Allow users to curate their own hosted index

[di]

Originally raised by @tiran in a mailing list thread:

...how about we allow users to create their own views on PyPI index? I brought up this idea of curated content in the past.

Index views would work like a filtered PyPI that blocks and hides packages. Index views can either allow all packages and block packages by simple regex. Or a view blocks all packages so users can cherry-pick packages. A more advanced version of the feature could even support cherry-picking of specific package versions.

This feature would allow user to block unwanted content:

pip install \
    --index-url https://pypi.org/view/cheimes/mycontentview \
    --extra-index-url https://mycompany.local/index \
    -r requirements.txt 

[tiran]

Thanks Dustin!

In the same thread somebody mentioned that @VanL had a similar idea.

[mm]

Would love to discuss more/help contribute to this one! Sounds like an exciting feature to build out.