[flutter_tools] symlink win32 plugins as UWP plugins (#80242)

packages/flutter_tools/lib/src/plugins.dart

@@ -1088,7 +1088,8 @@ Future<void> _writeWebPluginRegistrant(FlutterProject project, List<Plugin> plug
 ///
 /// This uses [project.flutterPluginsDependenciesFile], so it should only be
 /// run after refreshPluginList has been run since the last plugin change.
-void createPluginSymlinks(FlutterProject project, {bool force = false}) {
+void createPluginSymlinks(FlutterProject project, {bool force = false, @visibleForTesting FeatureFlags featureFlagsOverride}) {
+  final FeatureFlags localFeatureFlags = featureFlagsOverride ?? featureFlags;
   Map<String, dynamic> platformPlugins;
   final String pluginFileContent = _readFileContent(project.flutterPluginsDependenciesFile);
   if (pluginFileContent != null) {
@@ -1097,24 +1098,24 @@ void createPluginSymlinks(FlutterProject project, {bool force = false}) {
   }
   platformPlugins ??= <String, dynamic>{};
 
-  if (featureFlags.isWindowsEnabled && project.windows.existsSync()) {
+  if (localFeatureFlags.isWindowsEnabled && project.windows.existsSync()) {
     _createPlatformPluginSymlinks(
       project.windows.pluginSymlinkDirectory,
       platformPlugins[project.windows.pluginConfigKey] as List<dynamic>,
       force: force,
     );
   }
-  if (featureFlags.isLinuxEnabled && project.linux.existsSync()) {
+  if (localFeatureFlags.isLinuxEnabled && project.linux.existsSync()) {
     _createPlatformPluginSymlinks(
       project.linux.pluginSymlinkDirectory,
       platformPlugins[project.linux.pluginConfigKey] as List<dynamic>,
       force: force,
     );
   }
-  if (featureFlags.isWindowsUwpEnabled && project.windowsUwp.existsSync()) {
+  if (localFeatureFlags.isWindowsUwpEnabled && project.windowsUwp.existsSync()) {
     _createPlatformPluginSymlinks(
       project.windowsUwp.pluginSymlinkDirectory,
-      <dynamic>[],
+      platformPlugins[project.windows.pluginConfigKey] as List<dynamic>,
       force: force,
     );
   }

packages/flutter_tools/test/general.shard/windows/plugins_test.dart

@@ -14,9 +14,24 @@ import 'package:flutter_tools/src/plugins.dart';
 import 'package:flutter_tools/src/project.dart';
 
 import '../../src/common.dart';
+import '../../src/fakes.dart';
 
 const TemplateRenderer renderer = MustacheTemplateRenderer();
 
+const String kPluginDependencies = r'''
+{
+  "info":"This is a generated file; do not edit or check into version control.",
+  "plugins":{
+    "windows":[
+      {
+        "name":"example","path":"C:\\\\example\\\\",
+        "dependencies":[]
+      }
+    ]
+  }
+}
+''';
+
 void main() {
 
   testWithoutContext('injects Win32 plugins', () async {
@@ -64,10 +79,31 @@ void main() {
       contains('#include <test/foo.h>'),
     );
   });
+
+  testWithoutContext('Symlink injection treats UWP as Win32', () {
+    final FileSystem fileSystem = MemoryFileSystem.test();
+    setUpProject(fileSystem);
+    final FlutterProject flutterProject = FlutterProject.fromDirectoryTest(fileSystem.currentDirectory);
+    flutterProject.flutterPluginsDependenciesFile.writeAsStringSync(kPluginDependencies);
+
+    createPluginSymlinks(
+      flutterProject,
+      featureFlagsOverride: TestFeatureFlags(isWindowsUwpEnabled: true),
+    );
+
+    expect(flutterProject.windowsUwp.pluginSymlinkDirectory, exists);
+
+    final Link link = flutterProject.windowsUwp.pluginSymlinkDirectory.listSync().single as Link;
+
+    expect(link.path, '/winuwp/flutter/ephemeral/.plugin_symlinks/example');
+    expect(link.targetSync(), r'C:\\example\\');
+  });
 }
 
 void setUpProject(FileSystem fileSystem) {
   fileSystem.file('pubspec.yaml').createSync();
+  fileSystem.file('winuwp/CMakeLists.txt')
+    .createSync(recursive: true);
   fileSystem.file('winuwp/project_version')
     ..createSync(recursive: true)
     ..writeAsStringSync('0');