async-transforms/require/worker/internal-worker.cjs

Asynchronous stream transforms

'use strict';

var worker = require('worker_threads');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

function _interopNamespace(e) {
  if (e && e.__esModule) return e;
  var n = Object.create(null);
  if (e) {
    Object.keys(e).forEach(function (k) {
      if (k !== 'default') {
        var d = Object.getOwnPropertyDescriptor(e, k);
        Object.defineProperty(n, k, d.get ? d : {
          enumerable: true,
          get: function () {
            return e[k];
          }
        });
      }
    });
  }
  n['default'] = e;
  return Object.freeze(n);
}

var worker__default = /*#__PURE__*/_interopDefaultLegacy(worker);

/**
 * @fileoverview Runnable that invokes Worker.
 */

const {parentPort} = worker__default['default'];

if (worker__default['default'].isMainThread || !parentPort) {
  throw new TypeError('cannot run on main thread');
}

const {dep} = worker__default['default'].workerData;

Promise.resolve().then(function () { return /*#__PURE__*/_interopNamespace(require(dep)); })
  .then(({default: method}) => {
    parentPort.on('message', ({args, port}) => {
      Promise.resolve()
          .then(() => method(...args))
          .then((result) => port.postMessage({result}))
          .catch((error) => port.postMessage({error}))
          .then(() => port.close());
    });
    parentPort.postMessage({ok: true});
  })
  .catch((error) => {
    // Failure mode: the module couldn't be imported, complain loudly.
    parentPort.on('message', ({port}) => {
      port.postMessage({error});
      port.close();
    });
    parentPort.postMessage({ok: false});
    throw error;
  });