Migrate xcode.dart and xcode_validator.dart to null safety (#80614)

packages/flutter_tools/lib/src/commands/clean.dart

@@ -9,7 +9,7 @@ import 'package:meta/meta.dart';
 import '../base/file_system.dart';
 import '../base/logger.dart';
 import '../build_info.dart';
-import '../globals.dart' as globals;
+import '../globals_null_migrated.dart' as globals;
 import '../ios/xcodeproj.dart';
 import '../project.dart';
 import '../runner/flutter_command.dart';

packages/flutter_tools/lib/src/globals.dart

@@ -12,12 +12,10 @@ import 'device.dart';
 import 'doctor.dart';
 import 'fuchsia/fuchsia_sdk.dart';
 import 'globals_null_migrated.dart' as globals;
-import 'ios/ios_workflow.dart';
 import 'ios/simulators.dart';
 import 'macos/cocoapods.dart';
 import 'macos/cocoapods_validator.dart';
 import 'macos/xcdevice.dart';
-import 'macos/xcode.dart';
 import 'project.dart';
 import 'reporting/crash_reporting.dart';
 import 'runner/local_engine.dart';
@@ -44,8 +42,6 @@ LocalEngineLocator get localEngineLocator => context.get<LocalEngineLocator>();
 CocoaPods get cocoaPods => context.get<CocoaPods>();
 FuchsiaArtifacts get fuchsiaArtifacts => context.get<FuchsiaArtifacts>();
 IOSSimulatorUtils get iosSimulatorUtils => context.get<IOSSimulatorUtils>();
-IOSWorkflow get iosWorkflow => context.get<IOSWorkflow>();
-Xcode get xcode => context.get<Xcode>();
 
 XCDevice get xcdevice => context.get<XCDevice>();
 

packages/flutter_tools/lib/src/globals_null_migrated.dart

@@ -23,8 +23,10 @@ import 'base/terminal.dart';
 import 'base/time.dart';
 import 'base/user_messages.dart';
 import 'cache.dart';
+import 'ios/ios_workflow.dart';
 import 'ios/plist_parser.dart';
 import 'ios/xcodeproj.dart';
+import 'macos/xcode.dart';
 import 'persistent_tool_state.dart';
 import 'reporting/reporting.dart';
 import 'version.dart';
@@ -40,6 +42,8 @@ AndroidSdk? get androidSdk => context.get<AndroidSdk>();
 FlutterVersion get flutterVersion => context.get<FlutterVersion>()!;
 Usage get flutterUsage => context.get<Usage>()!;
 XcodeProjectInterpreter? get xcodeProjectInterpreter => context.get<XcodeProjectInterpreter>();
+Xcode? get xcode => context.get<Xcode>();
+IOSWorkflow? get iosWorkflow => context.get<IOSWorkflow>();
 
 PersistentToolState? get persistentToolState => PersistentToolState.instance;
 

packages/flutter_tools/lib/src/ios/ios_emulators.dart

@@ -7,7 +7,7 @@
 import '../base/process.dart';
 import '../device.dart';
 import '../emulator.dart';
-import '../globals.dart' as globals;
+import '../globals_null_migrated.dart' as globals;
 import 'simulators.dart';
 
 class IOSEmulators extends EmulatorDiscovery {

packages/flutter_tools/lib/src/ios/ios_workflow.dart

@@ -2,10 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
-import 'package:meta/meta.dart';
-
 import '../base/platform.dart';
 import '../doctor_validator.dart';
 import '../features.dart';
@@ -13,9 +9,9 @@ import '../macos/xcode.dart';
 
 class IOSWorkflow implements Workflow {
   const IOSWorkflow({
-    @required Platform platform,
-    @required FeatureFlags featureFlags,
-    @required Xcode xcode,
+    required Platform platform,
+    required FeatureFlags featureFlags,
+    required Xcode xcode,
   }) : _platform = platform,
        _featureFlags = featureFlags,
        _xcode = xcode;

