Hi! Regarding hermetic python - saw this blogpost and

pants.backend.python.providers.experimental.pyenv

. First of all, super exciting and thank you! AFAIU, currently, this is allowing to use the hermetic python version for local runs, e.g. all of

pants run

and

pants test

. However, it seems that

pants package

still creates a pex without the hermetic version and relies on system python. Question - 1. Did I understand correctly or am i missing a functionality? 2. If i did, is it planned to use the hermetic version inside packages as welll? Thank you.

Once you package a

pex_binary

it's out of Pants' hands. the target itself has a few knobs/levers for controlling how Pex discovers interpreters and selects them. Like https://www.pantsbuild.org/docs/reference-pex_binary#codeshebangcode and https://www.pantsbuild.org/docs/reference-pex_binary#codeinterpreter_constraintscode

I understand, thank you. Does it make sense to copy a standalone build into the pex (using resources for example) and point the shabang to run this version?

I think you might have a chicken-and-egg problem there. 🙂 You might poke around https://github.com/a-scie for a way to ship a binary that embeds PythonBuildStandalone along with a PEX. Other's have done it, and I hear there's plans for Pants to help you build this as well.

Perfect, thanks:)

@alert-psychiatrist-14102 what is your use case? Pex tracks this here: https://github.com/pantsbuild/pex/issues/2096, and although it will be a 13 years later dream realized for Pex, the coming of containers in the intervening time period seems like it has mainly killed the need; so I'm interested in use cases this continues to be useful for.

Hi @enough-analyst-54434! We are building a desktop application that needs access to camera and additional hardwate devices. Contenarizing is not a good option for us, as we need access to the raw drivers. Things get even more complicated when we run on macos. So we're running pex directly on the host.

Ok, makes sense. Thanks. The a-scie projects, a-scie/lift (

science

), may be useful then.

Learned more about scie - beautiful and elegant 👏