generateImporterFlatbufferDart function

void generateImporterFlatbufferDart({ String generatedOutputDirectory = "lib/generated/", })

Implementation

void generateImporterFlatbufferDart(
    {String generatedOutputDirectory = "lib/generated/"}) {
  final packageRoot = findImporterPackageRoot();
  final flatc = findBuiltExecutable('flatc', packageRoot,
      dir: 'build/_deps/flatbuffers-build/');

  final flatcResult = Process.runSync(
      flatc.toFilePath(),
      [
        '-o',
        generatedOutputDirectory,
        '--warnings-as-errors',
        '--gen-object-api',
        '--filename-suffix',
        '_flatbuffers',
        '--dart',
        'scene.fbs',
      ],
      workingDirectory: packageRoot.toFilePath());
  if (flatcResult.exitCode != 0) {
    throw Exception(
        'Failed to generate importer flatbuffer: ${flatcResult.stderr}\n${flatcResult.stdout}');
  }

  /// Update the generated file's flatbuffer include to use a patched version
  /// that allows for flatbuffer arrays to be accessed without copies.
  /// TODO(bdero): Remove after https://github.com/google/flatbuffers/pull/8289
  ///              makes it into the Dart package.
  final generatedFile = File.fromUri(packageRoot
      .resolve(generatedOutputDirectory)
      .resolve('scene_impeller.fb_flatbuffers.dart'));
  final lines = generatedFile.readAsLinesSync();
  final importLineIndex = lines.indexWhere((element) => element
      .contains("import 'package:flat_buffers/flat_buffers.dart' as fb;"));
  if (importLineIndex == -1) {
    throw Exception('Failed to find flat_buffer import line in generated file');
  }
  lines[importLineIndex] =
      "import 'package:flutter_scene_importer/third_party/flat_buffers.dart' as fb;";
  generatedFile.writeAsStringSync(lines.join('\n'));
}