function metroImportAll()

in packages/metro-runtime/src/polyfills/require.js [221:259]

• 29 lines of code
• 10 McCabe index (conditional complexity)

function metroImportAll(moduleId: ModuleID | VerboseModuleNameForDev | number) {
  if (__DEV__ && typeof moduleId === 'string') {
    const verboseName = moduleId;
    moduleId = verboseNamesToModuleIds[verboseName];
  }

  //$FlowFixMe: at this point we know that moduleId is a number
  const moduleIdReallyIsNumber: number = moduleId;

  if (
    modules[moduleIdReallyIsNumber] &&
    modules[moduleIdReallyIsNumber].importedAll !== EMPTY
  ) {
    return modules[moduleIdReallyIsNumber].importedAll;
  }

  const exports = metroRequire(moduleIdReallyIsNumber);
  let importedAll;

  if (exports && exports.__esModule) {
    importedAll = exports;
  } else {
    importedAll = {};

    // Refrain from using Object.assign, it has to work in ES3 environments.
    if (exports) {
      for (const key in exports) {
        if (hasOwnProperty.call(exports, key)) {
          importedAll[key] = exports[key];
        }
      }
    }

    importedAll.default = exports;
  }

  // $FlowFixMe The metroRequire call above will throw if modules[id] is null
  return (modules[moduleIdReallyIsNumber].importedAll = importedAll);
}