Update minimum required version to Xcode 12 (#77025)

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

@@ -72,9 +72,7 @@ const String fixWithDevelopmentTeamInstruction = '''
        open ios/Runner.xcworkspace
   2- Select the 'Runner' project in the navigator then the 'Runner' target
      in the project settings
-  3- Make sure a 'Development Team' is selected.\u0020
-     - For Xcode 10, look under General > Signing > Team.
-     - For Xcode 11 and newer, look under Signing & Capabilities > Team.
+  3- Make sure a 'Development Team' is selected under Signing & Capabilities > Team.\u0020
      You may need to:
          - Log in with your Apple ID in Xcode first
          - Ensure you have a valid unique Bundle ID

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

@@ -106,7 +106,7 @@ Future<XcodeBuildResult> buildXcodeProject({
   }
 
   final List<ProjectMigrator> migrators = <ProjectMigrator>[
-    RemoveFrameworkLinkAndEmbeddingMigration(app.project, globals.logger, globals.xcode, globals.flutterUsage),
+    RemoveFrameworkLinkAndEmbeddingMigration(app.project, globals.logger, globals.flutterUsage),
     XcodeBuildSystemMigration(app.project, globals.logger),
     ProjectBaseConfigurationMigration(app.project, globals.logger),
     ProjectBuildLocationMigration(app.project, globals.logger),

packages/flutter_tools/lib/src/ios/migrations/remove_framework_link_and_embedding_migration.dart

@@ -8,8 +8,6 @@ import '../../base/common.dart';
 import '../../base/file_system.dart';
 import '../../base/logger.dart';
 import '../../base/project_migrator.dart';
-import '../../base/version.dart';
-import '../../macos/xcode.dart';
 import '../../project.dart';
 import '../../reporting/reporting.dart';
 
@@ -20,15 +18,12 @@ class RemoveFrameworkLinkAndEmbeddingMigration extends ProjectMigrator {
   RemoveFrameworkLinkAndEmbeddingMigration(
     IosProject project,
     Logger logger,
-    Xcode xcode,
     Usage usage,
   ) : _xcodeProjectInfoFile = project.xcodeProjectInfoFile,
-        _xcode = xcode,
         _usage = usage,
         super(logger);
 
   final File _xcodeProjectInfoFile;
-  final Xcode _xcode;
   final Usage _usage;
 
   @override
@@ -100,13 +95,10 @@ class RemoveFrameworkLinkAndEmbeddingMigration extends ProjectMigrator {
     }
 
     if (line.contains('/* App.framework ') || line.contains('/* Flutter.framework ')) {
-      // Print scary message if the user is on Xcode 11.4 or greater, or if Xcode isn't installed.
-      final bool xcodeIsInstalled = _xcode.isInstalled;
-      if(!xcodeIsInstalled || _xcode.currentVersion >= Version(11, 4, 0)) {
+      // Print scary message.
       UsageEvent('ios-migration', 'remove-frameworks', label: 'failure', flutterUsage: _usage).send();
       throwToolExit('Your Xcode project requires migration. See https://flutter.dev/docs/development/ios-project-migration for details.');
     }
-    }
 
     return line;
   }

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

@@ -29,8 +29,11 @@ import '../ios/mac.dart';
 import '../ios/xcodeproj.dart';
 import '../reporting/reporting.dart';
 
-Version get xcodeRequiredVersion => Version(11, 0, 0, text: '11.0');
-Version get xcodeRecommendedVersion => Version(12, 0, 1, text: '12.0.1');
+Version get xcodeRequiredVersion => Version(12, 0, 1, text: '12.0.1');
+
+/// Diverging this number from the minimum required version will provide a doctor
+/// warning, not error, that users should upgrade Xcode.
+Version get xcodeRecommendedVersion => xcodeRequiredVersion;
 
 /// SDK name passed to `xcrun --sdk`. Corresponds to undocumented Xcode
 /// SUPPORTED_PLATFORMS values.

