'pip wheel --no-deps' doesn't work with extras on the new resolver

[rouge8]

What did you want to do?

pip wheel --use-feature=2020-resolver --no-deps splitio_client[cpphash,redis]==8.2.0 -w wheels/ should download splitio_client-8.2.0-py2.py3-none-any.whl like pip wheel --no-deps splitio_client[cpphash,redis]==8.2.0 -w wheels/ does.

On its own this is an artificial case, but I broke it out of a 150 line requirements file that was failing to find the issue. :)

Output

With --use-feature=2020-resolver

$ pip wheel --use-feature=2020-resolver --no-deps splitio_client[cpphash,redis]==8.2.0 -w wheels/

(no output)

Without --use-feature=2020-resolver

$ pip wheel --no-deps splitio_client[cpphash,redis]==8.2.0 -w wheels/
Processing /Users/andy/Library/Caches/pip/wheels/5a/9a/1e/de8c54b6448f1a2615e76d5d2e7395342f9d1370865d2c0566/splitio_client-8.2.0-py2.py3-none-any.whl
  Saved ./wheels/splitio_client-8.2.0-py2.py3-none-any.whl
Skipping splitio-client, due to already being wheel.

[uranusjr]

Can reproduce with master.

[uranusjr]

Ah, I think I know the problem. An extra-ed package is implemented as a virtual package with a dependency on its non-extra-ed self, but --no-deps makes the new resolver skip all dependencies, including that.

Note that wheel has nothing to do with the problem. It can be reproduced with install as well. The base package won’t be installed if extras are specified in conjunction with --no-deps.