Use Project-URL metadata field to get a PyPI package's homepage URL

[kemzeb]

Resolves #33085.

[kemzeb]

Still need to write some integration tests, but I tested this manually with a personal PyPI project that uses the Project-URL field to set the homepage. I uploaded it using the instructions from the Gitea docs and it uploaded just fine. I navigated to the package's homepage and can now see the project directory:

Before:

After:

Couple things:

• I kept the Home-page metadata field around. Not sure if there are packages that use this field but just in case I kept it around. Let me know if we should just remove it
• Since we have to loop over these URLs, should we set some arbitrary limit as to the number of URLs we should loop over?

Edit:

BTW, here are some references I used:

• Finding the "project_urls" key in the twine repo: https://github.com/pypa/twine/blob/2386ca5300cd7bde59432834d362c07de61e9a53/twine/package.py#L120
• Project-URL metadata field: https://packaging.python.org/en/latest/specifications/core-metadata/#project-url-multiple-use

[kemzeb]

Going to open this. I did modify an integration test to test for project URL metadata but the existing tests are dependent on each other which makes it harder to add more. Let me know if I should do something about this

[kemzeb]

I understand the tests a tad more and was able to add the necessary coverage tests

[wxiaoguang]

Overall LGTM

I think here it should use project_urls before home_page

[kemzeb]

653fc4c