Move pub into sdk/lib/_internal.

utils/pub/command_cache.dart

-// Copyright (c) 2013, 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 command_cache;
-
-import 'dart:async';
-import 'dart:io';
-import 'dart:json' as json;
-
-import 'exit_codes.dart' as exit_codes;
-import 'log.dart' as log;
-import 'pub.dart';
-
-
-/// Handles the `cache` pub command.
-class CacheCommand extends PubCommand {
-  String get description => "Inspect the system cache.";
-  String get usage => 'pub cache list';
-  bool get requiresEntrypoint => false;
-
-  Future onRun() {
-    if (commandOptions.rest.length != 1) {
-      log.error('The cache command expects one argument.');
-      this.printUsage();
-      exit(exit_codes.USAGE);
-    }
-
-    if ((commandOptions.rest[0] != 'list')) {
-      log.error('Unknown cache command "${commandOptions.rest[0]}".');
-      this.printUsage();
-      exit(exit_codes.USAGE);
-    }
-
-    // TODO(keertip): Add flag to list packages from non default sources
-    var packagesObj = <String, Map>{};
-    for (var package in cache.sources.defaultSource.getCachedPackages()) {
-      packagesObj[package.name] = {
-        'version': package.version.toString(),
-        'location': package.dir
-      };
-    }
-
-    // TODO(keertip): Add support for non-JSON format
-    // and check for --format flag
-    log.message(json.stringify({'packages': packagesObj}));
-  }
-}
-