initial null safe conversion of tool/plugin (#5454)

initial null safe conversion of tool/plugin

Author: devoncarew

resources/META-INF/plugin.xml

@@ -592,7 +592,7 @@
 <h2>38.2</h2>
 <ul>
   <li>Fix bug on Windows that prevented outlines from displaying</li>
-  <li>Restore the ability to run individual tests </li>
+  <li>Restore the ability to run individual tests</li>
   <li>Fix a couple other issues</li>
 </ul>
 <h2>38.1</h2>

tool/plugin/bin/main.dart

@@ -1,6 +1,8 @@
 // Copyright 2017 The Chromium Authors. All rights reserved. Use of this source
 // code is governed by a BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.10
+
 import 'dart:io';
 
 import 'package:plugin_tool/plugin.dart' as plugin;

tool/plugin/lib/artifact.dart

@@ -1,6 +1,8 @@
 // Copyright 2017 The Chromium Authors. All rights reserved. Use of this source
 // code is governed by a BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.10
+
 import 'dart:async';
 import 'dart:io';
 

tool/plugin/lib/build_spec.dart

@@ -1,6 +1,8 @@
 // Copyright 2017 The Chromium Authors. All rights reserved. Use of this source
 // code is governed by a BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.10
+
 import 'dart:async';
 import 'dart:io';
 

tool/plugin/lib/edit.dart

@@ -4,6 +4,8 @@
  * found in the LICENSE file.
  */
 
+// @dart = 2.10
+
 import 'dart:async';
 import 'dart:io';
 

tool/plugin/lib/globals.dart

@@ -1,6 +1,8 @@
 // Copyright 2017 The Chromium Authors. All rights reserved. Use of this source
 // code is governed by a BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.10
+
 // Map plugin ID to JetBrains registry ID.
 const Map<String, String> pluginRegistryIds = const {
   'io.flutter': '9212',

tool/plugin/lib/lint.dart

@@ -1,6 +1,8 @@
 // Copyright 2017 The Chromium Authors. All rights reserved. Use of this source
 // code is governed by a BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.10
+
 import 'dart:async';
 import 'dart:io';
 

tool/plugin/lib/plugin.dart

@@ -1,6 +1,8 @@
 // Copyright 2017 The Chromium Authors. All rights reserved. Use of this source
 // code is governed by a BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.10
+
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
@@ -184,7 +186,7 @@ Future<bool> performReleaseChecks(ProductCommand cmd) async {
     var gitDir = await GitDir.fromExisting(rootPath);
     var isClean = await gitDir.isWorkingTreeClean();
     if (isClean) {
-      var branch = await gitDir.getCurrentBranch();
+      var branch = await gitDir.currentBranch();
       var name = branch.branchName;
       var expectedName =
           cmd.isDevChannel ? 'master' : "release_${cmd.releaseMajor}";

tool/plugin/lib/runner.dart

@@ -1,6 +1,8 @@
 // Copyright 2017 The Chromium Authors. All rights reserved. Use of this source
 // code is governed by a BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.10
+
 import 'dart:async';
 import 'dart:io';
 

tool/plugin/lib/util.dart

@@ -1,6 +1,8 @@
 // Copyright 2017 The Chromium Authors. All rights reserved. Use of this source
 // code is governed by a BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.10
+
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';