Add ability to get child process from the exec function

[Tzahi12345]

I was hoping there would be a way to get the child process from the exec function (calling the binary directly), it only returns undefined. Here's the relevant code:

const execa = universalify.fromPromise(require('execa'))

function youtubeDl (args, options, cb) {
  return execa(ytdlBinary, args, options, function done (err, output) {
    if (err) return cb(err)
    return cb(null, output.stdout ? output.stdout.trim().split(/\r?\n/) : undefined)
  })
}

This was apparently possible before (see this commit), but execFile has since been replaced with execa.

I played around with it for a bit and it looks like universalify.fromPromise makes it so the return result is always undefined. When execa is imported normally (w/o the universalify call), the videos don't download but the child process is returned.

I'm not crazy familiar with the universalify library or even execa, so I'd appreciate some help on how we can make this possible. I added some links below for additional reading.

---

Additional reading:

• universalify
• execa
• Ugly workaround

[jai-dewani]

Use can use fork or spawn if you want to work with children, the solution you are looking for but they return a child_process which can be used to check status, communicate and even terminate the process using the child_process object.

Hope this helps