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

@@ -8,12 +8,10 @@ import 'package:file/file.dart';
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/project_migrator.dart';
-import 'package:flutter_tools/src/base/version.dart';
 import 'package:flutter_tools/src/ios/migrations/project_base_configuration_migration.dart';
 import 'package:flutter_tools/src/ios/migrations/project_build_location_migration.dart';
 import 'package:flutter_tools/src/ios/migrations/remove_framework_link_and_embedding_migration.dart';
 import 'package:flutter_tools/src/ios/migrations/xcode_build_system_migration.dart';
-import 'package:flutter_tools/src/macos/xcode.dart';
 import 'package:flutter_tools/src/project.dart';
 import 'package:flutter_tools/src/reporting/reporting.dart';
 import 'package:meta/meta.dart';
@@ -45,11 +43,9 @@ void main () {
       BufferLogger testLogger;
       MockIosProject mockIosProject;
       File xcodeProjectInfoFile;
-      MockXcode mockXcode;
 
       setUp(() {
         memoryFileSystem = MemoryFileSystem.test();
-        mockXcode = MockXcode();
         xcodeProjectInfoFile = memoryFileSystem.file('project.pbxproj');
         testLogger = BufferLogger.test();
         mockIosProject = MockIosProject();
@@ -60,7 +56,6 @@ void main () {
         final RemoveFrameworkLinkAndEmbeddingMigration iosProjectMigration = RemoveFrameworkLinkAndEmbeddingMigration(
           mockIosProject,
           testLogger,
-          mockXcode,
           testUsage
         );
         expect(iosProjectMigration.migrate(), isTrue);
@@ -80,7 +75,6 @@ void main () {
         final RemoveFrameworkLinkAndEmbeddingMigration iosProjectMigration = RemoveFrameworkLinkAndEmbeddingMigration(
           mockIosProject,
           testLogger,
-          mockXcode,
           testUsage,
         );
         expect(iosProjectMigration.migrate(), isTrue);
@@ -101,7 +95,6 @@ shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.
         final RemoveFrameworkLinkAndEmbeddingMigration iosProjectMigration = RemoveFrameworkLinkAndEmbeddingMigration(
           mockIosProject,
           testLogger,
-          mockXcode,
           testUsage,
         );
         expect(iosProjectMigration.migrate(), isTrue);
@@ -129,7 +122,6 @@ keep this 2
         final RemoveFrameworkLinkAndEmbeddingMigration iosProjectMigration = RemoveFrameworkLinkAndEmbeddingMigration(
           mockIosProject,
           testLogger,
-          mockXcode,
           testUsage,
         );
         expect(iosProjectMigration.migrate(), isTrue);
@@ -147,13 +139,10 @@ keep this 2
         xcodeProjectInfoFile.writeAsStringSync('''
         746232531E83B71900CC1A5E /* App.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 746232521E83B71900CC1A5E /* App.framework */; };
 ''');
-        when(mockXcode.isInstalled).thenReturn(true);
-        when(mockXcode.currentVersion).thenReturn(Version(11, 4, 0));
 
         final RemoveFrameworkLinkAndEmbeddingMigration iosProjectMigration = RemoveFrameworkLinkAndEmbeddingMigration(
           mockIosProject,
           testLogger,
-          mockXcode,
           testUsage,
         );
 
@@ -167,13 +156,10 @@ keep this 2
         xcodeProjectInfoFile.writeAsStringSync('''
       9705A1C71CF904A300538480 /* Flutter.framework in Embed Frameworks */,
 ''');
-        when(mockXcode.isInstalled).thenReturn(true);
-        when(mockXcode.currentVersion).thenReturn(Version(11, 4, 0));
 
         final RemoveFrameworkLinkAndEmbeddingMigration iosProjectMigration = RemoveFrameworkLinkAndEmbeddingMigration(
           mockIosProject,
           testLogger,
-          mockXcode,
           testUsage,
         );
         expect(iosProjectMigration.migrate, throwsToolExit(message: 'Your Xcode project requires migration'));
@@ -186,68 +172,10 @@ keep this 2
         xcodeProjectInfoFile.writeAsStringSync('''
         746232531E83B71900CC1A5E /* App.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 746232521E83B71900CC1A5E /* App.framework */; };
 ''');
-        when(mockXcode.isInstalled).thenReturn(false);
 
