Reland "[ package:dds ] Add null safety support"

This reverts commit b8c5ecd.

TEST=N/A

Change-Id: I38bbebe1e38bc9dbfdde764eff847aafb3e39353
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/200926
Reviewed-by: Siva Annamalai <asiva@google.com>

Author: bkonyi

.dart_tool/package_config.json

@@ -11,7 +11,7 @@
     "constraint, update this by running tools/generate_package_config.dart."
   ],
   "configVersion": 2,
-  "generated": "2021-05-21T16:08:02.444059",
+  "generated": "2021-05-24T09:58:37.618570",
   "generator": "tools/generate_package_config.dart",
   "packages": [
     {
@@ -252,17 +252,11 @@
       "packageUri": "lib/",
       "languageVersion": "2.3"
     },
-    {
-      "name": "devtools_server",
-      "rootUri": "../third_party/devtools/devtools_server",
-      "packageUri": "lib/",
-      "languageVersion": "2.6"
-    },
     {
       "name": "devtools_shared",
       "rootUri": "../third_party/devtools/devtools_shared",
       "packageUri": "lib/",
-      "languageVersion": "2.3"
+      "languageVersion": "2.12"
     },
     {
       "name": "diagnostic",

DEPS

@@ -107,7 +107,7 @@ vars = {
 
   "chromedriver_tag": "83.0.4103.39",
   "dartdoc_rev" : "e6a9b7c536a85e49233c97bb892bbb0ab778e425",
-  "devtools_rev" : "12ad5341ae0a275042c84a4e7be9a6c98db65612",
+  "devtools_rev" : "e138d55437a59838607415ef21f20bd6c4955dbc",
   "jsshell_tag": "version:88.0",
   "ffi_rev": "f3346299c55669cc0db48afae85b8110088bf8da",
   "fixnum_rev": "16d3890c6dc82ca629659da1934e412292508bba",

pkg/dds/CHANGELOG.md

@@ -1,3 +1,7 @@
+# 2.0.0
+- **Breaking change:** add null safety support.
+- **Breaking change:** minimum Dart SDK revision bumped to 2.12.0.
+
 # 1.8.0
 - Add support for launching DevTools from DDS.
 - Fixed issue where two clients subscribing to the same stream in close succession

pkg/dds/bin/dds.dart

@@ -2,8 +2,6 @@
 // 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.
 
-// @dart=2.10
-
 import 'dart:convert';
 import 'dart:io';
 
@@ -28,7 +26,7 @@ Future<void> main(List<String> args) async {
   final remoteVmServiceUri = Uri.parse(args.first);
 
   // Resolve the address which is potentially provided by the user.
-  InternetAddress address;
+  late InternetAddress address;
   final addresses = await InternetAddress.lookup(args[1]);
   // Prefer IPv4 addresses.
   for (int i = 0; i < addresses.length; i++) {
@@ -43,7 +41,7 @@ Future<void> main(List<String> args) async {
   final disableServiceAuthCodes = args[3] == 'true';
 
   final startDevTools = args[4] == 'true';
-  Uri devToolsBuildDirectory;
+  Uri? devToolsBuildDirectory;
   if (args[5].isNotEmpty) {
     devToolsBuildDirectory = Uri.file(args[5]);
   }
@@ -55,7 +53,7 @@ Future<void> main(List<String> args) async {
       remoteVmServiceUri,
       serviceUri: serviceUri,
       enableAuthCodes: !disableServiceAuthCodes,
-      devToolsConfiguration: startDevTools
+      devToolsConfiguration: startDevTools && devToolsBuildDirectory != null
           ? DevToolsConfiguration(
               enable: startDevTools,
               customBuildDirectoryPath: devToolsBuildDirectory,

pkg/dds/example/example.dart

@@ -2,8 +2,6 @@
 // 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.
 
-// @dart=2.10
-
 import 'package:dds/dds.dart';
 import 'package:vm_service/vm_service_io.dart';
 

pkg/dds/lib/dds.dart

@@ -2,8 +2,6 @@
 // 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.
 
