[macOS] Bring up "hello_world" devicelab, compilation test for x86. (#109891)

.ci.yaml

@@ -2521,6 +2521,15 @@ targets:
       - bin/**
       - .ci.yaml
 
+  - name: Mac hello_world_macos__compile
+    bringup: true # New target https://github.com/flutter/flutter/issues/109633
+    recipe: devicelab/devicelab_drone
+    timeout: 60
+    properties:
+      tags: >
+        ["devicelab", "hostonly"]
+      task_name: hello_world_macos__compile
+
   - name: Mac module_custom_host_app_name_test
     recipe: devicelab/devicelab_drone
     timeout: 60

TESTOWNERS

@@ -226,6 +226,7 @@
 /dev/devicelab/bin/tasks/complex_layout_win_desktop__start_up.dart @schectman @flutter/desktop
 /dev/devicelab/bin/tasks/flutter_view_win_desktop__start_up.dart @schectman @flutter/desktop
 /dev/devicelab/bin/tasks/platform_view_win_desktop__start_up.dart @schectman @flutter/desktop
+/dev/devicelab/bin/tasks/hello_world_macos__compile.dart @a-wallen @flutter/desktop
 
 ## Host only framework tests
 # Linux analyze

dev/devicelab/bin/tasks/hello_world_macos__compile.dart

+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter_devicelab/framework/devices.dart';
+import 'package:flutter_devicelab/framework/framework.dart';
+import 'package:flutter_devicelab/tasks/perf_tests.dart';
+
+Future<void> main() async {
+  deviceOperatingSystem = DeviceOperatingSystem.macos;
+  await task(createHelloWorldCompileTest());
+}

dev/devicelab/lib/tasks/perf_tests.dart

@@ -671,7 +671,7 @@ class StartupTest {
             '--profile',
             '--target=$target',
           ]);
-          applicationBinaryPath = _findIosAppInBuildDirectory('$testDirectory/build/ios/iphoneos');
+          applicationBinaryPath = _findDarwinAppInBuildDirectory('$testDirectory/build/ios/iphoneos');
           break;
         case DeviceOperatingSystem.fake:
         case DeviceOperatingSystem.fuchsia:
@@ -805,7 +805,7 @@ class DevtoolsStartupTest {
              '-v',
             '--profile',
           ]);
-          applicationBinaryPath = _findIosAppInBuildDirectory('$testDirectory/build/ios/iphoneos');
+          applicationBinaryPath = _findDarwinAppInBuildDirectory('$testDirectory/build/ios/iphoneos');
           break;
         case DeviceOperatingSystem.fake:
         case DeviceOperatingSystem.fuchsia:
@@ -1376,28 +1376,41 @@ class CompileTest {
 
     switch (deviceOperatingSystem) {
       case DeviceOperatingSystem.ios:
-        options.insert(0, 'ios');
+      case DeviceOperatingSystem.macos:
+        unawaited(stderr.flush());
+        late final String deviceId;
+        if (deviceOperatingSystem == DeviceOperatingSystem.ios) {
+          deviceId = 'ios';
+        } else if (deviceOperatingSystem == DeviceOperatingSystem.macos) {
+          deviceId = 'macos';
+        } else {
+          throw Exception('Attempted to run darwin compile workflow with $deviceOperatingSystem');
+        }
+
+        options.insert(0, deviceId);
         options.add('--tree-shake-icons');
         options.add('--split-debug-info=infos/');
         watch.start();
         await flutter('build', options: options);
         watch.stop();
-        final Directory appBuildDirectory = dir(path.join(cwd, 'build/ios/Release-iphoneos'));
-        final Directory? appBundle = appBuildDirectory
-            .listSync()
-            .whereType<Directory?>()
-            .singleWhere((Directory? directory) =>
-              directory != null && path.extension(directory.path) == '.app',
-              orElse: () => null);
-        if (appBundle == null) {
-          throw 'Failed to find app bundle in ${appBuildDirectory.path}';
+        final Directory buildDirectory = dir(path.join(
+          cwd,
+          'build',
+        ));
+        final String? appBundlePath =
+            _findDarwinAppInBuildDirectory(buildDirectory.path);
+        if (appBundlePath == null) {
+          throw 'Failed to find app bundle in ${buildDirectory.path}';
         }
-        final String appPath =  appBundle.path;
         // IPAs are created manually, https://flutter.dev/ios-release/
-        await exec('tar', <String>['-zcf', 'build/app.ipa', appPath]);
+        await exec('tar', <String>['-zcf', 'build/app.ipa', appBundlePath]);
         releaseSizeInBytes = await file('$cwd/build/app.ipa').length();
         if (reportPackageContentSizes) {
-          metrics.addAll(await getSizesFromIosApp(appPath));
+          final Map<String, Object> sizeMetrics = await getSizesFromDarwinApp(
+              appPath: appBundlePath,
+              operatingSystem: deviceOperatingSystem,
+          );
+          metrics.addAll(sizeMetrics);
         }
         break;
       case DeviceOperatingSystem.android:
@@ -1435,8 +1448,6 @@ class CompileTest {
         throw Exception('Unsupported option for fake devices');
       case DeviceOperatingSystem.fuchsia:
         throw Exception('Unsupported option for Fuchsia devices');
-      case DeviceOperatingSystem.macos:
-        throw Exception('Unsupported option for macOS devices');
       case DeviceOperatingSystem.windows:
         unawaited(stderr.flush());
         options.insert(0, 'windows');
@@ -1496,7 +1507,9 @@ class CompileTest {
       case DeviceOperatingSystem.fuchsia:
         throw Exception('Unsupported option for Fuchsia devices');
       case DeviceOperatingSystem.macos:
-        throw Exception('Unsupported option for Fuchsia devices');
+        unawaited(stderr.flush());
+        options.insert(0, 'macos');
+        break;
       case DeviceOperatingSystem.windows:
         unawaited(stderr.flush());
         options.insert(0, 'windows');
@@ -1511,19 +1524,52 @@ class CompileTest {
     };
   }
 