         final RemoveFrameworkLinkAndEmbeddingMigration iosProjectMigration = RemoveFrameworkLinkAndEmbeddingMigration(
           mockIosProject,
           testLogger,
-          mockXcode,
-          testUsage,
-        );
-        expect(iosProjectMigration.migrate, throwsToolExit(message: 'Your Xcode project requires migration'));
-        expect(testUsage.events, contains(
-          const TestUsageEvent('ios-migration', 'remove-frameworks', label: 'failure'),
-        ));
-      });
-
-      testWithoutContext('migration fails on Xcode < 11.4', () {
-        xcodeProjectInfoFile.writeAsStringSync('''
-        746232531E83B71900CC1A5E /* App.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 746232521E83B71900CC1A5E /* App.framework */; };
-''');
-        when(mockXcode.isInstalled).thenReturn(true);
-        when(mockXcode.currentVersion).thenReturn(Version(11, 3, 0));
-
-        final RemoveFrameworkLinkAndEmbeddingMigration iosProjectMigration = RemoveFrameworkLinkAndEmbeddingMigration(
-          mockIosProject,
-          testLogger,
-          mockXcode,
-          testUsage,
-        );
-        expect(iosProjectMigration.migrate(), isTrue);
-        expect(testUsage.events, isEmpty);
-        expect(testLogger.errorText, isEmpty);
-      });
-
-      testWithoutContext('migration fails on Xcode 11.4', () {
-        xcodeProjectInfoFile.writeAsStringSync('''
-        746232531E83B71900CC1A5E /* App.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 746232521E83B71900CC1A5E /* App.framework */; };
-''');
-        when(mockXcode.isInstalled).thenReturn(true);
-        when(mockXcode.currentVersion).thenReturn(Version(11, 4, 0));
-
-        final RemoveFrameworkLinkAndEmbeddingMigration iosProjectMigration = RemoveFrameworkLinkAndEmbeddingMigration(
-          mockIosProject,
-          testLogger,
-          mockXcode,
-          testUsage,
-        );
-        expect(iosProjectMigration.migrate, throwsToolExit(message: 'Your Xcode project requires migration'));
-        expect(testUsage.events, contains(
-          const TestUsageEvent('ios-migration', 'remove-frameworks', label: 'failure'),
-        ));
-      });
-
-      testWithoutContext('migration fails on Xcode 12,0', () {
-        xcodeProjectInfoFile.writeAsStringSync('''
-        746232531E83B71900CC1A5E /* App.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 746232521E83B71900CC1A5E /* App.framework */; };
-''');
-        when(mockXcode.isInstalled).thenReturn(true);
-        when(mockXcode.currentVersion).thenReturn(Version(12, 0, 0));
-
-        final RemoveFrameworkLinkAndEmbeddingMigration iosProjectMigration = RemoveFrameworkLinkAndEmbeddingMigration(
-          mockIosProject,
-          testLogger,
-          mockXcode,
           testUsage,
         );
         expect(iosProjectMigration.migrate, throwsToolExit(message: 'Your Xcode project requires migration'));
@@ -565,7 +493,6 @@ keep this 3
 }
 
 class MockIosProject extends Mock implements IosProject {}
-class MockXcode extends Mock implements Xcode {}
 
 class FakeIOSMigrator extends ProjectMigrator {
   FakeIOSMigrator({@required this.succeeds})

packages/flutter_tools/test/general.shard/macos/xcode_test.dart

@@ -151,16 +151,16 @@ void main() {
 
         testWithoutContext('xcodeVersionSatisfactory is true when version meets minimum', () {
           when(mockXcodeProjectInterpreter.isInstalled).thenReturn(true);
-          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(11);
+          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(12);
           when(mockXcodeProjectInterpreter.minorVersion).thenReturn(0);
-          when(mockXcodeProjectInterpreter.patchVersion).thenReturn(0);
+          when(mockXcodeProjectInterpreter.patchVersion).thenReturn(1);
 
