feat(win32): support prebuilt assets in the build hook

.github/workflows/win32_prebuilt_assets.yml

@@ -0,0 +1,80 @@
+name: win32_prebuilt_assets
+
+permissions:
+  contents: write
+
+on:
+  pull_request:
+    branches: [main]
+    paths:
+      - .github/workflows/win32_prebuilt_assets.yml
+      - packages/win32/hook/**
+      - packages/win32/lib/**
+      - packages/win32/src/**
+      - packages/win32/tool/**
+  push:
+    tags:
+      - win32-prebuilt-assets-*
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: windows-latest
+
+    defaults:
+      run:
+        working-directory: packages/win32
+
+    steps:
+      - name: 📚 Git Checkout
+        uses: actions/checkout@v6
+
+      - name: 🐦 Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+          cache: true
+          cache-key: flutter-:os:-:channel:-:version:-:arch:-:hash:-${{ hashFiles('**/pubspec.lock') }}
+
+      - name: 📦 Install Dependencies
+        run: flutter pub get
+
+      - name: 👷 Build Windows host
+        run: |
+          dart run tool/build.dart -owindows -aarm64
+          dart run tool/build.dart -owindows -ax64
+
+      - name: 📡 Upload artifacts
+        uses: actions/upload-artifact@v7
+        with:
+          name: windows-host
+          path: packages/win32/.dart_tool/win32/**/*.dll
+          if-no-files-found: error
+
+  release:
+    needs: build
+    if: startsWith(github.ref, 'refs/tags/win32-prebuilt-assets')
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: packages/win32
+
+    steps:
+      - name: 📚 Git Checkout
+        uses: actions/checkout@v6
+
+      - name: ⬇️ Download assets
+        uses: actions/download-artifact@v8
+        with:
+          merge-multiple: true
+          path: packages/win32/.dart_tool/win32/
+
+      - name: 🔍 Display structure of downloaded assets
+        run: ls -R .dart_tool/win32/
+
+      - name: 🚀 Create GitHub Release
+        uses: softprops/action-gh-release@v3
+        with:
+          files: packages/win32/.dart_tool/win32/**
+          fail_on_unmatched_files: true

packages/generator/bin/generator.dart

@@ -272,18 +272,21 @@ void generateDynamicLibrary(
   writeToFile(filePath, buffer.toString());
 }
 
-/// Updates the two constants in `packages/win32/hook/build.dart`:
+/// Updates the two constants in
+/// `packages/win32/lib/src/hook_helpers/resources.g.dart`:
 /// - `dynamicLibraries`: all dynamic libraries projected from the Win32 API
 /// - `sources`: all dynamic libraries with wrappers preserving `GetLastError()`
 ///   results
 ///
 /// These constants are used in the build process to determine which dynamic
 /// libraries to include as code assets.
-void updateDynamicLibrariesConstant(
+void updateResources(
   Set<winmd.ModuleRef> dynamicLibraries,
   Set<winmd.ModuleRef> wrappedLibraries,
 ) {
   final generatedBlock = StringBuffer()
+    ..writeln('// THIS FILE IS AUTOGENERATED. DO NOT EDIT THIS FILE DIRECTLY.')
+    ..writeln()
     ..writeln('const dynamicLibraries = {')
     ..writeAll(dynamicLibraries.map((l) => "  '${l.name.toLowerCase()}',\n"))
     ..writeln('};')
@@ -294,21 +297,11 @@ void updateDynamicLibrariesConstant(
     )
     ..writeln('];');
 
-  final buildFile = io.File(
-    io.Platform.script.resolve('../../win32/hook/build.dart').toFilePath(),
-  );
-
-  final content = buildFile.readAsStringSync();
-  final insertionPoint = content.indexOf('const dynamicLibraries = {');
-  if (insertionPoint == -1) {
-    throw StateError(
-      'Could not find `const dynamicLibraries` anchor in ${buildFile.path}',
-    );
-  }
-
-  buildFile.writeAsStringSync(
-    content.substring(0, insertionPoint) + generatedBlock.toString(),
-  );
+  io.File(
+    io.Platform.script
+        .resolve('../../win32/lib/src/hook_helpers/resources.g.dart')
+        .toFilePath(),
+  ).writeAsStringSync(generatedBlock.toString());
 }
 
