Support --config-settings for uv pip install

[gotmax23]

• A minimal code snippet that reproduces the bug.

$ git clone https://github.com/aio-libs/yarl
$ cd yarl
$ uv pip install -C pure-python=true .
error: unexpected argument '-C' found

  tip: to pass '-C' as a value, use '-- -C'

Usage: uv pip install [OPTIONS] <PACKAGE|--requirement <REQUIREMENT>|--editable <EDITABLE>>

For more information, try '--help'.

$ pip install --help
  -C, --config-settings <settings>
                              Configuration settings to be passed to the PEP
                              517 build backend. Settings take the form
                              KEY=VALUE. Use multiple --config-settings
                              options to pass multiple keys to the backend.

• The current uv platform.

Linux x86_64

• The current uv version (uv --version).

uv 0.1.8

[charliermarsh]

I think this just went out in v0.1.9: #1833. Do you mind trying again?

[gotmax23]

Yes, it seems to work now. I tried to pass --verbose to view the stdout from the PEP 517 hooks to make sure the right thing was happening, but instead, it shows a bunch of resolver debug info and still eats the stdout. Ideally, this resolver debug output would be gated behind a --debug flag and the build backend output and other more pertinent information under --verbose --- or some similar separation/log levels.

[zanieb]

Thanks for your feedback, that idea is covered in #1569.

Let us know if anything else isn't working!