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