-// @dart=2.10
-
 /// A library used to spawn the Dart Developer Service, used to communicate
 /// with a Dart VM Service instance.
 library dds;
@@ -41,15 +39,12 @@ abstract class DartDevelopmentService {
   /// default.
   static Future<DartDevelopmentService> startDartDevelopmentService(
     Uri remoteVmServiceUri, {
-    Uri serviceUri,
+    Uri? serviceUri,
     bool enableAuthCodes = true,
     bool ipv6 = false,
-    DevToolsConfiguration devToolsConfiguration = const DevToolsConfiguration(),
+    DevToolsConfiguration? devToolsConfiguration,
     bool logRequests = false,
   }) async {
-    if (remoteVmServiceUri == null) {
-      throw ArgumentError.notNull('remoteVmServiceUri');
-    }
     if (remoteVmServiceUri.scheme != 'http') {
       throw ArgumentError(
         'remoteVmServiceUri must have an HTTP scheme. Actual: ${remoteVmServiceUri.scheme}',
@@ -65,12 +60,15 @@ abstract class DartDevelopmentService {
       // If provided an address to bind to, ensure it uses a protocol consistent
       // with that used to spawn DDS.
       final addresses = await InternetAddress.lookup(serviceUri.host);
-      final address = addresses.firstWhere(
-        (a) => (a.type ==
-            (ipv6 ? InternetAddressType.IPv6 : InternetAddressType.IPv4)),
-        orElse: () => null,
-      );
-      if (address == null) {
+
+      try {
+        // Check to see if there's a valid address.
+        addresses.firstWhere(
+          (a) => (a.type ==
+              (ipv6 ? InternetAddressType.IPv6 : InternetAddressType.IPv4)),
+        );
+      } on StateError {
+        // Could not find a valid address.
         throw ArgumentError(
           "serviceUri '$serviceUri' is not an IPv${ipv6 ? "6" : "4"} address.",
         );
@@ -115,24 +113,24 @@ abstract class DartDevelopmentService {
   /// [DartDevelopmentService] via HTTP.
   ///
   /// Returns `null` if the service is not running.
-  Uri get uri;
+  Uri? get uri;
 
   /// The [Uri] VM service clients can use to communicate with this
   /// [DartDevelopmentService] via server-sent events (SSE).
   ///
   /// Returns `null` if the service is not running.
-  Uri get sseUri;
+  Uri? get sseUri;
 
   /// The [Uri] VM service clients can use to communicate with this
   /// [DartDevelopmentService] via a [WebSocket].
   ///
   /// Returns `null` if the service is not running.
-  Uri get wsUri;
+  Uri? get wsUri;
 
   /// The HTTP [Uri] of the hosted DevTools instance.
   ///
   /// Returns `null` if DevTools is not running.
-  Uri get devToolsUri;
+  Uri? get devToolsUri;
 
   /// Set to `true` if this instance of [DartDevelopmentService] is accepting
   /// requests.
@@ -180,8 +178,8 @@ class DartDevelopmentServiceException implements Exception {
 
 class DevToolsConfiguration {
   const DevToolsConfiguration({
+    required this.customBuildDirectoryPath,
     this.enable = false,
-    this.customBuildDirectoryPath,
   });
 
   final bool enable;

pkg/dds/lib/src/binary_compatible_peer.dart

@@ -2,8 +2,6 @@
 // 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.
 
-// @dart=2.10
-
 import 'dart:async';
 import 'dart:convert';
 import 'dart:typed_data';

pkg/dds/lib/src/client.dart

@@ -2,8 +2,6 @@
 // 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.
 
-// @dart=2.10
-
 import 'dart:async';
 
 import 'package:json_rpc_2/json_rpc_2.dart' as json_rpc;
@@ -26,7 +24,7 @@ class DartDevelopmentServiceClient {
     WebSocketChannel ws,
     json_rpc.Peer vmServicePeer,
   ) : this._(
-          dds,
+          dds as DartDevelopmentServiceImpl,
           ws,
           vmServicePeer,
         );
@@ -36,7 +34,7 @@ class DartDevelopmentServiceClient {
     SseConnection sse,
     json_rpc.Peer vmServicePeer,
   ) : this._(
-          dds,
+          dds as DartDevelopmentServiceImpl,
           sse,
           vmServicePeer,
         );
@@ -167,7 +165,8 @@ class DartDevelopmentServiceClient {
         (parameters) => {
               'type': 'Size',
               'size': StreamManager
-                  .loggingRepositories[StreamManager.kLoggingStream].bufferSize,
+                  .loggingRepositories[StreamManager.kLoggingStream]!
+                  .bufferSize,
             });
 
