Action scope

[Adirio]

Actions submit CheckRuns for different checks. Those CheckRuns owned by a commit, not by a PR. Therefore, when a new commit gets (force-)pushed, the CheckRuns that reports the result of this action is lost.

Could we retrieve the previous CheckRuns from the old commit on: pull-request: [synchronize] and push them to the new commit? I think the hard part here will be knowing the sha of the commit that holded the previous checks.

In this case the pseudo code would be:

on: pull-request: open
- create CheckRun with "in_progress" status
- perform the checks
- update CheckRun with results

on: pull-request: edit
- update CheckRun with "in_progress" status
- perform the checks
- update CheckRun with results

on: pull-request: synchronize
- find the previous commit hash
- create CheckRun with same result as CheckRun @ previous commit

[Adirio]

/cc @DirectXMan12 @vincepri

[DirectXMan12]

yep, we need synchronize. I think it's probably fine to just re-run the run on synchronize though -- it's not too expensive.