Add conda build for ARM architectures

[camposandro]

I noticed that conda is currently unable to resolve the latest hats v0.4.0 release in ARM-based architectures since no cds-healpix conda build exists for ARM Mac/Linux. From your previous releases on PyPI it seems like it's possible. Do you know if specifying those build platforms in conda-forge.yml would be enough to tackle this issue? Relates to #11.

[ManonMarchand]

Yes we got a ci failure during the release (see https://github.com/cds-astro/cds-healpix-python/actions/runs/11384977564). One of our dependencies (pyo3) took more than 6h to build.

It might potentially be fixed when PyO3/maturin#2256 is fixed.

[ManonMarchand]

Wait. You have an issue on MAC? This is unexpected, that part did not fail 😦
Can you confirm?

[camposandro]

Yes, I'm testing on a Mac M2. Installing via pip works like a charm, while conda install conda-forge::cdshealpix is unable to resolve the package: PackagesNotFoundError: The following packages are not available from current channels: - conda-forge::cdshealpix.

[fxpineau]

No file corresponding to your needs here?
Which MacOS and Python versions do you have?
Oups ... with conda... thus here (not as easy to understand as pipy).

[fxpineau]

True: contrary to pipy, we have never built conda packages (neither cdshealpix nor mocpy) for Mac with ARM processors,
check the list here.
We have to check how to include osx-arm64 to our conda-forge recipes...
Is it blocking for you (or not since you succeed with pypi)?

[fxpineau]

Meanwhile, a (unsatisfactory) solution is to create a x64 conda environment, see this stackoverflow question.

[camposandro]

It'd be great if we could have this on the short-term, but it isn't pressing. Thanks for having a look at it!

[fxpineau]

As a first step, this PR on conda-forge must be accepted (not in my hands). So, wait and see....