 /// Generates a Dart file that exports all the dynamic libraries projected from
@@ -594,7 +587,7 @@ void generateFunctions() {
     );
   }
 
-  updateDynamicLibrariesConstant(dynamicLibraries, wrappedLibraries);
+  updateResources(dynamicLibraries, wrappedLibraries);
   generateDynamicLibraryExports(dynamicLibraries);
   logger.info('🚀 Total functions generated: ${functions.length}');
 }

packages/win32/hook/build.dart

@@ -2,175 +2,47 @@ import 'dart:io';
 
 import 'package:code_assets/code_assets.dart';
 import 'package:hooks/hooks.dart';
-import 'package:logging/logging.dart';
-import 'package:native_toolchain_c/native_toolchain_c.dart';
-
-const win32ImportLibraries = [
-  'Advapi32',
-  'Bthprops',
-  'Crypt32',
-  'Dbghelp',
-  'Dxva2',
-  'Gdi32',
-  'Kernel32',
-  'KtmW32',
-  'Magnification',
-  'ole32',
-  'OleAut32',
-  'Psapi',
-  'runtimeobject',
-  'Setupapi',
-  'Shell32',
-  'User32',
-  'Version',
-  'Wevtapi',
-  'Winscard',
-  'Winspool',
-  'Wlanapi',
-  'Ws2_32',
-  'Wtsapi32',
-];
-
-Logger createDefaultLogger() {
-  final logger = Logger.detached('CBuilder')
-    ..level = .INFO
-    ..onRecord.listen((record) {
-      if (record.message.contains(
-        'Microsoft (R) C/C++ Optimizing Compiler Version',
-      )) {
-        // Skip logging compiler version info.
-        return;
-      }
-
-      if (record.message.contains('Copyright (C) Microsoft Corporation.')) {
-        // Skip logging copyright info.
-        return;
-      }
-
-      if (record.level >= .WARNING) {
-        stderr.writeln(record.message);
-      } else {
-        stdout.writeln(record.message);
-      }
-      if (record.error != null) {
-        stderr.writeln(record.error);
-      }
-      if (record.stackTrace != null) {
-        stderr.writeln(record.stackTrace);
-      }
-    });
-  return logger;
-}
+import 'package:win32/src/hook_helpers/c_build.dart';
+import 'package:win32/src/hook_helpers/download.dart';
+import 'package:win32/src/hook_helpers/hashes.g.dart';
 
 void main(List<String> args) async {
   await build(args, (input, output) async {
     if (!input.config.buildCodeAssets) return;
     if (input.config.code.targetOS != .windows) return;
 
