generateCloudflareWorkerEntry function

String generateCloudflareWorkerEntry({ required String importPath, String factory = 'engine', Iterable<String> durableObjectClasses = const <String>[], })

Generates the Dart Worker entrypoint used by a Cloudflare deployment.

importPath must identify the application library that exports the selected factory. With the default engine factory, that library must expose createEngine; with environment, it must expose createCloudflareEngine. Names in durableObjectClasses are emitted as registrations and must be exported by the same application library.

final entry = generateCloudflareWorkerEntry(
  importPath: 'package:todo_app/app.dart',
  factory: 'environment',
  durableObjectClasses: const ['Counter'],
);

Throws an ArgumentError when factory is not engine or environment.

Implementation

String generateCloudflareWorkerEntry({
  required String importPath,
  String factory = 'engine',
  Iterable<String> durableObjectClasses = const <String>[],
}) {
  final factorySource = switch (factory) {
    'engine' => 'defineCloudflareFetchFactoryAsync(app.createEngine);',
    'environment' =>
      'defineCloudflareFetchFactoryWithEnvironmentAsync('
          'app.createCloudflareEngine);',
    _ => throw ArgumentError.value(
      factory,
      'factory',
      'must be engine or environment',
    ),
  };
  final classes = durableObjectClasses.toList(growable: false);
  final registration = classes.isEmpty
      ? ''
      : '''
  defineCloudflareDurableObjects({
${classes.map((name) => "    '$name': app.$name.new,").join('\n')}
  });
''';
  return '''
import 'package:routed_node/cloudflare.dart';
import '$importPath' as app;

void main() {
$registration  $factorySource
}
''';
}