How do I check that a PR does not accidentally revert a submodule revision?

Hi,

I just experienced a problem, in which a subsequent PR by another contributor accidentally reverted a submodule update committed by a prior PR. I suspect that the problem came from rebasing a PR to a recent master. Is there a way to check whether a PR doesn’t accidentally revert such a change? Or is to generalize the problem, is there a check for reverting any change made by prior PR?

Regards,
Marek

That’s because submodules are tricky, every contributor should remember to check they are properly updated.

As for implementing a safe check, you could add to your repository a Git pre-commit hook (or another hook) that executes a script that will either updated or check the submodule pointer.

https://git-scm.com/book/en/v2/Customizing-Git-Git-Hooks

Via Git hooks, custom scripts and proper submodules strategy settings, you should be able to obtain complete control over them and avoid similar problems.