Installer should show a warning if the last commit/upload date was more than 6 months ago

[ewdurbin]

Originally reported by: Bibhas Debnath (Bitbucket: bibhas, GitHub: bibhas)

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There are lots of deprecated and unmaintained libraries out there. As there is no standard format to declare a project deprecated, I think it'd be helpful to the user if Pypi showed an warning while installing the package if the last commit date(if available) or the upload date is more than 6-8 months.

There might be cases where the library doesn't need updating because they deal with technologies that don't change much(e.g. file system) and can work fine. But they'd probably be minority compared to libraries that do need updating(e.g. any wrapper of APIs, 3rd party package, dbms drivers etc).

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• Bitbucket: https://bitbucket.org/pypa/pypi/issue/264

[di]

Essentially a duplicate of pypi/warehouse#345, plus something that really belongs in pip instead.