Suggestions for improving GitHub PR to Gerrit CR workflow?

[yang]

Thank you for this wonderful tool!

I have a GitHub PR to Gerrit CR workflow, and am wondering about general advice to improve on this.

Workflow is simple, looks something like the below.

Issues:

• Each time the PR is updated, this results in a new Change-ID and thus new Gerrit CR. Is there a way to have this update the existing CR rather than create a new one? Basically, to have the change-id be stable per PR number.
• For the reviewers, how do you use GITHUB_PR_REVIEWER_APPROVER? I guess - is there any documentation available on how to use labels, repeated labels, etc. that the API reference mentions?
• If user submits PR, copybara runs, and then user sets a reviewer—is there a way to also set the reviewer in Gerrit?
• Any other suggested improvements or typical things you'd do in this setup?

Thank you!

core.workflow(
    name = "public_pr_to_private_cr",
    origin = git.github_pr_origin(
        url = publicUrl,
        #use_merge = True,
        #baseline_from_branch = True,
    ),
    destination = git.gerrit_destination(
        url = "https://plasmic.app/a/yangcopytest",
        fetch = 'master',
        reviewers = ['${GITHUB_PR_REVIEWER_APPROVER}']
    ),
    origin_files = glob(["studio/**"]),
    destination_files = glob(['**'], exclude = ["copy.bara.sky", "private"]),
    authoring = authoring.pass_thru("Copybara <copybara@example.com>"),
    mode = 'CHANGE_REQUEST',
    transformations = [
        core.move("studio", ""),
        metadata.replace_message(
                "${GITHUB_PR_TITLE}\n\n" +
                "${GITHUB_PR_BODY}\n\n" +
                "Closes #${GITHUB_PR_NUMBER}\n" +
                "https://github.com/yang/copytest/pull/${GITHUB_PR_NUMBER}",
                ),
    ],
)