How to avoid git push --force to a pull request(PR)?

[Liu, Xin]

cc hotspot-dev. 
I found that skara-dev is mainly for skara developers. my question is for general hotspot developers. 

thanks,
--lx


________________________________________
From: Liu, Xin
Sent: Tuesday, November 24, 2020 5:59 PM
To: skara-dev at openjdk.java.net
Cc: Tobias Hartmann
Subject: How to avoid git push --force to a pull request(PR)?

Hi, Skara developers,


Tobias suggested not to use force push here
https://github.com/openjdk/jdk/pull/1073#issuecomment-726549523


Sometimes, I use git push --force to a private branch, which maps to an ongoing PR.
What I do is to update my branch to TIP, rebase my changes to it and then "git push --force" to my branch remotely.  Skara remarks the PR “force pushed ” eg. https://github.com/openjdk/jdk/pull/1179


Yes, I admit that it would ruin the "incremental webrev".  I do it for the following two reasons.
1) the reviewing process lasts too long. I have to update the base of my private branch, or it isn't mergeable.
Other developers may have changed the common code when you are working on your PRs, right?  /integrate will fail because of conflicts.

2) I have to update the base because of testing.
Openjdk now contains the sanity check workflow. https://github.com/openjdk/jdk/blob/master/.github/workflows/submit.yml
I'd like to pass them all before integrating.  Sometimes, I run into failures but my PR is not the culprit. The build breakage and regression are usually rapidly fixed in the master branch.

I understand I can always ditch the old PR and start over, but all comments in the old PR will lose in this way.  On the side, I also feel guilty to use force push frequently.
May I know if Skara has other option to help me out?


I read this blog (https://julien.danjou.info/rant-about-github-pull-request-workflow-implementation/), it declares the dilemma comes from github PR mechanism.
but that blog was 7-year-old, I am not sure that if github has sorted it out or not. Even github hasn't, is that possible to be solved by Skara?

thanks,
--lx