Move pub into sdk/lib/_internal.

utils/pub/lock_file.dart

-// Copyright (c) 2012, 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.
-
-library lock_file;
-
-import 'dart:json' as json;
-
-import 'package:yaml/yaml.dart';
-
-import 'io.dart';
-import 'package.dart';
-import 'source_registry.dart';
-import 'utils.dart';
-import 'version.dart';
-
-/// A parsed and validated `pubspec.lock` file.
-class LockFile {
-  /// The packages this lockfile pins.
-  Map<String, PackageId> packages;
-
-  LockFile._(this.packages);
-
-  LockFile.empty()
-    : packages = <String, PackageId>{};
-
-  /// Loads a lockfile from [filePath].
-  factory LockFile.load(String filePath, SourceRegistry sources) {
-    return LockFile._parse(filePath, readTextFile(filePath), sources);
-  }
-
-  /// Parses a lockfile whose text is [contents].
-  factory LockFile.parse(String contents, SourceRegistry sources) {
-    return LockFile._parse(null, contents, sources);
-  }
-
-  /// Parses the lockfile whose text is [contents].
-  static LockFile _parse(String filePath, String contents,
-      SourceRegistry sources) {
-    var packages = <String, PackageId>{};
-
-    if (contents.trim() == '') return new LockFile.empty();
-    var parsed = loadYaml(contents);
-
-    if (parsed.containsKey('packages')) {
-      var packageEntries = parsed['packages'];
-
-      packageEntries.forEach((name, spec) {
-        // Parse the version.
-        if (!spec.containsKey('version')) {
-          throw new FormatException('Package $name is missing a version.');
-        }
-        var version = new Version.parse(spec['version']);
-
-        // Parse the source.
-        if (!spec.containsKey('source')) {
-          throw new FormatException('Package $name is missing a source.');
-        }
-        var sourceName = spec['source'];
-        if (!sources.contains(sourceName)) {
-          throw new FormatException(
-              'Could not find a source named $sourceName.');
-        }
-        var source = sources[sourceName];
-
-        // Parse the description.
-        if (!spec.containsKey('description')) {
-          throw new FormatException('Package $name is missing a description.');
-        }
-        var description = spec['description'];
-        description = source.parseDescription(filePath, description,
-            fromLockFile: true);
-
-        var id = new PackageId(name, source, version, description);
-
-        // Validate the name.
-        if (name != id.name) {
-          throw new FormatException(
-            "Package name $name doesn't match ${id.name}.");
-        }
-
-        packages[name] = id;
-      });
-    }
-
-    return new LockFile._(packages);
-  }
-
-  /// Returns the serialized YAML text of the lock file.
-  String serialize() {
-    var packagesObj = <String, Map>{};
-    packages.forEach((name, id) {
-      packagesObj[name] = {
-        'version': id.version.toString(),
-        'source': id.source.name,
-        'description': id.description
-      };
-    });
-
-    // TODO(nweiz): Serialize using the YAML library once it supports
-    // serialization. For now, we use JSON, since it's a subset of YAML anyway.
-    return
-        '# Generated by pub\n'
-        '# See http://pub.dartlang.org/doc/glossary.html#lockfile\n'
-        '\n'
-        '${json.stringify({'packages': packagesObj})}\n';
-  }
-}