[flutter_tools] allow winuwp build to setup generated Cmake (#79676)

packages/flutter_tools/lib/src/build_info.dart

@@ -741,6 +741,11 @@ String getWindowsBuildDirectory() {
   return globals.fs.path.join(getBuildDirectory(), 'windows');
 }
 
+/// Returns the Windows UWP build output directory.
+String getWindowsBuildUwpDirectory() {
+  return globals.fs.path.join(getBuildDirectory(), 'winuwp');
+}
+
 /// Returns the Fuchsia build output directory.
 String getFuchsiaBuildDirectory() {
   return globals.fs.path.join(getBuildDirectory(), 'fuchsia');

packages/flutter_tools/lib/src/flutter_application_package.dart

@@ -108,7 +108,9 @@ class FlutterApplicationPackageFactory extends ApplicationPackageFactory {
             ? FuchsiaApp.fromFuchsiaProject(FlutterProject.current().fuchsia)
             : FuchsiaApp.fromPrebuiltApp(applicationBinary);
       case TargetPlatform.windows_uwp_x64:
-        throw UnsupportedError('Cannot build for windows_uwp_x64');
+        return applicationBinary == null
+            ? WindowsApp.fromWindowsProject(FlutterProject.current().windowsUwp)
+            : WindowsApp.fromPrebuiltApp(applicationBinary);
     }
     assert(platform != null);
     return null;

packages/flutter_tools/lib/src/windows/build_windows.dart

@@ -132,6 +132,31 @@ Future<void> buildWindowsUwp(WindowsUwpProject windowsProject, BuildInfo buildIn
       'The Windows UWP project template and build process has changed. In order to build '
       'you must delete the winuwp directory and re-create the project.',
     );
+  }
+   // Ensure that necessary ephemeral files are generated and up to date.
+  _writeGeneratedFlutterConfig(windowsProject, buildInfo, target);
+  createPluginSymlinks(windowsProject.parent);
+
+  final VisualStudio visualStudio = visualStudioOverride ?? VisualStudio(
+    fileSystem: globals.fs,
+    platform: globals.platform,
+    logger: globals.logger,
+    processManager: globals.processManager,
+  );
+  final String cmakePath = visualStudio.cmakePath;
+  if (cmakePath == null) {
+    throwToolExit('Unable to find suitable Visual Studio toolchain. '
+        'Please run `flutter doctor` for more details.');
+  }
+
+  final Directory buildDirectory = globals.fs.directory(getWindowsBuildUwpDirectory());
+  final Status status = globals.logger.startProgress(
+    'Building Windows application...',
+  );
+  try {
+    await _runCmakeGeneration(cmakePath, buildDirectory, windowsProject.cmakeFile.parent);
+  } finally {
+    status.cancel();
   }
   throwToolExit('Windows UWP builds are not implemented.');
 }

packages/flutter_tools/lib/src/windows/windows_device.dart

@@ -78,7 +78,7 @@ class WindowsUWPDevice extends DesktopDevice {
     @required FileSystem fileSystem,
     @required OperatingSystemUtils operatingSystemUtils,
   }) : super(
-      'windows-uwp',
+      'winuwp',
       platformType: PlatformType.windows,
       ephemeral: false,
       processManager: processManager,
@@ -88,7 +88,7 @@ class WindowsUWPDevice extends DesktopDevice {
   );
 
   @override
-  bool isSupported() => false;
+  bool isSupported() => true;
 
   @override
   String get name => 'Windows (UWP)';
@@ -100,7 +100,7 @@ class WindowsUWPDevice extends DesktopDevice {
   bool isSupportedForProject(FlutterProject flutterProject) {
     // TODO(flutter): update with detection once FlutterProject knows
     // about the UWP structure.
-    return false;
+    return true;
   }
 
   @override
@@ -109,8 +109,8 @@ class WindowsUWPDevice extends DesktopDevice {
     String mainPath,
     BuildInfo buildInfo,
   }) async {
-    await buildWindows(
-      FlutterProject.current().windows,
+    await buildWindowsUwp(
+      FlutterProject.current().windowsUwp,
       buildInfo,
       target: mainPath,
     );

packages/flutter_tools/test/commands.shard/hermetic/build_windows_test.dart

@@ -84,14 +84,17 @@ void main() {
 
   // Returns the command matching the build_windows call to generate CMake
   // files.
-  FakeCommand cmakeGenerationCommand({void Function() onRun}) {
+  FakeCommand cmakeGenerationCommand({void Function() onRun, bool winuwp = false}) {
     return FakeCommand(
       command: <String>[
         cmakePath,
         '-S',
-        fileSystem.path.dirname(buildFilePath),
+        fileSystem.path.dirname(winuwp ? buildUwpFilePath : buildFilePath),
         '-B',
-        r'build\windows',
+        if (winuwp)
+          r'build\winuwp'
+        else
+          r'build\windows',
         '-G',
         'Visual Studio 16 2019',
       ],
@@ -466,7 +469,7 @@ C:\foo\windows\runner\main.cpp(17,1): error C2065: 'Baz': undeclared identifier
     FeatureFlags: () => TestFeatureFlags(isWindowsUwpEnabled: true),
   });
 
