Function loadBuiltinWithHooks

lib/internal/modules/cjs/loader.js:1284–1303

* Load a specified builtin module, invoking load hooks if necessary. * @param {string} id The module ID (without the node: prefix) * @param {string} url The module URL (with the node: prefix) * @param {string} format Format from resolution. * @returns {{builtinExports: any, resultFromHook: undef

(id, url, format)

 *   of the builtin module. Otherwise, return the loadResult for the caller to continue loading.
 */
function loadBuiltinWithHooks(id, url, format) {
  let resultFromHook;
  if (loadHooks.length) {
    url ??= `node:${id}`;
    debug('loadBuiltinWithHooks ', loadHooks.length, id, url, format);
    // TODO(joyeecheung): do we really want to invoke the load hook for the builtins?
    resultFromHook = loadWithHooks(url, format || 'builtin', /* importAttributes */ undefined,
                                   getCjsConditionsArray(), getDefaultLoad(url, id), validateLoadStrict);
    if (resultFromHook.format && resultFromHook.format !== 'builtin') {
      debug('loadBuiltinWithHooks overriding module', id, url, resultFromHook);
      // Format has been overridden, return result for the caller to continue loading.
      return { builtinExports: undefined, resultFromHook };
    }
  }

  // No hooks or the hooks have not overridden the format. Load it as a builtin module and return the
  // exports.
  const mod = loadBuiltinModule(id);
  return { builtinExports: mod.exports, resultFromHook: undefined };
}

/**
 * Load a module from cache if it exists, otherwise create a new module instance.