How to specify both CPython and PyPy in a "matrix" env?

[gwerbin]

I want to test my application against both CPython and PyPy. Assuming I have all my desired versions installed using Pyenv, and assuming everything works fine using CPython alone, how can I configure Hatch to include both CPython and PyPy versions in a "matrix" env? Does it support strings like "pypy3.10"?

[ofek]

Yes it supports strings like that

[gwerbin]

Thanks @ofek , where is the set of valid version strings defined?

[ofek]

It's whatever virtualenv supports

[ofek]

FYI in the documentation I'm going to begin discouraging the use of pyenv now that we have these features:

• Implement Python management #970
• Automatically download Python distributions for virtual environments #1002

[gwerbin]

There's no intention to deprecate Pyenv support, is there? I suspect that at least some people would prefer to use Pyenv / python-build instead of letting Hatch manage this.

[ofek]

No, and that would be technically impossible. I just want to make explicit in the docs that it causes many issues generally speaking not just for Hatch.