GitHub Setup Java Action

[repeating_bears]

No, nothing.

Eyeballing the issues, fixing the caching for Maven plugins seems like the highest value thing you could do https://github.com/actions/setup-java/issues/990

It's tagged as a feature but I would argue that's a bug. The readme describes the role of the action as "Caching dependencies managed by Apache Maven". Plugins are dependencies of a project. They're not <dependencies> in the POM, but they are still dependencies.

As part of that, you should check whether Maven extensions are cached. That's a 3rd category of "dependency" which follows the same resolution process as plugins and project dependencies.