matrix of profile_list options

I would like to give users an option to select independently between machine options (e.g. cpu_limit) and notebook image.

I imagine that this may be possible already, either through some profile_form_template magic or by supplying a callable as profile_list. But I thought I would ask for suggestions here before diving too deep into either of these. Perhaps the devs already have a good idea about the easiest way to accomplish this.

[jcrist]

There’s also https://github.com/ResearchComputing/jupyterhub-options-spawner, which may be of use here.

[rabernat]

Wow, options-spawner looks amazing! Perhaps we can accomplish what we need with that, without any changes to KubeSpawner.