globalPackagesPath = value; } static bool get isUsingCustomPackagesPath => _globalPackagesPath != null; static String _globalPackagesPath; final String packagesPath; /// Load and parses the .packages file. void load() { _map ??= _parse(packagesPath); } Map<String, Uri> get map { load(); return _map; } Map<String, Uri> _map; /// Returns the path to [packageUri]. String pathForPackage(Uri packageUri) { assert(packageUri.scheme == 'package'); List<String> pathSegments = packageUri.pathSegments.toList(); String packageName = pathSegments.removeAt(0); Uri packageBase = map[packageName]; String packageRelativePath = path.joinAll(pathSegments); return packageBase.resolve(packageRelativePath).path; } String checkValid() { if (fs.isFileSync(packagesPath)) return null; String message = '$packagesPath does not exist.'; String pubspecPath = path.absolute(path.dirname(packagesPath), 'pubspec.yaml'); if (fs.isFileSync(pubspecPath)) message += '\nDid you run "flutter packages get" in this directory?'; else message += '\nDid you run this command from the same directory as your pubspec.yaml file?'; return message; } }