Add option to only allow prerelease version for "top level" packages

[taranlu-houzz]

What's the problem this feature will solve?

• I have a private package repo with pre-release versions of internal packages that are in-development.
• I use pipx to install packages, including for testing in some cases.
• Using --pre seems to apply to all dependencies, as well as the target package. In some cases, this causes things to break (e.g. "AttributeError: cython_sources" with Cython 3.0.0a10 yaml/pyyaml#601) when attempting to install my pre-release packages like this: pipx install <internal package> --pip-args="--index-url=<internal host:port> --trusted-host=<internal host> --pre" --python <path to pypy>

Describe the solution you'd like

It seems like it could help if there was a more specific option, maybe something like --pre-no-deps that would only allow for installing pre-release versions of the top level packages that are specified.

Alternative Solutions

N/A

Additional context

• I am using pypy.

Code of Conduct

• I agree to follow the PSF Code of Conduct.

[taranlu-houzz]

Guess I posted this too quickly.. For future reference, it makes sense to just specify the exact version to install directly and not use the --pre flag at all.

E.g. pipx install <internal package>==1.0.0a3 --pip-args="--index-url=<internal host:port> --trusted-host=<internal host>" --python <path to pypy>