Massive refactoring underway

[ronkorving]

Just an FYI (to those interested, eg @kkoopa, @reqshark).

I'm completely refactoring what we export, as it's such a complete and utter mess right now, I want to prepare you for what's coming:

Removal of all constants on module.exports

Yes, all constants are gone. This is relevant, because some constants actually conflict with API (subscribe and unsubscribe for example are socket options, but also API). As ZMQ gets more and more socket options, this has become an unmanageable mess. Time for some clean up. That means that people will have to use getsockopt and setsockopt to access options. They may still use shorthand (last_endpoint) and full constant string names (ZMQ_LAST_ENDPOINT), as well as the actual integer representing the option.

No more module.exports = zmq; // the binding

The binding should be wrapped, not infested with all kinds of separate API.

A rewrite of how defined constants are registered

Currently, they're stored by number. In the upcoming PR they will be:

#ifdef ZMQ_LAST_ENDPOINT
  OPT(binary, ZMQ_LAST_ENDPOINT);
#endif

This macro will inject it into opts_binary and JS land: zmq.options (string -> int). All the options are gone from JS land. It's all driven from C++. JS just exposes it.
I'm taking this opportunity to add all missing options (there are a few).

Once all this is done, this will obviously mean major version bump.

[reqshark]

this is awesome, i've already had a chance to review some of these changes! great job!

[ralphtheninja]

It's all driven from C++. JS just exposes it.

+1

[rgbkrk]

Let me know if you want to adapt the prebuilt work over to here or if there are other bits you'd like to tackle. @minrk stated an interest in cleaning up some of the race conditions present in the current code base too.

[ronkorving]

What race conditions? I don't think I'm aware of any...
The prebuilt work would be great to have and seems independent to #516, so go for it. I'm no expert in this area, so could definitely use some help from as many people as possible there.

[minrk]

Race conditions were just in tests, not library code. Changes were here.