Generate the package spec from the lockfile.

lib/src/global_packages.dart

 // Copyright (c) 2014, 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 pub.global_packages;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:path/path.dart' as p;
 import 'package:barback/barback.dart';
 import 'package:pub_semver/pub_semver.dart';
 
 import 'barback/asset_environment.dart';
 import 'entrypoint.dart';
 import 'exceptions.dart';
 import 'executable.dart' as exe;
 import 'io.dart';
 import 'lock_file.dart';
 import 'log.dart' as log;
 import 'package.dart';
-import 'package_locations.dart';
 import 'pubspec.dart';
 import 'sdk.dart' as sdk;
 import 'solver/version_solver.dart';
 import 'source/cached.dart';
 import 'source/git.dart';
 import 'source/path.dart';
 import 'system_cache.dart';
 import 'utils.dart';
 
 /// Maintains the set of packages that have been globally activated.
@@ skipping 137 matching lines @@
     // Make sure all of the dependencies are locally installed.
     var ids = await Future.wait(result.packages.map(_cacheDependency));
     var lockFile = new LockFile(ids, cache.sources);
 
     // Load the package graph from [result] so we don't need to re-parse all
     // the pubspecs.
     var graph = await new Entrypoint.inMemory(root, lockFile, cache)
         .loadPackageGraph(result);
     var snapshots = await _precompileExecutables(graph.entrypoint, dep.name);
     _writeLockFile(dep.name, lockFile);
-    writePackagesMap(graph, _getPackagesFilePath(dep.name));
+    writeTextFile(_getPackagesFilePath(dep.name), lockFile.packagesFile());
 
     _updateBinStubs(graph.packages[dep.name], executables,
         overwriteBinStubs: overwriteBinStubs, snapshots: snapshots);
   }
 
   /// Precompiles the executables for [package] and saves them in the global
   /// cache.
   ///
   /// Returns a map from executable name to path for the snapshots that were
   /// successfully precompiled.
@@ skipping 594 matching lines @@
   }
 
   /// Returns the value of the property named [name] in the bin stub script
   /// [source].
   String _binStubProperty(String source, String name) {
     var pattern = new RegExp(quoteRegExp(name) + r": ([a-zA-Z0-9_-]+)");
     var match = pattern.firstMatch(source);
     return match == null ? null : match[1];
   }
 }