Encoding python runtime variant in build string

[h-vetinari]

Currently, the default CONDA_PY in the build string resolves to py37 for both cpython & pypy. It would help IMO to see immediately from the artefact name for which python variant a package has been built.

Example for a current numpy build (using pypy37 instead of py37 for the pypy variant)

• linux-64/numpy-1.21.1-py37h038b26d_0.tar.bz2
• linux-64/numpy-1.21.1-py37h620df1f_0.tar.bz2 --> linux-64/numpy-1.21.1-pypy37h620df1f_0.tar.bz2

This would also apply if conda-forge ever packages other runtimes, e.g. conda-forge/staged-recipes#13019

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Since defaults doesn't distribute pypy, I originally considered this more of a conda-forge problem and had opened conda-forge/conda-forge.github.io#1479, but was then asked to open the issue here.

[h-vetinari]

Now that anaconda hired the pyston devs, this is going to become more relevant here as well. :)

[github-actions]

Hi there, thank you for your contribution!

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Thanks!

[h-vetinari]

Ah damn, missed the initial ping here. Could this be reopened please?

[h-vetinari]

@mbargull @kenodegard @jezdez @beeankha could someone reopen this issue please?