02/02/2022, 1:48 AM
Any thoughts on what, if any, would be the equivalent of a hermetic python in bazel for pants? We'd really like to avoid using anything on system as much as possible since it's caused us issues in the past.


02/02/2022, 3:45 AM


02/02/2022, 4:43 AM
I'm nervous to say this because I know how many issues there can be getting Python to build so it could result in lots of support issues - but I would be curious to see Pants build Python for you, possibly a la Pyenv The Rules API design means that it would be fairly easy for us to swap out our current Python interpreter-discovery in favor of Python built by Pants - it's encapsulated fairly well already
We already have Pants installing Java and Scala for you iirc, along with Protoc, Shellcheck, etc I think the main places we leak out are: • discovering Python • discovering Bash to run some internal scripts • discovering unzip, zip, and tar to unpack and pack archive files • discovering Docker • when building a PEX, we default to the PATH being available because of sdists needing to be compiled


02/02/2022, 6:01 PM
@high-yak-85899: one thing that can work reasonably well, but doesn’t go as far as actually building a Python from scratch is: 1) limiting the interpreter search path to only pyenv, or only some other system python that you know is trusted, 2) bounding the version precisely to the relevant version in pyenv
that will unfortunately mean actually maintaining that version on user’s machines though… we can’t yet help with that.


02/02/2022, 6:02 PM
Okay, good to know what's possible now and that the idea is open for future versions!