Function spawn

lib/child_process.js:789–835

* Spawns a new process using the given `file`. * @param {string} file * @param {string[]} [args] * @param {{ * cwd?: string | URL; * env?: Record ; * argv0?: string; * stdio?: Array | string; * detached?: boolean; * uid?: number; * gid?: number; * serializat

(file, args, options)

 * @returns {ChildProcess}
 */
function spawn(file, args, options) {
  options = normalizeSpawnArguments(file, args, options);
  validateTimeout(options.timeout);
  validateAbortSignal(options.signal, 'options.signal');
  const killSignal = sanitizeKillSignal(options.killSignal);
  const child = new ChildProcess();

  debug('spawn', options);
  child.spawn(options);

  if (options.timeout > 0) {
    let timeoutId = setTimeout(() => {
      if (timeoutId) {
        try {
          child.kill(killSignal);
        } catch (err) {
          child.emit('error', err);
        }
        timeoutId = null;
      }
    }, options.timeout);

    child.once('exit', () => {
      if (timeoutId) {
        clearTimeout(timeoutId);
        timeoutId = null;
      }
    });
  }

  if (options.signal) {
    const signal = options.signal;
    if (signal.aborted) {
      process.nextTick(onAbortListener);
    } else {
      addAbortListener ??= require('internal/events/abort_listener').addAbortListener;
      const disposable = addAbortListener(signal, onAbortListener);
      child.once('exit', disposable[SymbolDispose]);
    }

    function onAbortListener() {
      abortChildProcess(child, killSignal, options.signal.reason);
    }
  }

  return child;
}

/**
 * Spawns a new process synchronously using the given `file`.