-  static Future<Map<String, dynamic>> getSizesFromIosApp(String appPath) async {
-    // Thin the binary to only contain one architecture.
-    final String xcodeBackend = path.join(flutterDirectory.path, 'packages', 'flutter_tools', 'bin', 'xcode_backend.sh');
-    await exec(xcodeBackend, <String>['thin'], environment: <String, String>{
-      'ARCHS': 'arm64',
-      'WRAPPER_NAME': path.basename(appPath),
-      'TARGET_BUILD_DIR': path.dirname(appPath),
-    });
+  static Future<Map<String, Object>> getSizesFromDarwinApp({
+    required String appPath,
+    required DeviceOperatingSystem operatingSystem,
+  }) async {
+    late final File flutterFramework;
+    late final String frameworkDirectory;
+    switch (deviceOperatingSystem) {
+      case DeviceOperatingSystem.ios:
+        frameworkDirectory = path.join(
+          appPath,
+          'Frameworks',
+        );
+        flutterFramework = File(path.join(
+          frameworkDirectory,
+          'Flutter.framework',
+          'Flutter',
+        ));
+        break;
+      case DeviceOperatingSystem.macos:
+        frameworkDirectory = path.join(
+          appPath,
+          'Contents',
+          'Frameworks',
+        );
+        flutterFramework = File(path.join(
+          frameworkDirectory,
+          'FlutterMacOS.framework',
+          'FlutterMacOS',
+        )); // https://github.com/flutter/flutter/issues/70413
+        break;
+      case DeviceOperatingSystem.android:
+      case DeviceOperatingSystem.androidArm:
+      case DeviceOperatingSystem.androidArm64:
+      case DeviceOperatingSystem.fake:
+      case DeviceOperatingSystem.fuchsia:
+      case DeviceOperatingSystem.windows:
+        throw Exception('Called ${CompileTest.getSizesFromDarwinApp} with $operatingSystem.');
+    }
 
-    final File appFramework = File(path.join(appPath, 'Frameworks', 'App.framework', 'App'));
-    final File flutterFramework = File(path.join(appPath, 'Frameworks', 'Flutter.framework', 'Flutter'));
+    final File appFramework = File(path.join(
+      frameworkDirectory,
+      'App.framework',
+      'App',
+    ));
 
-    return <String, dynamic>{
+    return <String, Object>{
       'app_framework_uncompressed_bytes': await appFramework.length(),
       'flutter_framework_uncompressed_bytes': await flutterFramework.length(),
     };
@@ -1884,8 +1930,9 @@ Future<File> waitForFile(String path) async {
   throw StateError('Did not find vmservice out file after 1 hour');
 }
 
-String? _findIosAppInBuildDirectory(String searchDirectory) {
-  for (final FileSystemEntity entity in Directory(searchDirectory).listSync()) {
+String? _findDarwinAppInBuildDirectory(String searchDirectory) {
+  for (final FileSystemEntity entity in Directory(searchDirectory)
+    .listSync(recursive: true)) {
     if (entity.path.endsWith('.app')) {
       return entity.path;
     }