-    final packageName = input.packageName;
-    final cbuilder = CBuilder.library(
-      name: packageName,
-      assetName: '$packageName.dart',
-      sources: sources,
-      libraries: win32ImportLibraries,
-      flags: const ['/nologo'],
-    );
-
-    String normalizeDynamicLibraryName(String library) =>
-        library.replaceAll('-', '_').split('.').first;
-
-    CodeAsset createCodeAsset(String library) => .new(
-      package: packageName,
-      name: 'src/win32/${normalizeDynamicLibraryName(library)}.g.dart',
-      linkMode: DynamicLoadingSystem(.file(library)),
-    );
-
-    output.assets.code.addAll(dynamicLibraries.map(createCodeAsset));
-
-    await cbuilder.run(
-      input: input,
-      output: output,
-      logger: createDefaultLogger(),
-    );
+    addDynamicLibrariesAsCodeAssets(output);
+
+    final localBuild = input.userDefines['local_build'] as bool? ?? false;
+    if (localBuild) {
+      await runBuild(input, output);
+    } else {
+      final CodeConfig(:targetOS, :targetArchitecture) = input.config.code;
+      final outputDirectory = Directory.fromUri(input.outputDirectory);
+      final file = await downloadAsset(
+        targetOS,
+        targetArchitecture,
+        outputDirectory,
+      );
+      final fileHash = await hashAsset(file);
+      final expectedHash =
+          assetHashes[targetOS.dylibFileName(
+            createTargetName(targetOS, targetArchitecture),
+          )];
+      if (fileHash != expectedHash) {
+        throw Exception(
+          'File $file was not downloaded correctly. '
+          'Found hash $fileHash, expected $expectedHash.',
+        );
+      }
+      output.assets.code.add(
+        .new(
+          package: 'win32',
+          name: 'win32.dart',
+          linkMode: DynamicLoadingBundled(),
+          file: file.uri,
+        ),
+      );
+    }
   });
 }
-
-const dynamicLibraries = {
-  'advapi32.dll',
-  'api-ms-win-core-apiquery-l2-1-0.dll',
-  'api-ms-win-core-comm-l1-1-1.dll',
-  'api-ms-win-core-comm-l1-1-2.dll',
-  'api-ms-win-core-handle-l1-1-0.dll',
-  'api-ms-win-core-path-l1-1-0.dll',
-  'api-ms-win-core-sysinfo-l1-2-3.dll',
-  'api-ms-win-core-winrt-error-l1-1-0.dll',
-  'api-ms-win-core-winrt-l1-1-0.dll',
-  'api-ms-win-core-winrt-string-l1-1-0.dll',
-  'api-ms-win-ro-typeresolution-l1-1-0.dll',
-  'api-ms-win-ro-typeresolution-l1-1-1.dll',
-  'api-ms-win-service-core-l1-1-3.dll',
-  'api-ms-win-service-core-l1-1-4.dll',
-  'api-ms-win-service-core-l1-1-5.dll',
-  'api-ms-win-shcore-scaling-l1-1-1.dll',
-  'api-ms-win-wsl-api-l1-1-0.dll',
-  'bluetoothapis.dll',
-  'bthprops.cpl',
-  'comctl32.dll',
-  'comdlg32.dll',
-  'crypt32.dll',
-  'dbghelp.dll',
-  'dwmapi.dll',
-  'dxva2.dll',
-  'gdi32.dll',
-  'iphlpapi.dll',
-  'kernel32.dll',
-  'ktmw32.dll',
-  'magnification.dll',
-  'netapi32.dll',
-  'ntdll.dll',
-  'ole32.dll',
-  'oleaut32.dll',
-  'powrprof.dll',
-  'propsys.dll',
-  'psapi.dll',
-  'rometadata.dll',
-  'scarddlg.dll',
-  'setupapi.dll',
-  'shell32.dll',
-  'shlwapi.dll',
-  'user32.dll',
-  'uxtheme.dll',
-  'version.dll',
-  'wevtapi.dll',
-  'winmm.dll',
-  'winscard.dll',
-  'winspool.drv',
-  'wlanapi.dll',
-  'ws2_32.dll',
-  'wtsapi32.dll',
-  'xinput1_4.dll',
-};
-
-const sources = [
-  'src/advapi32.g.c',
-  'src/bluetoothapis.g.c',
-  'src/bthprops.g.c',
-  'src/crypt32.g.c',
-  'src/dbghelp.g.c',
-  'src/dxva2.g.c',
-  'src/gdi32.g.c',
-  'src/kernel32.g.c',
-  'src/ktmw32.g.c',
-  'src/magnification.g.c',
-  'src/psapi.g.c',
-  'src/setupapi.g.c',
-  'src/shell32.g.c',
-  'src/user32.g.c',
-  'src/version.g.c',
-  'src/wevtapi.g.c',
-  'src/winscard.g.c',
-  'src/winspool.g.c',
-  'src/wlanapi.g.c',
-  'src/ws2_32.g.c',
-  'src/wtsapi32.g.c',
-];