Provide a programming API for the resolver

[pfmoore]

The fact that this is being developed as a standalone project may mean this is obvious, but it would be good to consider if the resolver could have a documented/supported API. One of the big areas where people currently importing pip have very few alternative options is when looking at "what would pip install given this set of requirements?" Having pip's resolver available as a standalone library would potentially be a useful option for such people.

Note - I understand how much work maintaining such an API could be, so I'm completely OK with the resolver being designed solely as a component of pip, if that's easier to do. But it's probably worth considering the possibility.

[pradyunsg]

I do intend for this to be reusable and yes, having a documented and supported API is definitely something I'll be doing, hopefully this summer. :)

[pradyunsg]

I'll close this since this is definitely happening and an open issue for this isn't really needed. :)