-  testUsingContext('Windows build fails when the project version is out of date', () async {
+  testUsingContext('Windows UWP build fails when the project version is out of date', () async {
     final FakeVisualStudio fakeVisualStudio = FakeVisualStudio(cmakePath);
     final BuildWindowsUwpCommand command = BuildWindowsUwpCommand()
       ..visualStudioOverride = fakeVisualStudio;
@@ -482,6 +485,22 @@ C:\foo\windows\runner\main.cpp(17,1): error C2065: 'Baz': undeclared identifier
     ProcessManager: () => FakeProcessManager.any(),
     FeatureFlags: () => TestFeatureFlags(isWindowsUwpEnabled: true),
   });
+
+  testUsingContext('Windows UWP build fails after writing Cmake file', () async {
+    final FakeVisualStudio fakeVisualStudio = FakeVisualStudio(cmakePath);
+    final BuildWindowsUwpCommand command = BuildWindowsUwpCommand()
+      ..visualStudioOverride = fakeVisualStudio;
+    setUpMockUwpFilesForBuild(0);
+
+    expect(createTestCommandRunner(command).run(
+      const <String>['winuwp', '--no-pub']
+    ), throwsToolExit(message: 'Windows UWP builds are not implemented'));
+  }, overrides: <Type, Generator>{
+    Platform: () => windowsPlatform,
+    FileSystem: () => fileSystem,
+    ProcessManager: () => FakeProcessManager.list(<FakeCommand>[cmakeGenerationCommand(winuwp: true)]),
+    FeatureFlags: () => TestFeatureFlags(isWindowsUwpEnabled: true),
+  });
 }
 
 class FakeVisualStudio extends Fake implements VisualStudio {

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

@@ -40,6 +40,24 @@ void main() {
     expect(windowsDevice.supportsRuntimeMode(BuildMode.jitRelease), false);
   });
 
+  testWithoutContext('WindowsUwpDevice defaults', () async {
+    final WindowsUWPDevice windowsDevice = setUpWindowsUwpDevice();
+    final PrebuiltWindowsApp windowsApp = PrebuiltWindowsApp(executable: 'foo');
+
+    expect(await windowsDevice.targetPlatform, TargetPlatform.windows_uwp_x64);
+    expect(windowsDevice.name, 'Windows (UWP)');
+    expect(await windowsDevice.installApp(windowsApp), true);
+    expect(await windowsDevice.uninstallApp(windowsApp), true);
+    expect(await windowsDevice.isLatestBuildInstalled(windowsApp), true);
+    expect(await windowsDevice.isAppInstalled(windowsApp), true);
+    expect(windowsDevice.category, Category.desktop);
+
+    expect(windowsDevice.supportsRuntimeMode(BuildMode.debug), true);
+    expect(windowsDevice.supportsRuntimeMode(BuildMode.profile), true);
+    expect(windowsDevice.supportsRuntimeMode(BuildMode.release), true);
+    expect(windowsDevice.supportsRuntimeMode(BuildMode.jitRelease), false);
+  });
+
   testWithoutContext('WindowsDevices does not list devices if the workflow is unsupported', () async {
     expect(await WindowsDevices(
       windowsWorkflow: WindowsWorkflow(
@@ -164,6 +182,19 @@ WindowsDevice setUpWindowsDevice({
   );
 }
 
+WindowsUWPDevice setUpWindowsUwpDevice({
+  FileSystem fileSystem,
+  Logger logger,
+  ProcessManager processManager,
+}) {
+  return WindowsUWPDevice(
+    fileSystem: fileSystem ?? MemoryFileSystem.test(),
+    logger: logger ?? BufferLogger.test(),
+    processManager: processManager ?? FakeProcessManager.any(),
+    operatingSystemUtils: FakeOperatingSystemUtils(),
+  );
+}
+
 class FakeWindowsApp extends Fake implements WindowsApp {
   @override
   String executable(BuildMode buildMode) => '${buildMode.name}/executable';