Function transformSource

src/esm.ts:373–403

(
    source: string | Buffer,
    context: { url: string; format: NodeLoaderHooksFormat },
    defaultTransformSource: typeof transformSource
  )

  }

  async function transformSource(
    source: string | Buffer,
    context: { url: string; format: NodeLoaderHooksFormat },
    defaultTransformSource: typeof transformSource
  ): Promise<{ source: string | Buffer }> {
    if (source === null || source === undefined) {
      throw new Error('No source');
    }

    const defer = () =>
      defaultTransformSource(source, context, defaultTransformSource);

    const sourceAsString =
      typeof source === 'string' ? source : source.toString('utf8');

    const { url } = context;
    const parsed = parseUrl(url);

    if (!isFileUrlOrNodeStyleSpecifier(parsed)) {
      return defer();
    }
    const nativePath = fileURLToPath(url);

    if (tsNodeService.ignored(nativePath)) {
      return defer();
    }

    const emittedJs = tsNodeService.compile(sourceAsString, nativePath);

    return { source: emittedJs };
  }

  return hooksAPI;
}