0edc4d2a76
It was resulting in weird situations where the tool would dump an error message and stack but not quit, or would fail hard but then just hang. Instead, specifically catch errors you expect. As an example of this, there's one error we expect from the DartDependencySetBuilder, so we catch that one, turn it into a dedicated exception class, then in the caller catch that specific exception.
69 lines
2.1 KiB
Dart
69 lines
2.1 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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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, new Uri.file(packagesPath));
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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 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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