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

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

Index: sdk/lib/_internal/pub_generated/lib/src/command/run.dart
diff --git a/sdk/lib/_internal/pub_generated/lib/src/command/run.dart b/sdk/lib/_internal/pub_generated/lib/src/command/run.dart
deleted file mode 100644
index 0d63daf12399cc68247414d6eb624e5e3c183bc7..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub_generated/lib/src/command/run.dart
+++ /dev/null
@@ -1,107 +0,0 @@
-// 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.run;
-
-import 'dart:async';
-
-import 'package:barback/barback.dart';
-import 'package:path/path.dart' as p;
-
-import '../command.dart';
-import '../executable.dart';
-import '../io.dart';
-import '../utils.dart';
-
-/// Handles the `run` pub command.
-class RunCommand extends PubCommand {
-  String get name => "run";
-  String get description =>
-      "Run an executable from a package.\n"
-          "NOTE: We are currently optimizing this command's startup time.";
-  String get invocation => "pub run <executable> [args...]";
-  bool get allowTrailingOptions => false;
-
-  RunCommand() {
-    argParser.addOption(
-        "mode",
-        help: 'Mode to run transformers in.\n'
-            '(defaults to "release" for dependencies, "debug" for ' 'entrypoint)');
-  }
-
-  Future run() {
-    final completer0 = new Completer();
-    scheduleMicrotask(() {
-      try {
-        join0() {
-          var package = entrypoint.root.name;
-          var executable = argResults.rest[0];
-          var args = argResults.rest.skip(1).toList();
-          join1() {
-            var mode;
-            join2() {
-              new Future.value(
-                  runExecutable(entrypoint, package, executable, args, mode: mode)).then((x0) {
-                try {
-                  var exitCode = x0;
-                  new Future.value(flushThenExit(exitCode)).then((x1) {
-                    try {
-                      x1;
-                      completer0.complete();
-                    } catch (e0, s0) {
-                      completer0.completeError(e0, s0);
-                    }
-                  }, onError: completer0.completeError);
-                } catch (e1, s1) {
-                  completer0.completeError(e1, s1);
-                }
-              }, onError: completer0.completeError);
-            }
-            if (argResults['mode'] != null) {
-              mode = new BarbackMode(argResults['mode']);
-              join2();
-            } else {
-              join3() {
-                join2();
-              }
-              if (package == entrypoint.root.name) {
-                mode = BarbackMode.DEBUG;
-                join3();
-              } else {
-                mode = BarbackMode.RELEASE;
-                join3();
-              }
-            }
-          }
-          if (executable.contains(":")) {
-            var components = split1(executable, ":");
-            package = components[0];
-            executable = components[1];
-            join4() {
-              join1();
-            }
-            if (p.split(executable).length > 1) {
-              usageException(
-                  "Cannot run an executable in a subdirectory of a " + "dependency.");
-              join4();
-            } else {
-              join4();
-            }
-          } else {
-            join1();
-          }
-        }
-        if (argResults.rest.isEmpty) {
-          usageException("Must specify an executable to run.");
-          join0();
-        } else {
-          join0();
-        }
-      } catch (e, s) {
-        completer0.completeError(e, s);
-      }
-    });
-    return completer0.future;
-  }
-}