add stale action to replace prprocessor

[evgeni]

No description provided.

[evgeni]

I tried my best to translate the logic from https://github.com/theforeman/prprocessor/blob/master/config/close_inactive.yaml and https://github.com/theforeman/prprocessor/blob/master/scripts/close_inactive.rb into actions/stale.

Technically, this now gives week more time as the workflow first marks things as "stale" (after 90 or 30 days) and only then after 7 days closes it. We can fine-tune that, but I didn't feel like it's a bad thing.

It's also explicitly configured to only touch PRs, even if we have issues disabled in this repo.

[evgeni]

one thing that this does not do (and can't do too well), is removing the PR from the redmine.

I think that's OK tho?

[ekohl]

one thing that this does not do (and can't do too well), is removing the PR from the redmine.

I think that's OK tho?

We can implement this in the regular PR processor: when a PR is closed without being merged we can remove the link. That would then also work for manual actions.

[evgeni]

theforeman/foreman-infra#1896 - removes the cronjob
theforeman/prprocessor#180 - removes the code

[ekohl]

We can implement this in the regular PR processor: when a PR is closed without being merged we can remove the link. That would then also work for manual actions.

I think theforeman/prprocessor#182 would do that. At this point I haven't tried it out though.