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

sdk/lib/_internal/pub_generated/test/descriptor/git.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 descriptor.git;
-
-import 'dart:async';
-
-import 'package:path/path.dart' as path;
-import 'package:scheduled_test/scheduled_test.dart';
-import 'package:scheduled_test/descriptor.dart';
-
-import '../../lib/src/git.dart' as git;
-
-/// Describes a Git repository and its contents.
-class GitRepoDescriptor extends DirectoryDescriptor {
-  GitRepoDescriptor(String name, List<Descriptor> contents)
-      : super(name, contents);
-
-  /// Creates the Git repository and commits the contents.
-  Future create([String parent]) => schedule(() {
-    return super.create(parent).then((_) {
-      return _runGitCommands(
-          parent,
-          [['init'], ['add', '.'], ['commit', '-m', 'initial commit']]);
-    });
-  }, 'creating Git repo:\n${describe()}');
-
-  /// Writes this descriptor to the filesystem, than commits any changes from
-  /// the previous structure to the Git repo.
-  ///
-  /// [parent] defaults to [defaultRoot].
-  Future commit([String parent]) => schedule(() {
-    return super.create(parent).then((_) {
-      return _runGitCommands(
-          parent,
-          [['add', '.'], ['commit', '-m', 'update']]);
-    });
-  }, 'committing Git repo:\n${describe()}');
-
-  /// Return a Future that completes to the commit in the git repository
-  /// referred to by [ref] at the current point in the scheduled test run.
-  ///
-  /// [parent] defaults to [defaultRoot].
-  Future<String> revParse(String ref, [String parent]) => schedule(() {
-    return _runGit(['rev-parse', ref], parent).then((output) => output[0]);
-  }, 'parsing revision $ref for Git repo:\n${describe()}');
-
-  /// Schedule a Git command to run in this repository.
-  ///
-  /// [parent] defaults to [defaultRoot].
-  Future runGit(List<String> args, [String parent]) => schedule(() {
-    return _runGit(args, parent);
-  }, "running 'git ${args.join(' ')}' in Git repo:\n${describe()}");
-
-  Future _runGitCommands(String parent, List<List<String>> commands) =>
-      Future.forEach(commands, (command) => _runGit(command, parent));
-
-  Future<List<String>> _runGit(List<String> args, String parent) {
-    // Explicitly specify the committer information. Git needs this to commit
-    // and we don't want to rely on the buildbots having this already set up.
-    var environment = {
-      'GIT_AUTHOR_NAME': 'Pub Test',
-      'GIT_AUTHOR_EMAIL': 'pub@dartlang.org',
-      'GIT_COMMITTER_NAME': 'Pub Test',
-      'GIT_COMMITTER_EMAIL': 'pub@dartlang.org'
-    };
-
-    if (parent == null) parent = defaultRoot;
-    return git.run(
-        args,
-        workingDir: path.join(parent, name),
-        environment: environment);
-  }
-}
-