keertip@google.com
796a9f601a
Review URL: https://codereview.chromium.org//12133002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@17951 260f80e4-7a28-3924-810f-c04153c831b5
93 lines
2.8 KiB
Dart
93 lines
2.8 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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library lock_file;
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import 'dart:json' as json;
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import 'package.dart';
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import 'source_registry.dart';
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import 'utils.dart';
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import 'version.dart';
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import '../../pkg/yaml/lib/yaml.dart';
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/// A parsed and validated `pubspec.lock` file.
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class LockFile {
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/// The packages this lockfile pins.
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Map<String, PackageId> packages;
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LockFile._(this.packages);
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LockFile.empty()
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: packages = <String, PackageId>{};
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/// Parses the lockfile whose text is [contents].
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factory LockFile.parse(String contents, SourceRegistry sources) {
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var packages = <String, PackageId>{};
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if (contents.trim() == '') return new LockFile.empty();
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var parsed = loadYaml(contents);
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if (parsed.containsKey('packages')) {
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var packageEntries = parsed['packages'];
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packageEntries.forEach((name, spec) {
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// Parse the version.
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if (!spec.containsKey('version')) {
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throw new FormatException('Package $name is missing a version.');
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}
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var version = new Version.parse(spec['version']);
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// Parse the source.
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if (!spec.containsKey('source')) {
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throw new FormatException('Package $name is missing a source.');
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}
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var sourceName = spec['source'];
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if (!sources.contains(sourceName)) {
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throw new FormatException(
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'Could not find a source named $sourceName.');
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}
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var source = sources[sourceName];
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// Parse the description.
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if (!spec.containsKey('description')) {
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throw new FormatException('Package $name is missing a description.');
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}
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var description = spec['description'];
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source.validateDescription(description, fromLockFile: true);
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var id = new PackageId(name, source, version, description);
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// Validate the name.
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if (name != id.name) {
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throw new FormatException(
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"Package name $name doesn't match ${id.name}.");
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}
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packages[name] = id;
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});
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}
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return new LockFile._(packages);
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}
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/// Returns the serialized YAML text of the lock file.
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String serialize() {
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var packagesObj = <String, Map>{};
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packages.forEach((name, id) {
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packagesObj[name] = {
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'version': id.version.toString(),
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'source': id.source.name,
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'description': id.description
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};
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});
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// TODO(nweiz): Serialize using the YAML library once it supports
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// serialization. For now, we use JSON, since it's a subset of YAML anyway.
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return '''
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# Generated by pub. See: http://pub.dartlang.org/doc/glossary.html#lockfile
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${json.stringify({'packages': packagesObj})}
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''';
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}
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}
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