Add xcresulttool --legacy flag for deprecated usage (#152988)

Workaround to add the `--legacy` flag until https://github.com/flutter/flutter/issues/151502 can adopt the non-deprecated usage.

This will allow Xcode errors to be parseable again.

Fixes https://github.com/flutter/flutter/issues/152989

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

@@ -7,6 +7,7 @@ import 'package:meta/meta.dart';
 import '../../src/base/process.dart';
 import '../../src/convert.dart' show json;
 import '../../src/macos/xcode.dart';
+import '../base/version.dart';
 import '../convert.dart';
 
 /// The generator of xcresults.
@@ -35,18 +36,22 @@ class XCResultGenerator {
 
   /// Generates the XCResult.
   ///
-  /// Calls `xcrun xcresulttool get --path <resultPath> --format json`,
+  /// Calls `xcrun xcresulttool get --legacy --path <resultPath> --format json`,
   /// then stores the useful information the json into an [XCResult] object.
   ///
   /// A`issueDiscarders` can be passed to discard any issues that matches the description of any [XCResultIssueDiscarder] in the list.
   Future<XCResult> generate(
       {List<XCResultIssueDiscarder> issueDiscarders =
           const <XCResultIssueDiscarder>[]}) async {
+    final Version? xcodeVersion = xcode.currentVersion;
     final RunResult result = await processUtils.run(
       <String>[
         ...xcode.xcrunCommand(),
         'xcresulttool',
         'get',
+        // See https://github.com/flutter/flutter/issues/151502
+        if (xcodeVersion != null && xcodeVersion >= Version(16, 0, 0))
+          '--legacy',
         '--path',
         resultPath,
         '--format',
@@ -74,7 +79,7 @@ class XCResultGenerator {
 
 /// The xcresult of an `xcodebuild` command.
 ///
-/// This is the result from an `xcrun xcresulttool get --path <resultPath> --format json` run.
+/// This is the result from an `xcrun xcresulttool get --legacy --path <resultPath> --format json` run.
 /// The result contains useful information such as build errors and warnings.
 class XCResult {
   /// Parse the `resultJson` and stores useful information in the returned `XCResult`.

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

@@ -4,6 +4,7 @@
 
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/process.dart';
+import 'package:flutter_tools/src/base/version.dart';
 import 'package:flutter_tools/src/ios/xcodeproj.dart';
 import 'package:flutter_tools/src/ios/xcresult.dart';
 import 'package:flutter_tools/src/macos/xcode.dart';
@@ -21,12 +22,15 @@ void main() {
     required Xcode xcode,
     int exitCode = 0,
     String stderr = '',
+    bool useLegacyFlag = true,
   }) {
     return FakeCommand(
       command: <String>[
         ...xcode.xcrunCommand(),
         'xcresulttool',
         'get',
+        if (useLegacyFlag)
+          '--legacy',
         '--path',
         tempResultPath,
         '--format',
@@ -58,6 +62,8 @@ void main() {
     required String resultJson,
     int exitCode = 0,
     String stderr = '',
+    Version? xcodeVersion = const Version.withText(16, 0, 0, '16.0'),
+    bool useLegacyFlag = true,
   }) {
     final FakeProcessManager fakeProcessManager =
         FakeProcessManager.list(<FakeCommand>[
@@ -68,7 +74,7 @@ void main() {
       processManager: fakeProcessManager,
       xcodeProjectInterpreter: XcodeProjectInterpreter.test(
         processManager: fakeProcessManager,
-        version: null,
+        version: xcodeVersion,
       ),
     );
     fakeProcessManager.addCommands(
@@ -79,6 +85,7 @@ void main() {
           xcode: xcode,
           exitCode: exitCode,
           stderr: stderr,
+          useLegacyFlag: useLegacyFlag
         ),
       ],
     );
@@ -217,6 +224,19 @@ void main() {
     expect(result.parsingErrorMessage, isNull);
   });
 
+  testWithoutContext(
+      'correctly parse sample result on < Xcode 16.', () async {
+    final XCResultGenerator generator = setupGenerator(
+      resultJson: kSampleResultJsonNoIssues,
+      xcodeVersion: Version(15, 0, 0),
+      useLegacyFlag: false,
+    );
+    final XCResult result = await generator.generate();
+    expect(result.issues.length, 0);
+    expect(result.parseSuccess, isTrue);
+    expect(result.parsingErrorMessage, isNull);
+  });
+
   testWithoutContext(
       'error: `xcresulttool get` process fail should return an `XCResult` with stderr as `parsingErrorMessage`.',
       () async {