Add another example

Author: mosuem

pkgs/native_assets_builder/test_data/treeshaking_native_assets/.gitignore renamed to pkgs/native_assets_builder/test_data/drop_dylib_link/.gitignore

@@ -1,4 +1,4 @@
 # https://dart.dev/guides/libraries/private-files
 # Created by `dart pub`
 .dart_tool/
-bin/treeshaking_native_assets/
+bin/drop_dylib_link/

pkgs/native_assets_builder/test_data/drop_dylib_link/README.md

@@ -0,0 +1 @@
+This sample builds a native library for adding and multiplying, but then only keeps the one for adding in the linking step.

pkgs/native_assets_builder/test_data/treeshaking_native_assets/bin/treeshaking_native_assets.dart renamed to pkgs/native_assets_builder/test_data/drop_dylib_link/bin/drop_dylib_link.dart

@@ -2,8 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:treeshaking_native_assets/treeshaking_native_assets.dart';
+import 'package:drop_dylib_link/drop_dylib_link.dart';
 
 void main(List<String> arguments) {
-  print('Hello world: ${MyMath.multiply(3, 4)}!');
+  print('Hello world: ${MyMath.add(3, 4)}!');
 }

pkgs/native_assets_builder/test_data/drop_dylib_link/hook/build.dart

@@ -0,0 +1,48 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:logging/logging.dart';
+import 'package:native_assets_cli/native_assets_cli.dart';
+import 'package:native_toolchain_c/native_toolchain_c.dart';
+
+const packageName = 'drop_dylib_link';
+
+void main(List<String> arguments) async {
+  await build(arguments, (config, output) async {
+    final logger = Logger('')
+      ..level = Level.ALL
+      ..onRecord.listen((record) {
+        print('${record.level.name}: ${record.time}: ${record.message}');
+      });
+    await CBuilder.library(
+      name: 'add',
+      assetName: 'dylib_add',
+      sources: [
+        'src/native_add.c',
+      ],
+      dartBuildFiles: ['hook/build.dart'],
+      linkModePreference: LinkModePreference.dynamic,
+    ).run(
+      buildConfig: config,
+      buildOutput: output,
+      logger: logger,
+      linkInPackage: packageName,
+    );
+
+    await CBuilder.library(
+      name: 'multiply',
+      assetName: 'dylib_multiply',
+      sources: [
+        'src/native_multiply.c',
+      ],
+      dartBuildFiles: ['hook/build.dart'],
+      linkModePreference: LinkModePreference.dynamic,
+    ).run(
+      buildConfig: config,
+      buildOutput: output,
+      logger: logger,
+      linkInPackage: packageName,
+    );
+  });
+}

pkgs/native_assets_builder/test_data/drop_dylib_link/hook/link.dart

@@ -0,0 +1,18 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:native_assets_cli/native_assets_cli.dart';
+
+void main(List<String> arguments) async {
+  await link(arguments, (config, output) async {
+    print('''
+Received ${config.assets.length} assets: ${config.assets.map((e) => e.id)}.
+''');
+    output.addAssets(config.assets.where((asset) => asset.id.endsWith('add')));
+    print('''
+Keeping only ${output.assets.map((e) => e.id)}.
+''');
+    output.addDependency(config.packageRoot.resolve('hook/link.dart'));
+  });
+}

pkgs/native_assets_builder/test_data/treeshaking_native_assets/lib/treeshaking_native_assets.dart renamed to pkgs/native_assets_builder/test_data/drop_dylib_link/lib/drop_dylib_link.dart

@@ -2,4 +2,4 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-export 'src/treeshaking_native_assets.dart';
+export 'src/drop_dylib_link.dart';

pkgs/native_assets_builder/test_data/treeshaking_native_assets/lib/src/treeshaking_native_assets.dart renamed to pkgs/native_assets_builder/test_data/drop_dylib_link/lib/src/drop_dylib_link.dart

@@ -4,7 +4,7 @@
 
 import 'package:meta/meta.dart';
 
-import 'treeshaking_native_assets_bindings.dart' as bindings;
+import 'drop_dylib_link_bindings.dart' as bindings;
 
 class MyMath {
   @ResourceIdentifier('add')

pkgs/native_assets_builder/test_data/treeshaking_native_assets/lib/src/treeshaking_native_assets_bindings.dart renamed to pkgs/native_assets_builder/test_data/drop_dylib_link/lib/src/drop_dylib_link_bindings.dart

@@ -4,13 +4,15 @@
 
 import 'dart:ffi' as ffi;
 
-@ffi.Native<ffi.Int32 Function(ffi.Int32, ffi.Int32)>()
+@ffi.Native<ffi.Int32 Function(ffi.Int32, ffi.Int32)>(
+    assetId: 'package:drop_dylib_link/dylib_add')
 external int add(
   int a,
   int b,
 );
 
-@ffi.Native<ffi.Int32 Function(ffi.Int32, ffi.Int32)>()
+@ffi.Native<ffi.Int32 Function(ffi.Int32, ffi.Int32)>(
+    assetId: 'package:drop_dylib_link/dylib_multiply')
 external int multiply(
   int a,
   int b,

pkgs/native_assets_builder/test_data/treeshaking_native_assets/pubspec.yaml renamed to pkgs/native_assets_builder/test_data/drop_dylib_link/pubspec.yaml

@@ -1,5 +1,5 @@
-name: treeshaking_native_assets
-description: A sample on how to treeshake symbols using a build/link combo.
+name: drop_dylib_link
+description: Generate two dylibs, remove one in linking.
 version: 1.0.0
 
 publish_to: none

pkgs/native_assets_builder/test_data/treeshaking_native_assets/src/native_add.c renamed to pkgs/native_assets_builder/test_data/drop_dylib_link/src/native_add.c

@@ -4,6 +4,6 @@
 
 #include "native_add.h"
 
-int32_t add(int32_t a, int32_t b) {
+MYLIB_EXPORT int32_t add(int32_t a, int32_t b) {
    return a + b;
 }