[flutter_tools] run UWP builds ahead of cmake (#80879)

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

@@ -164,12 +164,72 @@ Future<void> buildWindowsUwp(WindowsUwpProject windowsProject, BuildInfo buildIn
     'Building Windows application...',
   );
   try {
+    // The Cmake re-entrant build does not work for UWP, so the flutter build is
+    // run in advance.
+    await _runFlutterBuild(buildDirectory, buildInfo, target);
     await _runCmakeGeneration(cmakePath, buildDirectory, windowsProject.cmakeFile.parent);
     await _runBuild(cmakePath, buildDirectory, buildModeName, install: false);
   } finally {
     status.cancel();
   }
-  throwToolExit('Windows UWP builds are not implemented.');
+}
+
+const Map<BuildMode, String> _targets = <BuildMode, String>{
+  BuildMode.debug: 'debug_bundle_windows_assets_uwp',
+  BuildMode.profile: 'profile_bundle_windows_assets_uwp',
+  BuildMode.release: 'release_bundle_windows_assets_uwp',
+};
+
+Future<void> _runFlutterBuild(Directory buildDirectory, BuildInfo buildInfo, String targetFile) async {
+  await buildDirectory.create(recursive: true);
+  int result;
+  String flutterEngine;
+  String localEngine;
+  if (globals.artifacts is LocalEngineArtifacts) {
+    final LocalEngineArtifacts localEngineArtifacts = globals.artifacts as LocalEngineArtifacts;
+    final String engineOutPath = localEngineArtifacts.engineOutPath;
+    flutterEngine = globals.fs.path.dirname(globals.fs.path.dirname(engineOutPath));
+    localEngine = globals.fs.path.basename(engineOutPath);
+  }
+  try {
+    result = await globals.processUtils.stream(
+      <String>[
+        globals.fs.path.join(Cache.flutterRoot, 'bin', 'flutter'),
+        if (globals.logger.isVerbose)
+          '--verbose',
+        if (flutterEngine != null) '--local-engine-src-path=$flutterEngine',
+        if (localEngine != null) '--local-engine=$localEngine',
+        'assemble',
+        '--no-version-check',
+        '--output=build',
+        '-dTargetPlatform=windows-uwp-x64',
+        '-dTrackWidgetCreation=${buildInfo.trackWidgetCreation}',
+        '-dBuildMode=${getNameForBuildMode(buildInfo.mode)}',
+        '-dTargetFile=$targetFile',
+        '-dTreeShakeIcons="${buildInfo.treeShakeIcons}"',
+        '-dDartObfuscation=${buildInfo.dartObfuscation}',
+        if (buildInfo.bundleSkSLPath != null)
+          '-iBundleSkSLPath=${buildInfo.bundleSkSLPath}',
+        if (buildInfo.codeSizeDirectory != null)
+          '-dCodeSizeDirectory=${buildInfo.codeSizeDirectory}',
+        if (buildInfo.splitDebugInfoPath != null)
+          '-dSplitDebugInfo=${buildInfo.splitDebugInfoPath}',
+        if (buildInfo.dartDefines != null && buildInfo.dartDefines.isNotEmpty)
+          '--DartDefines=${encodeDartDefines(buildInfo.dartDefines)}',
+        if (buildInfo.extraGenSnapshotOptions != null && buildInfo.extraGenSnapshotOptions.isNotEmpty)
+          '--ExtraGenSnapshotOptions=${buildInfo.extraGenSnapshotOptions}',
+        if (buildInfo.extraFrontEndOptions != null && buildInfo.extraFrontEndOptions.isNotEmpty)
+          '--ExtraFrontEndOptions=${buildInfo.extraFrontEndOptions}',
+        _targets[buildInfo.mode],
+      ],
+      trace: true,
+    );
+  } on ArgumentError {
+    throwToolExit("cmake not found. Run 'flutter doctor' for more information.");
+  }
+  if (result != 0) {
+    throwToolExit('Unable to generate build files');
+  }
 }
 
 Future<void> _runCmakeGeneration(String cmakePath, Directory buildDir, Directory sourceDir) async {

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

@@ -51,5 +51,5 @@ Future<void> createManifest({
   outputs.add(project.ephemeralDirectory.childFile('icudtl.dat'));
   project.ephemeralDirectory.childFile('install_manifest')
     ..createSync(recursive: true)
-    ..writeAsStringSync(outputs.map((File file) => file.absolute.path).join('\n'));
+    ..writeAsStringSync(outputs.map((File file) => file.absolute.uri.path.substring(1)).join('\n'));
 }

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

@@ -53,6 +53,7 @@ void main() {
 
   setUpAll(() {
     Cache.disableLocking();
+    Cache.flutterRoot = '';
   });
 
   setUp(() {
@@ -530,7 +531,7 @@ C:\foo\windows\runner\main.cpp(17,1): error C2065: 'Baz': undeclared identifier
     setUpMockProjectFilesForBuild();
 