packages/flutter_tools/lib/src/ios/mac.dart

@@ -18,7 +18,7 @@ import '../base/utils.dart';
 import '../build_info.dart';
 import '../cache.dart';
 import '../flutter_manifest.dart';
-import '../globals.dart' as globals;
+import '../globals_null_migrated.dart' as globals;
 import '../macos/cocoapod_utils.dart';
 import '../macos/xcode.dart';
 import '../project.dart';

packages/flutter_tools/lib/src/ios/simulators.dart

@@ -22,7 +22,7 @@ import '../convert.dart';
 import '../devfs.dart';
 import '../device.dart';
 import '../device_port_forwarder.dart';
-import '../globals.dart' as globals;
+import '../globals_null_migrated.dart' as globals;
 import '../macos/xcode.dart';
 import '../project.dart';
 import '../protocol_discovery.dart';

packages/flutter_tools/lib/src/macos/xcode.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
 import 'dart:async';
 
 import 'package:file/memory.dart';
@@ -41,11 +39,11 @@ String getSDKNameForIOSEnvironmentType(EnvironmentType environmentType) {
 /// A utility class for interacting with Xcode command line tools.
 class Xcode {
   Xcode({
-    @required Platform platform,
-    @required ProcessManager processManager,
-    @required Logger logger,
-    @required FileSystem fileSystem,
-    @required XcodeProjectInterpreter xcodeProjectInterpreter,
+    required Platform platform,
+    required ProcessManager processManager,
+    required Logger logger,
+    required FileSystem fileSystem,
+    required XcodeProjectInterpreter xcodeProjectInterpreter,
   })  : _platform = platform,
         _fileSystem = fileSystem,
         _xcodeProjectInterpreter = xcodeProjectInterpreter,
@@ -58,10 +56,10 @@ class Xcode {
   /// buffer logger, and test [XcodeProjectInterpreter].
   @visibleForTesting
   factory Xcode.test({
-    @required ProcessManager processManager,
-    XcodeProjectInterpreter xcodeProjectInterpreter,
-    Platform platform,
-    FileSystem fileSystem,
+    required ProcessManager processManager,
+    XcodeProjectInterpreter? xcodeProjectInterpreter,
+    Platform? platform,
+    FileSystem? fileSystem,
   }) {
     platform ??= FakePlatform(
       operatingSystem: 'macos',
@@ -83,8 +81,8 @@ class Xcode {
 
   bool get isInstalledAndMeetsVersionCheck => _platform.isMacOS && isInstalled && isRequiredVersionSatisfactory;
 
-  String _xcodeSelectPath;
-  String get xcodeSelectPath {
+  String? _xcodeSelectPath;
+  String? get xcodeSelectPath {
     if (_xcodeSelectPath == null) {
       try {
         _xcodeSelectPath = _processUtils.runSync(
@@ -101,11 +99,11 @@ class Xcode {
 
   bool get isInstalled => _xcodeProjectInterpreter.isInstalled;
 
-  Version get currentVersion => _xcodeProjectInterpreter.version;
+  Version? get currentVersion => _xcodeProjectInterpreter.version;
 
-  String get versionText => _xcodeProjectInterpreter.versionText;
+  String? get versionText => _xcodeProjectInterpreter.versionText;
 
-  bool _eulaSigned;
+  bool? _eulaSigned;
   /// Has the EULA been signed?
   bool get eulaSigned {
     if (_eulaSigned == null) {
@@ -124,10 +122,10 @@ class Xcode {
         _eulaSigned = false;
       }
     }
-    return _eulaSigned;
+    return _eulaSigned ?? false;
   }
 
-  bool _isSimctlInstalled;
+  bool? _isSimctlInstalled;
 
   /// Verifies that simctl is installed by trying to run it.
   bool get isSimctlInstalled {
@@ -143,21 +141,23 @@ class Xcode {
         _isSimctlInstalled = false;
       }
     }
-    return _isSimctlInstalled;
+    return _isSimctlInstalled ?? false;
   }
 
   bool get isRequiredVersionSatisfactory {
-    if (!_xcodeProjectInterpreter.isInstalled) {
+    final Version? version = currentVersion;
+    if (version == null) {
       return false;
     }
-    return currentVersion >= xcodeRequiredVersion;
+    return version >= xcodeRequiredVersion;
   }
 
   bool get isRecommendedVersionSatisfactory {
-    if (!_xcodeProjectInterpreter.isInstalled) {
+    final Version? version = currentVersion;
+    if (version == null) {
       return false;
     }
-    return currentVersion >= xcodeRecommendedVersion;
+    return version >= xcodeRecommendedVersion;
   }
 
