bug#74604: 30.0.92; FR: M-x package-upgrade - offer an option to show a diff on upgrade

[Philip Kaludercic]

Daniel Mendler <mail@daniel-mendler.de> writes:

> This is a feature request for the security wishlist. When upgrading
> package it would be good to show a diff between the new and old package
> files. Such an option could help performing review casually as part of
> the upgrade process and may improve the security of the package
> archives. More eyes would look at new package versions. This would make
> it harder to inject malicious code either via the source repository or
> via attacks on the package archives.

That sounds like a good option to have!  I'll look into adding something
like this via a user option that adjusts how to confirm a package upgrade.

Note that package-vc has something similar with the
`package-vc-log-incoming' command.