Method #checkCachedJobForRequireESM

lib/internal/modules/esm/loader.js:356–376

* Check invariants on a cached module job when require()'d from ESM. * @param {string} specifier The first parameter of require(). * @param {string} url URL of the module being required. * @param {string|undefined} parentURL URL of the module calling require(). * @param {ModuleJobBase} j

(specifier, url, parentURL, job)

   * @param {ModuleJobBase} job The cached module job.
   */
  #checkCachedJobForRequireESM(specifier, url, parentURL, job) {
    // This race should only be possible on the loader hook thread. See https://github.com/nodejs/node/issues/59666
    if (!job.module) {
      throw new ERR_REQUIRE_ESM_RACE_CONDITION(url, parentURL, this.isForAsyncLoaderHookWorker);
    }
    // This module is being evaluated, which means it's imported in a previous link
    // in a cycle.
    if (job.module.getStatus() === kEvaluating) {
      const parentFilename = urlToFilename(parentURL);
      let message = `Cannot import Module ${specifier} in a cycle.`;
      if (parentFilename) {
        message += ` (from ${parentFilename})`;
      }
      throw new ERR_REQUIRE_CYCLE_MODULE(message);
    }

    // Otherwise the module could be imported before but the evaluation may be already
    // completed (e.g. the require call is lazy) so it's okay. We will return the
    // job and check asynchronicity of the entire graph later, after the
    // graph is instantiated.
  }

  /**
   * Load a module and translate it into a ModuleWrap for require(esm).