           expect(xcode.isRequiredVersionSatisfactory, isTrue);
         });
 
         testWithoutContext('xcodeVersionSatisfactory is true when major version exceeds minimum', () {
           when(mockXcodeProjectInterpreter.isInstalled).thenReturn(true);
-          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(12);
+          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(13);
           when(mockXcodeProjectInterpreter.minorVersion).thenReturn(0);
           when(mockXcodeProjectInterpreter.patchVersion).thenReturn(0);
 
@@ -169,7 +169,7 @@ void main() {
 
         testWithoutContext('xcodeVersionSatisfactory is true when minor version exceeds minimum', () {
           when(mockXcodeProjectInterpreter.isInstalled).thenReturn(true);
-          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(11);
+          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(12);
           when(mockXcodeProjectInterpreter.minorVersion).thenReturn(3);
           when(mockXcodeProjectInterpreter.patchVersion).thenReturn(0);
 
@@ -178,16 +178,16 @@ void main() {
 
         testWithoutContext('xcodeVersionSatisfactory is true when patch version exceeds minimum', () {
           when(mockXcodeProjectInterpreter.isInstalled).thenReturn(true);
-          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(11);
+          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(12);
           when(mockXcodeProjectInterpreter.minorVersion).thenReturn(0);
-          when(mockXcodeProjectInterpreter.patchVersion).thenReturn(1);
+          when(mockXcodeProjectInterpreter.patchVersion).thenReturn(2);
 
           expect(xcode.isRequiredVersionSatisfactory, isTrue);
         });
 
         testWithoutContext('isRecommendedVersionSatisfactory is false when version is less than minimum', () {
           when(mockXcodeProjectInterpreter.isInstalled).thenReturn(true);
-          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(9);
+          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(11);
           when(mockXcodeProjectInterpreter.minorVersion).thenReturn(0);
           when(mockXcodeProjectInterpreter.patchVersion).thenReturn(0);
 
@@ -255,9 +255,9 @@ void main() {
 
         testWithoutContext('isInstalledAndMeetsVersionCheck is true when macOS and installed and version is satisfied', () {
           when(mockXcodeProjectInterpreter.isInstalled).thenReturn(true);
-          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(11);
+          when(mockXcodeProjectInterpreter.majorVersion).thenReturn(12);
           when(mockXcodeProjectInterpreter.minorVersion).thenReturn(0);
-          when(mockXcodeProjectInterpreter.patchVersion).thenReturn(0);
+          when(mockXcodeProjectInterpreter.patchVersion).thenReturn(1);
 
           expect(xcode.isInstalledAndMeetsVersionCheck, isTrue);
           expect(fakeProcessManager.hasRemainingExpectations, isFalse);

packages/flutter_tools/test/general.shard/macos/xcode_validator_test.dart

@@ -69,7 +69,7 @@ void main() {
       expect(result.type, ValidationType.partial);
       expect(result.messages.last.type, ValidationMessageType.hint);
       expect(result.messages.last.message, contains('Xcode 11.0.0 out of date (12.0.1 is recommended)'));
-    });
+    }, skip: true); // Unskip and update when minimum and required check versions diverge.
 
     testWithoutContext('Emits partial status when Xcode EULA not signed', () async {
       when(xcode.isInstalled).thenReturn(true);

packages/flutter_tools/test/src/context.dart

@@ -338,16 +338,16 @@ class FakeXcodeProjectInterpreter implements XcodeProjectInterpreter {
   bool get isInstalled => true;
 
   @override
-  String get versionText => 'Xcode 11.0';
+  String get versionText => 'Xcode 12.0.1';
 
   @override
-  int get majorVersion => 11;
+  int get majorVersion => 12;
 
   @override
   int get minorVersion => 0;
 
   @override
-  int get patchVersion => 0;
+  int get patchVersion => 1;
 
   @override
   Future<Map<String, String>> getBuildSettings(