How to integrate msys2 packages?

[ocroquette]

I need some tools like clang, gcc or cppcheck which are available as msys2 packages. Some seem to be available on conda-forge, I guess repackaged, but it is not clear which ones, what the mapping is, and if they are up-to-date.

I created a rattler-build recipe that downloads several msys2 packages and repackages them as a single conda package. It works, but it doesn't feel right.

What would be great is native support in pixi for msys2 packages, similarly to pypi. Would that be theoretically possible?