Revert "Revert "Use native async/await support in pub.""

sdk/lib/_internal/pub_generated/lib/src/command.dart

Index: sdk/lib/_internal/pub_generated/lib/src/command.dart
diff --git a/sdk/lib/_internal/pub_generated/lib/src/command.dart b/sdk/lib/_internal/pub_generated/lib/src/command.dart
deleted file mode 100644
index 3724b408f1043292154d4a64815c93a0abc6351b..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub_generated/lib/src/command.dart
+++ /dev/null
@@ -1,96 +0,0 @@
-// 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 pub.command;
-
-import 'package:args/args.dart';
-import 'package:args/command_runner.dart';
-import 'package:path/path.dart' as path;
-
-import 'entrypoint.dart';
-import 'log.dart' as log;
-import 'global_packages.dart';
-import 'system_cache.dart';
-
-/// The base class for commands for the pub executable.
-///
-/// A command may either be a "leaf" command or it may be a parent for a set
-/// of subcommands. Only leaf commands are ever actually invoked. If a command
-/// has subcommands, then one of those must always be chosen.
-abstract class PubCommand extends Command {
-  SystemCache get cache {
-    if (_cache == null) {
-      _cache = new SystemCache.withSources(isOffline: isOffline);
-    }
-    return _cache;
-  }
-  SystemCache _cache;
-
-  GlobalPackages get globals {
-    if (_globals == null) {
-      _globals = new GlobalPackages(cache);
-    }
-    return _globals;
-  }
-  GlobalPackages _globals;
-
-  /// Gets the [Entrypoint] package for the current working directory.
-  ///
-  /// This will load the pubspec and fail with an error if the current directory
-  /// is not a package.
-  Entrypoint get entrypoint {
-    // Lazy load it.
-    if (_entrypoint == null) {
-      _entrypoint = new Entrypoint(
-          path.current,
-          cache,
-          packageSymlinks: globalResults['package-symlinks']);
-    }
-    return _entrypoint;
-  }
-  Entrypoint _entrypoint;
-
-  /// The URL for web documentation for this command.
-  String get docUrl => null;
-
-  /// Override this and return `false` to disallow trailing options from being
-  /// parsed after a non-option argument is parsed.
-  bool get allowTrailingOptions => true;
-
-  ArgParser get argParser {
-    // Lazily initialize the parser because the superclass constructor requires
-    // it but we want to initialize it based on [allowTrailingOptions].
-    if (_argParser == null) {
-      _argParser = new ArgParser(allowTrailingOptions: allowTrailingOptions);
-    }
-    return _argParser;
-  }
-  ArgParser _argParser;
-
-  /// Override this to use offline-only sources instead of hitting the network.
-  ///
-  /// This will only be called before the [SystemCache] is created. After that,
-  /// it has no effect. This only needs to be set in leaf commands.
-  bool get isOffline => false;
-
-  String get usageFooter {
-    if (docUrl == null) return null;
-    return "See $docUrl for detailed documentation.";
-  }
-
-  void printUsage() {
-    log.message(usage);
-  }
-
-  /// Parses a user-supplied integer [intString] named [name].
-  ///
-  /// If the parsing fails, prints a usage message and exits.
-  int parseInt(String intString, String name) {
-    try {
-      return int.parse(intString);
-    } on FormatException catch (_) {
-      usageException('Could not parse $name "$intString".');
-    }
-  }
-}