   /// See [XcodeProjectInterpreter.xcrunCommand].
@@ -188,21 +188,17 @@ class Xcode {
     return runResult.stdout.trim();
   }
 
-  String getSimulatorPath() {
-    if (xcodeSelectPath == null) {
+  String? getSimulatorPath() {
+    final String? selectPath = xcodeSelectPath;
+    if (selectPath == null) {
       return null;
     }
-    final List<String> searchPaths = <String>[
-      _fileSystem.path.join(xcodeSelectPath, 'Applications', 'Simulator.app'),
-    ];
-    return searchPaths.where((String p) => p != null).firstWhere(
-      (String p) => _fileSystem.directory(p).existsSync(),
-      orElse: () => null,
-    );
+    final String appPath = _fileSystem.path.join(selectPath, 'Applications', 'Simulator.app');
+    return _fileSystem.directory(appPath).existsSync() ? appPath : null;
   }
 }
 
-EnvironmentType environmentTypeFromSdkroot(Directory sdkroot) {
+EnvironmentType? environmentTypeFromSdkroot(Directory sdkroot) {
   assert(sdkroot != null);
   // iPhoneSimulator.sdk or iPhoneOS.sdk
   final String sdkName = sdkroot.basename.toLowerCase();

packages/flutter_tools/lib/src/macos/xcode_validator.dart

@@ -2,18 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
-import 'package:meta/meta.dart';
-
 import '../base/user_messages.dart';
 import '../doctor_validator.dart';
 import 'xcode.dart';
 
 class XcodeValidator extends DoctorValidator {
   XcodeValidator({
-    @required Xcode xcode,
-    @required UserMessages userMessages,
+    required Xcode xcode,
+    required UserMessages userMessages,
   }) : _xcode = xcode,
       _userMessages = userMessages,
       super('Xcode - develop for iOS and macOS');
@@ -25,13 +21,19 @@ class XcodeValidator extends DoctorValidator {
   Future<ValidationResult> validate() async {
     final List<ValidationMessage> messages = <ValidationMessage>[];
     ValidationType xcodeStatus = ValidationType.missing;
-    String xcodeVersionInfo;
+    String? xcodeVersionInfo;
+
+    final String? xcodeSelectPath = _xcode.xcodeSelectPath;
 
     if (_xcode.isInstalled) {
       xcodeStatus = ValidationType.installed;
-
-      messages.add(ValidationMessage(_userMessages.xcodeLocation(_xcode.xcodeSelectPath)));
-      messages.add(ValidationMessage(_xcode.versionText));
+      if (xcodeSelectPath != null) {
+        messages.add(ValidationMessage(_userMessages.xcodeLocation(xcodeSelectPath)));
+      }
+      final String? versionText = _xcode.versionText;
+      if (versionText != null) {
+        messages.add(ValidationMessage(versionText));
+      }
 
       if (!_xcode.isInstalledAndMeetsVersionCheck) {
         xcodeStatus = ValidationType.partial;
@@ -58,7 +60,7 @@ class XcodeValidator extends DoctorValidator {
 
     } else {
       xcodeStatus = ValidationType.missing;
-      if (_xcode.xcodeSelectPath == null || _xcode.xcodeSelectPath.isEmpty) {
+      if (xcodeSelectPath == null || xcodeSelectPath.isEmpty) {
         messages.add(ValidationMessage.error(_userMessages.xcodeMissing));
       } else {
         messages.add(ValidationMessage.error(_userMessages.xcodeIncomplete));

packages/flutter_tools/test/general.shard/ios/ios_workflow_test.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
 import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/base/version.dart';
 import 'package:flutter_tools/src/ios/ios_workflow.dart';