Method readFresh

packager/src/node-haste/Module.js:378–405

* Gathers relevant data about a module: source code, transformed code, * dependencies, etc. This function reads and transforms the source from * scratch. We don't repeat the same work as `readCached` because we assume * call sites have called it already.

(transformOptions: TransformOptions)

   * call sites have called it already.
   */
  readFresh(transformOptions: TransformOptions): Promise<ReadResult> {
    const key = stableObjectHash(transformOptions || {});
    const promise = this._readPromises.get(key);
    if (promise != null) {
      return promise;
    }
    const freshPromise = Promise.resolve().then(() => {
      const cacheProps = this._getCacheProps(transformOptions, key);
      return new Promise((resolve, reject) => {
        this._getAndCacheTransformedCode(
          cacheProps,
          (transformError, freshResult) => {
            if (transformError) {
              reject(transformError);
              return;
            }
            invariant(freshResult != null, 'inconsistent state');
            resolve(this._finalizeReadResult(cacheProps.sourceCode, freshResult));
          },
        );
      }).then(result => {
        this._readResultsByOptionsKey.set(key, {result, outdatedDependencies: []});
        return result;
      });
    });
    this._readPromises.set(key, freshPromise);
    return freshPromise;
  }

  _getCacheProps(transformOptions: TransformOptions, transformOptionsKey: string) {
    const sourceCode = this._readSourceCode();