initial work to split into dart_filament and flutter_filament

dart_filament/hook/build.dart

@@ -0,0 +1,93 @@
+// Copyright (c) 2023, 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 'dart:io';
+
+import 'package:logging/logging.dart';
+import 'package:native_assets_cli/native_assets_cli.dart';
+import 'package:native_toolchain_c/native_toolchain_c.dart';
+
+void main(List<String> args) async {
+  await build(args, (config, output) async {
+    var platform = config.targetOS.toString().toLowerCase();
+    var libDir = "${config.packageRoot.toFilePath()}/native/lib/$platform/";
+
+    final packageName = config.packageName;
+
+    final sources = Directory("${config.packageRoot.toFilePath()}/native/src")
+        .listSync(recursive: true)
+        .whereType<File>()
+        .map((f) => f.path)
+        .toList();
+    sources.addAll([
+      "${config.packageRoot.toFilePath()}/native/include/material/gizmo.c",
+      "${config.packageRoot.toFilePath()}/native/include/material/image.c",
+    ]);
+
+    final cbuilder = CBuilder.library(
+      name: packageName,
+      language: Language.cpp,
+      assetName: 'dart_filament.dart',
+      sources: sources,
+      includes: ['native/include', 'native/include/filament'],
+      flags: [
+        '-mmacosx-version-min=13.0',
+        '-std=c++17',
+        '-framework',
+        'Foundation',
+        '-framework',
+        'CoreVideo',
+        '-framework',
+        'Cocoa',
+        '-framework',
+        'Metal',
+        "-lfilament",
+        "-lbackend",
+        "-lfilameshio",
+        "-lviewer",
+        "-lfilamat",
+        "-lgeometry",
+        "-lutils",
+        "-lfilabridge",
+        "-lgltfio_core",
+        "-lfilament-iblprefilter",
+        "-limage",
+        "-limageio",
+        "-ltinyexr",
+        "-lgltfio_core",
+        "-lfilaflat",
+        "-ldracodec",
+        "-libl",
+        "-lktxreader",
+        "-lpng",
+        "-lz",
+        "-lstb",
+        "-luberzlib",
+        "-lsmol-v",
+        "-luberarchive",
+        "-lzstd",
+        "-lstdc++",
+        "-lbluegl",
+        "-lbluevk",
+        "-lbasis_transcoder",
+        "-L$libDir",
+        "-force_load",
+        "$libDir/libbackend.a",
+        "-force_load",
+        "$libDir/libktxreader.a",
+        "-force_load",
+        "$libDir/libvkshaders.a",
+      ],
+      dartBuildFiles: ['hook/build.dart'],
+    );
+
+    await cbuilder.run(
+      buildConfig: config,
+      buildOutput: output,
+      logger: Logger('')
+        ..level = Level.ALL
+        ..onRecord.listen((record) => print(record.message)),
+    );
+  });
+}