camlistore has a syncutil package (godoc.org/camlistore.org/pkg/syncutil) that has similar features, albeit in different structures:

- Gate is used to limit the number of parallel workers

- Group is used where sync.WaitGroup would be used. The most important thing: you have access to the error that happened in your goroutines.

Here's how to use it:

  var g = syncutil.NewGate(num_parallel_workers)

  for _, job := range jobs {
    wg.Go(func() error {
      defer g.Done()
      // do some long-running job

      // the job may fail
      return errJob
    })
  }

  return wg.Err()

  // You also have access to failing goroutines through wg.Errs()