Tyler BoddySpargo

> Is the PR still wanted? Thanks for keeping this updated, @AndydeCleyre. I, for one, am still interested in this PR!

> It doesn't appear to impact the resolver or pip's use of the requirements file but it is an unexpected change when updating to pip 23.3.x. I just wanted to...

One other thing that seems related to this: It's odd, and I think unexpected, that a package listed in the `via` comments of _itself_ when any extras are provided, a...

Thanks for pointing that out, @AndydeCleyre! Your counter examples helped me realize that there's another contributing factor. It seems that the redundant `via` output may only happen if there's a...

I would agree that specifying `--upgrade` seems unnatural and I would expect it to be unnecessary. I also wanted to point out some potential similarities with #1818. I believe both...

Thanks, @AndydeCleyre! I tried adding that option to our Makefile setup, but I'm unfortunately still getting the `ResolutionImpossible` exception. I expect that resolution is _not,_ in fact, impossible, but that...

I wanted to add another reproduction case, in case it helps hone in on a solution: ```sh echo "s3fs[boto3]==2023.1.0" > test.txt =1.26.100` in the input constraints). So, the resolver _should_...

> What tool are you planning to consume pyproject.toml with? My hope is that when performing `pip install oscrypto @ git+https://github.com/wbond/oscrypto.git@d5f3437ed24257895ae1edd9e503cfb352e635a8`, `pip` will be able to use `pyproject.toml` (or some...

> We'd probably need a `list[str | dict]` or something I think? Will have a think Would the `dict` option be used to support key-value pairs of extension name and...

> And then you just mount your own `.conf` files. I tried this, but: A) I still want to use templates, and B) I was still hitting issues when mounting...