hiya folks! does anyone have a good resource for pex platform strings? a little new to building pex files and while i can create them witthout specifying platforms in the appropriate environments, when i try to specify the suite of platforms i want to be compatible with i run into a whole lot of dependency hell (specified versions not available for the platform i specified). Would love a way to call a utility in my environment that would return hte appropriate pex stringn

It’s a tricky topic..I started documenting it at https://www.pantsbuild.org/v1.29/docs/python-platforms but didn’t finish because it’s hard to document in a way that’s correct and still understandable It’s one of my TODOs to finish that.

Would love a way to call a utility in my environment that would return hte appropriate pex stringn

What do you mean? Like a utility to run in the desired platform and get back the proper platform string to use?

a utility to run in the desired platform and get back the proper platform string to use?

yes!

If you haven’t yet, I recommend running Pex directly when iterating on this. While the Pex docs are really really stale (we don’t have the keys to the site anymore 😶), the error messages for invalid strings are more informative.

pipx install pex

then

pex --platform=manylinux2014_x86_64-cp-38-cp38 cryptography -o foo.pex

, for example Let me check on that utility. I think

setuptools

has a function to get all supported platform strings, iirc

The utility is Pex itself. A bit hidden, but, for example, on any given machine just:

$ curl -sSL <https://github.com/pantsbuild/pex/releases/download/v2.1.15/pex> -O
$ /path/to/python/of/interest pex --help

If you read the help for

--platform

the current platform string is noted. For example, on my machine, some of those are:

$ for py in python{2.7,3.{6,7,8}} pypy; do $py pex --help | grep -A2 "current interpreter at"; done
                        current interpreter at /usr/bin/python2.7 the full
                        platform string is manylinux2014_x86_64-cp-27-cp27mu.
                        To find out more, try `pex --platform explain`.
                        current interpreter at /usr/bin/python3.6 the full
                        platform string is manylinux2014_x86_64-cp-36-cp36m.
                        To find out more, try `pex --platform explain`.
                        current interpreter at /usr/bin/python3.7 the full
                        platform string is manylinux2014_x86_64-cp-37-cp37m.
                        To find out more, try `pex --platform explain`.
                        current interpreter at /usr/bin/python3.8 the full
                        platform string is manylinux2014_x86_64-cp-38-cp38. To
                        find out more, try `pex --platform explain`.
                        current interpreter at /opt/pypy/bin/pypy the full
                        platform string is
                        manylinux2014_x86_64-pp-273-pypy_73. To find out more,

oh nice!

Do you have a custom wheelhouse you point Pex at with --index or --find-links?

this was literally my first attempt to build a pex binary

OK