Add update-pr-branch action to update PR branch

[tkoyama010]

Overview

The job of the action is to help click "Update branch" button for us. Designed to work with the auto-merge and "Require branches to be up to date before merging" options. It will update the newest open PR that match the below conditions

• The PR has the auto-merge option enabled
• The PR has 1 approvals and no changes-requested review
• The PR branch has no conflicts with the base branch
• The PR branch is behind the base branch

Details

• Update PR Branch Action

[tkoyama010]

LGTM

[github-actions]

✅ Approving this PR because tkoyama010 said so in here

[larsoner]

I see how in principle this could help. But in practice if this had been in place when dependabot opened a ton of PRs, as soon as one was merged all of them would have been updated, creating quite a backlog/overkill in CI jobs. I almost think it's easier to manually update-and-merge one by one?

[tkoyama010]

I see how in principle this could help. But in practice if this had been in place when dependabot opened a ton of PRs, as soon as one was merged all of them would have been updated, creating quite a backlog/overkill in CI jobs. I almost think it's easier to manually update-and-merge one by one?

Thank you for your comment! This is actually to select one of the PRs and update only that one. Does that address your concern?

[larsoner]

Ahh okay I misunderstood -- let's try it then!