Disable Fuchsia SDK usage unless opted in (#123084)

Disable Fuchsia SDK usage unless opted in

packages/flutter_tools/lib/src/fuchsia/fuchsia_sdk.dart

@@ -8,6 +8,7 @@ import '../base/file_system.dart';
 import '../base/io.dart';
 import '../base/platform.dart';
 import '../convert.dart';
+import '../features.dart' show featureFlags;
 import '../globals.dart' as globals;
 
 import 'fuchsia_ffx.dart';
@@ -16,7 +17,7 @@ import 'fuchsia_pm.dart';
 
 /// Returns [true] if the current platform supports Fuchsia targets.
 bool isFuchsiaSupportedPlatform(Platform platform) {
-  return platform.isLinux || platform.isMacOS;
+  return featureFlags.isFuchsiaEnabled && (platform.isLinux || platform.isMacOS);
 }
 
 /// The Fuchsia SDK shell commands.

packages/flutter_tools/test/general.shard/fuchsia/fuchsia_device_test.dart

@@ -17,6 +17,7 @@ import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/device.dart';
 import 'package:flutter_tools/src/device_port_forwarder.dart';
+import 'package:flutter_tools/src/features.dart';
 import 'package:flutter_tools/src/fuchsia/fuchsia_device.dart';
 import 'package:flutter_tools/src/fuchsia/fuchsia_ffx.dart';
 import 'package:flutter_tools/src/fuchsia/fuchsia_kernel_compiler.dart';
@@ -32,6 +33,7 @@ import 'package:vm_service/vm_service.dart' as vm_service;
 import '../../src/common.dart';
 import '../../src/context.dart';
 import '../../src/fake_vm_services.dart';
+import '../../src/fakes.dart';
 
 final vm_service.Isolate fakeIsolate = vm_service.Isolate(
   id: '1',
@@ -483,6 +485,7 @@ void main() {
       expect(device.supportsScreenshot, true);
     }, overrides: <Type, Generator>{
       Platform: () => FakePlatform(),
+      FeatureFlags: () => TestFeatureFlags(isFuchsiaEnabled: true),
     });
 
     testUsingContext('is not supported on Windows', () {
@@ -493,6 +496,7 @@ void main() {
       Platform: () => FakePlatform(
             operatingSystem: 'windows',
           ),
+      FeatureFlags: () => TestFeatureFlags(isFuchsiaEnabled: true),
     });
 
     test("takeScreenshot throws if file isn't .ppm", () async {
@@ -532,6 +536,7 @@ void main() {
               'FUCHSIA_SSH_CONFIG': '/fuchsia/out/default/.ssh',
             },
           ),
+      FeatureFlags: () => TestFeatureFlags(isFuchsiaEnabled: true),
     });
 
     testUsingContext('takeScreenshot throws if scp failed', () async {
@@ -582,6 +587,7 @@ void main() {
               'FUCHSIA_SSH_CONFIG': '/fuchsia/out/default/.ssh',
             },
           ),
+      FeatureFlags: () => TestFeatureFlags(isFuchsiaEnabled: true),
     });
 
     testUsingContext(
@@ -632,6 +638,7 @@ void main() {
               'FUCHSIA_SSH_CONFIG': '/fuchsia/out/default/.ssh',
             },
           ),
+      FeatureFlags: () => TestFeatureFlags(isFuchsiaEnabled: true),
     }, testOn: 'posix');
 
     testUsingContext('takeScreenshot returns', () async {
@@ -674,6 +681,7 @@ void main() {
               'FUCHSIA_SSH_CONFIG': '/fuchsia/out/default/.ssh',
             },
           ),
+      FeatureFlags: () => TestFeatureFlags(isFuchsiaEnabled: true),
     });
   });
 

packages/flutter_tools/test/general.shard/fuchsia/fuchsia_ffx_test.dart

@@ -6,12 +6,15 @@ import 'package:file/file.dart';
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/logger.dart';
+import 'package:flutter_tools/src/base/platform.dart';
+import 'package:flutter_tools/src/features.dart';
 import 'package:flutter_tools/src/fuchsia/fuchsia_ffx.dart';
 import 'package:flutter_tools/src/fuchsia/fuchsia_sdk.dart';
 import 'package:test/fake.dart';
 
 import '../../src/common.dart';
-import '../../src/fake_process_manager.dart';
+import '../../src/context.dart';
+import '../../src/fakes.dart';
 
 void main() {
   late FakeFuchsiaArtifacts fakeFuchsiaArtifacts;
@@ -27,6 +30,22 @@ void main() {
     fakeFuchsiaArtifacts.ffx = ffx;
   });
 
+  testUsingContext('isFuchsiaSupportedPlatform returns true when opted in on Linux and macOS', () {
+    expect(isFuchsiaSupportedPlatform(FakePlatform(operatingSystem: 'macos')), true);
+    expect(isFuchsiaSupportedPlatform(FakePlatform()), true);
+    expect(isFuchsiaSupportedPlatform(FakePlatform(operatingSystem: 'windows')), false);
+  }, overrides: <Type, Generator>{
+    FeatureFlags: () => TestFeatureFlags(isFuchsiaEnabled: true),
+  });
+
+  testUsingContext('isFuchsiaSupportedPlatform returns false when opted out on Linux and macOS', () {
+    expect(isFuchsiaSupportedPlatform(FakePlatform(operatingSystem: 'macos')), false);
+    expect(isFuchsiaSupportedPlatform(FakePlatform()), false);
+    expect(isFuchsiaSupportedPlatform(FakePlatform(operatingSystem: 'windows')), false);
+  }, overrides: <Type, Generator>{
+    FeatureFlags: () => TestFeatureFlags(),
+  });
+
   group('ffx list', () {
     testWithoutContext('ffx not found', () {
       final FuchsiaFfx fuchsiaFfx = FuchsiaFfx(