     // This message should include 'To enable, run "flutter config --enable-windows-uwp-desktop"."
-    // once the `windowsUwpEmbedding` feature is available on all platforms.
+    // once the `windowsUwpEmbedding` feature is available on all channels.
     expect(createTestCommandRunner(command).run(
         const <String>['winuwp', '--no-pub']
     ), throwsToolExit(message: RegExp(r'"build winuwp" is not currently supported\.$')));
@@ -541,19 +542,34 @@ C:\foo\windows\runner\main.cpp(17,1): error C2065: 'Baz': undeclared identifier
     FeatureFlags: () => TestFeatureFlags(isWindowsUwpEnabled: false),
   });
 
-  testUsingContext('Windows UWP build fails after writing Cmake file', () async {
+  testUsingContext('Windows UWP build completes successfully', () async {
     final FakeVisualStudio fakeVisualStudio = FakeVisualStudio(cmakePath);
     final BuildWindowsUwpCommand command = BuildWindowsUwpCommand()
       ..visualStudioOverride = fakeVisualStudio;
     setUpMockUwpFilesForBuild(0);
 
-    expect(createTestCommandRunner(command).run(
+    await 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>[
+      const FakeCommand(
+        command: <String>[
+          r'C:\flutter\bin\flutter',
+          'assemble',
+          '--no-version-check',
+          '--output=build',
+          '-dTargetPlatform=windows-uwp-x64',
+          '-dTrackWidgetCreation=true',
+          '-dBuildMode=release',
+          r'-dTargetFile=lib\main.dart',
+          '-dTreeShakeIcons="true"',
+          '-dDartObfuscation=false',
+          'release_bundle_windows_assets_uwp'
+        ],
+      ),
       cmakeGenerationCommand(winuwp: true),
       buildCommand('Release',  stdout: 'STDOUT STUFF', winuwp: true),
     ]),

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

@@ -22,7 +22,7 @@ void main() {
   FileSystem fileSystem;
 
   setUp(() {
-    fileSystem = MemoryFileSystem.test();
+    fileSystem = MemoryFileSystem.test(style: FileSystemStyle.windows);
   });
 
   testUsingContext('Generates install manifest for a debug build', () async {
@@ -44,11 +44,11 @@ void main() {
     final File manifest = flutterProject.windowsUwp.ephemeralDirectory.childFile('install_manifest');
     expect(manifest, exists);
     expect(manifest.readAsLinesSync(), unorderedEquals(<String>[
-      '/build/winuwp/flutter_assets/kernel_blob.bin',
-      '/build/winuwp/flutter_assets/AssetManifest.json',
-      '/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll',
-      '/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll.pdb',
-      '/winuwp/flutter/ephemeral/icudtl.dat',
+      'C:/build/winuwp/flutter_assets/kernel_blob.bin',
+      'C:/build/winuwp/flutter_assets/AssetManifest.json',
+      'C:/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll',
+      'C:/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll.pdb',
+      'C:/winuwp/flutter/ephemeral/icudtl.dat',
     ]));
   }, overrides: <Type, Generator>{
     FileSystem: () => fileSystem,
@@ -74,11 +74,11 @@ void main() {
     final File manifest = flutterProject.windowsUwp.ephemeralDirectory.childFile('install_manifest');
     expect(manifest, exists);
     expect(manifest.readAsLinesSync(), unorderedEquals(<String>[
-      '/build/winuwp/app.so',
-      '/build/winuwp/flutter_assets/AssetManifest.json',
-      '/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll',
-      '/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll.pdb',
-      '/winuwp/flutter/ephemeral/icudtl.dat'
+      'C:/build/winuwp/app.so',
+      'C:/build/winuwp/flutter_assets/AssetManifest.json',
+      'C:/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll',
+      'C:/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll.pdb',
+      'C:/winuwp/flutter/ephemeral/icudtl.dat'
     ]));
   }, overrides: <Type, Generator>{
     FileSystem: () => fileSystem,
@@ -128,14 +128,14 @@ flutter:
     final File manifest = flutterProject.windowsUwp.ephemeralDirectory.childFile('install_manifest');
     expect(manifest, exists);
     expect(manifest.readAsLinesSync(), unorderedEquals(<String>[
-      '/build/winuwp/app.so',
-      '/build/winuwp/flutter_assets/assets/foo.png',
-      '/build/winuwp/flutter_assets/AssetManifest.json',
-      '/build/winuwp/flutter_assets/FontManifest.json',
-      '/build/winuwp/flutter_assets/NOTICES',
-      '/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll',
-      '/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll.pdb',
-      '/winuwp/flutter/ephemeral/icudtl.dat'
+      'C:/build/winuwp/app.so',
+      'C:/build/winuwp/flutter_assets/assets/foo.png',
+      'C:/build/winuwp/flutter_assets/AssetManifest.json',
+      'C:/build/winuwp/flutter_assets/FontManifest.json',
+      'C:/build/winuwp/flutter_assets/NOTICES',
+      'C:/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll',
+      'C:/winuwp/flutter/ephemeral/flutter_windows_winuwp.dll.pdb',
+      'C:/winuwp/flutter/ephemeral/icudtl.dat'
     ]));
   }, overrides: <Type, Generator>{
     FileSystem: () => fileSystem,