Function importResourceModule

src/core/manifest/import-resource-module.ts:24–54

(moduleId: string)

 * @returns Imported resource module with handler
 */
export async function importResourceModule(moduleId: string): Promise<ImportedResourceModule> {
  const cached = moduleCache.get(moduleId);
  if (cached) {
    return cached;
  }

  const packageRoot = getPackageRoot();
  const modulePath = path.join(packageRoot, 'build', `${moduleId}.js`);
  const moduleUrl = pathToFileURL(modulePath).href;

  let mod: Record<string, unknown>;
  try {
    mod = (await import(moduleUrl)) as Record<string, unknown>;
  } catch (err) {
    throw new Error(`Failed to import resource module '${moduleId}': ${err}`);
  }

  if (typeof mod.handler !== 'function') {
    throw new Error(
      `Resource module '${moduleId}' does not export the required shape. ` +
        `Expected a named export: export const handler = ...`,
    );
  }

  const result: ImportedResourceModule = {
    handler: mod.handler as ImportedResourceModule['handler'],
  };

  moduleCache.set(moduleId, result);
  return result;
}

/**
 * Reset module cache (for tests).