Start pulling pub from its own repo.

sdk/lib/_internal/pub/lib/src/command/cache_repair.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.command.cache_repair;
-
-import 'dart:async';
-
-import '../command.dart';
-import '../exit_codes.dart' as exit_codes;
-import '../io.dart';
-import '../log.dart' as log;
-import '../source/cached.dart';
-import '../utils.dart';
-
-/// Handles the `cache repair` pub command.
-class CacheRepairCommand extends PubCommand {
-  String get name => "repair";
-  String get description => "Reinstall cached packages.";
-  String get invocation => "pub cache repair";
-  String get docUrl => "http://dartlang.org/tools/pub/cmd/pub-cache.html";
-  bool get takesArguments => false;
-
-  Future run() async {
-    var successes = 0;
-    var failures = 0;
-
-    // Repair every cached source.
-    for (var source in cache.sources) {
-      if (source is! CachedSource) continue;
-
-      var results = await source.repairCachedPackages();
-      successes += results.first;
-      failures += results.last;
-    }
-
-    if (successes > 0) {
-      var packages = pluralize("package", successes);
-      log.message("Reinstalled ${log.green(successes)} $packages.");
-    }
-
-    if (failures > 0) {
-      var packages = pluralize("package", failures);
-      log.message("Failed to reinstall ${log.red(failures)} $packages.");
-    }
-
-    var results = await globals.repairActivatedPackages();
-    if (results.first > 0) {
-      var packages = pluralize("package", results.first);
-      log.message("Reactivated ${log.green(results.first)} $packages.");
-    }
-
-    if (results.last > 0) {
-      var packages = pluralize("package", results.last);
-      log.message("Failed to reactivate ${log.red(results.last)} $packages.");
-    }
-
-    if (successes == 0 && failures == 0) {
-      log.message("No packages in cache, so nothing to repair.");
-    }
-
-    if (failures > 0) await flushThenExit(exit_codes.UNAVAILABLE);
-  }
-}