Poetry: Poetry does not install from wheels on macOS Big Sur

[williammck]

• [x] I am on the latest Poetry version.
• [x] I have searched the issues of this repo and believe that this is not a duplicate.

• [x] If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: macOS Big Sur 11.0.1 on Apple Silicon

• Poetry version: 1.1.4
• Link of a Gist with the contents of your pyproject.toml file: https://github.com/crimsobot/crimsoBOT/blob/c00966011f5e829c097f0f1ce77e0b785d0d23ab/pyproject.toml

Issue

When using Poetry on Big Sur, poetry.installation.chooser.Chooser is not recognizing available macOS wheels.
e.g. Poetry uses cryptography-3.0.tar.gz instead of cryptography-3.0-cp27-cp27m-macosx_10_10_x86_64.whl.

This has been fixed in https://github.com/pypa/packaging/pull/319 (v20.5 and above), however it appears that Poetry is using packaging v20.4.
I've tracked it down to https://github.com/python-poetry/poetry-core vendoring in packaging v20.4, as poetry.utils.env.VirtualEnv.get_supported_tags is using ~/.poetry/lib/poetry/_vendor/py3.8/poetry/core/_vendor/packaging/tags.py as the script source on my machine.

I'm happy to put up a PR for this both here and in poetry-core, I just wasn't sure how to proceed with the vendoring there and how it ties back to here.

If there's any clarification I can provide, let me know :)

[donaldguy]

For a sketchy workarount in the meantime

pip=$(which pip)
pushd $PWD
cd "$(dirname $(which poetry))/../lib/poetry/_vendor/"
cd "py$( python -V | grep -o '[23]\.[0-9]\+')"
cd poetry/core/_vendor
sed -i '' 's/packaging==20.4/packaging==20.5/' vendor.txt
$pip install -t $PWD --upgrade -r vendor.txt
unset pip
popd

[williammck]

For a sketchy workarount in the meantime

Feels weird but works (changed mine to install packaging==20.7 since that's latest).
Also calling out that virtualenv still has wheels for pip 20.2.2 packaged with it, I needed to run poetry run pip install -U pip so that pip would install macOS wheels without erroring.

But with those two changes, seems like things are working... so one upstream dependency and then figuring out what all's in Poetry that needs changing.