feat: extend build hook to support Windows (tc_helper.dll) auto-compilation

Author: bhola-dev58

hook/build.dart

@@ -4,14 +4,22 @@ import 'package:native_assets_cli/code_assets.dart';
 
 void main(List<String> args) async {
   await build(args, (input, output) async {
-    // Check if code assets are supported/requested
-    // Note: hook/build.dart is only called if the package has native assets.
-    
     final targetOS = input.config.code.targetOS;
-    if (targetOS != OS.linux) return;
+
+    // Only support Linux and Windows for now.
+    // macOS support will be added once tested on a Mac environment.
+    if (targetOS != OS.linux && targetOS != OS.windows) return;
 
     final rustDir = input.packageRoot.resolve('rust/');
-	
+
+    // Determine the correct library filename for the target OS
+    final String libName;
+    if (targetOS == OS.windows) {
+      libName = 'tc_helper.dll';
+    } else {
+      libName = 'libtc_helper.so';
+    }
+
     // 1. Run cargo build --release
     final result = await Process.run(
       'cargo',
@@ -22,21 +30,23 @@ void main(List<String> args) async {
     if (result.exitCode != 0) {
       stdout.write(result.stdout);
       stderr.write(result.stderr);
-      throw Exception('Rust build failed');
+      throw Exception('Rust build failed on $targetOS');
     }
 
-    // 2. Locate the library
-    final libName = 'libtc_helper.so';
+    // 2. Locate the compiled library
     final libPath = rustDir.resolve('target/release/$libName');
 
     if (!await File.fromUri(libPath).exists()) {
-      throw Exception('Built library not found at $libPath');
+      throw Exception(
+        'Built library not found at $libPath.\n'
+        'Make sure Rust and Cargo are installed and the build succeeded.',
+      );
     }
 
-    // 3. Add the asset to the output
+    // 3. Register the native asset with Flutter
     output.assets.code.add(CodeAsset(
       package: input.packageName,
-      name: 'main.dart', 
+      name: 'main.dart',
       linkMode: DynamicLoadingBundled(),
       file: libPath,
     ));