     _clientPeer.registerMethod('setLogHistorySize', (parameters) {
@@ -177,7 +176,7 @@ class DartDevelopmentServiceClient {
           "'size' must be greater or equal to zero",
         );
       }
-      StreamManager.loggingRepositories[StreamManager.kLoggingStream]
+      StreamManager.loggingRepositories[StreamManager.kLoggingStream]!
           .resize(size);
       return RPCResponses.success;
     });
@@ -193,8 +192,8 @@ class DartDevelopmentServiceClient {
     });
 
     _clientPeer.registerMethod('getSupportedProtocols', (parameters) async {
-      final Map<String, dynamic> supportedProtocols =
-          await _vmServicePeer.sendRequest('getSupportedProtocols');
+      final Map<String, dynamic> supportedProtocols = (await _vmServicePeer
+          .sendRequest('getSupportedProtocols')) as Map<String, dynamic>;
       final ddsVersion = DartDevelopmentService.protocolVersion.split('.');
       final ddsProtocol = {
         'protocolName': 'DDS',
@@ -289,17 +288,17 @@ class DartDevelopmentServiceClient {
   String get defaultClientName => 'client$_id';
 
   /// The current name associated with this client.
-  String get name => _name;
+  String? get name => _name;
 
   // NOTE: this should not be called directly except from:
   //   - `ClientManager._clearClientName`
   //   - `ClientManager._setClientNameHelper`
-  set name(String n) => _name = n ?? defaultClientName;
-  String _name;
+  set name(String? n) => _name = n ?? defaultClientName;
+  String? _name;
 
   final DartDevelopmentServiceImpl dds;
   final StreamChannel connection;
   final Map<String, String> services = {};
   final json_rpc.Peer _vmServicePeer;
-  json_rpc.Peer _clientPeer;
+  late json_rpc.Peer _clientPeer;
 }

pkg/dds/lib/src/client_manager.dart

@@ -2,8 +2,6 @@
 // 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.
 
-// @dart=2.10
-
 import 'package:json_rpc_2/json_rpc_2.dart' as json_rpc;
 
 import 'client.dart';
@@ -98,7 +96,7 @@ class ClientManager {
       pauseTypeMask |= PauseTypeMasks.pauseOnExitMask;
     }
 
-    clientResumePermissions[client.name].permissionsMask = pauseTypeMask;
+    clientResumePermissions[client.name!]!.permissionsMask = pauseTypeMask;
     return RPCResponses.success;
   }
 
@@ -111,10 +109,10 @@ class ClientManager {
     _clearClientName(client);
     client.name = name.isEmpty ? client.defaultClientName : name;
     clientResumePermissions.putIfAbsent(
-      client.name,
+      client.name!,
       () => _ClientResumePermissions(),
     );
-    clientResumePermissions[client.name].clients.add(client);
+    clientResumePermissions[client.name!]!.clients.add(client);
   }
 
   /// Resets the client's name while also cleaning up resume permissions and
@@ -155,7 +153,7 @@ class ClientManager {
     }
   }
 
-  DartDevelopmentServiceClient findFirstClientThatHandlesService(
+  DartDevelopmentServiceClient? findFirstClientThatHandlesService(
       String service) {
     for (final client in clients) {
       if (client.services.containsKey(service)) {
@@ -173,7 +171,7 @@ class ClientManager {
 
   /// Mapping of client names to all clients of that name and their resume
   /// permissions.
-  final Map<String, _ClientResumePermissions> clientResumePermissions = {};
+  final Map<String?, _ClientResumePermissions> clientResumePermissions = {};
 
   final DartDevelopmentServiceImpl dds;
 }

pkg/dds/lib/src/constants.dart

@@ -2,8 +2,6 @@
 // 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.
 
-// @dart=2.10
-
 abstract class RPCResponses {
   static const success = <String, dynamic>{
     'type': 'Success',