build method

@override Future<void> build(BuildStep buildStep)

Generates the outputs for a given BuildStep.

Implementation

@override
Future<void> build(BuildStep buildStep) async {
  if (!await buildStep.resolver.isLibrary(buildStep.inputId)) {
    print('Not library ${buildStep.inputId.pathSegments}');
    return;
  }

  try {
    final lib = await buildStep.inputLibrary;
    final typings =
        TypeChecker.fromUrl('package:typings/annotations.dart#Typings');
    parseBase(DartObject ann) => (
          dirName: ann.getField('dirName')!.toStringValue()!,
          contextCheck: ann.getField('contextCheck')?.toStringValue(),
          package: ann.getField('package')!.toStringValue()!,
          version: ann.getField('version')!.toStringValue()!,
          distFiles: ann
              .getField('distFiles')!
              .toListValue()!
              .map((o) => o.toStringValue()!)
              .toList(),
          uses: ann
              .getField('uses')!
              .toListValue()!
              .map((o) => o.toStringValue()!)
              .toList()
        );

    final exports = lib.libraryExports.toList();

    for (final exp in exports) {
      final anns = typings.annotationsOf(exp);

      for (final ann in anns) {
        switch (ann.type?.getDisplayString(withNullability: false)) {
          case '_TypingsNPM':
            final base = parseBase(ann);
            final pkg = ann.getField('packageJson')!;
            print('_TypingsNPM $base');

            await Transpiler.fromNpm(
                package: base.package,
                version: base.version,
                dirName: base.dirName,
                contextCheck: base.contextCheck,
                packageJson: (
                  typings: pkg.getField('typings')!.toBoolValue()!,
                  import: pkg.getField('import')!.toBoolValue()!
                ),
                distFiles: base.distFiles,
                uses: base.uses,
                targetPath: '${Directory.current.path}/lib/',
                files: ann
                    .getField('files')!
                    .toListValue()!
                    .map((o) => o.toStringValue()!)
                    .toList());
            print('DONE NPM ${base.package}');
            break;
          case '_TypingsUrls':
            final base = parseBase(ann);

            print('TypingsURL $base');

            await Transpiler.fromUrls(
                package: base.package,
                version: base.version,
                dirName: base.dirName,
                contextCheck: base.contextCheck,
                distFiles: base.distFiles,
                uses: base.uses,
                targetPath: '${Directory.current.path}/lib/',
                urls: ann
                    .getField('urls')!
                    .toListValue()!
                    .map((o) => o.toStringValue()!)
                    .toList());
            print('DONE URLS ${base.package}');
            break;
          default:
            throw 'Unknown typings annotation: $ann';
        }
      }
    }
  } catch (e, st) {
    print('TYPINGS BUILD ERROR: $e\n$st');
    rethrow;
  }
}