Send Zulip notifications for autorebase failures

Use the GitLab-to-Zulip username map available in the BIND 9 QA
repository to determine the Zulip username of the developer who happened
to author a breaking base branch change, so that a Zulip notification
can be triggered for that developer.

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3c67ccbae524346381831ac69d43c0287d91eb3c..390a5694feb2a9639c43e6bfbbcd37929116d66a 100644 (file)
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2672,7 +2672,13 @@ merged-metadata:
           # Rebase failed; try applying recent commits from the base branch on top of the branch being rebased to determine which one introduces conflicts
           git rebase --rebase-merges "${CI_COMMIT_SHA}" "${BASE_COMMIT}" || true
           CONFLICT_COMMIT="$(git rev-parse REBASE_HEAD)"
-          CONFLICT_COMMIT_AUTHOR="$(git log --max-count=1 --pretty="@%al" "${CONFLICT_COMMIT}")"
+          CONFLICT_COMMIT_AUTHOR_LOGIN="$(git log --max-count=1 --pretty="%al" "${CONFLICT_COMMIT}")"
+          CONFLICT_COMMIT_AUTHOR_USERNAME="$(curl -m 5 -s "https://gitlab.isc.org/isc-projects/bind9-qa/-/raw/main/releng/users.json" | jq -r ".${CONFLICT_COMMIT_AUTHOR_LOGIN}" || :)"
+          if [ -n "${CONFLICT_COMMIT_AUTHOR_USERNAME}" ] && [ "${CONFLICT_COMMIT_AUTHOR_USERNAME}" != "null" ]; then
+            CONFLICT_COMMIT_AUTHOR="@**${CONFLICT_COMMIT_AUTHOR_USERNAME}**"
+          else
+            CONFLICT_COMMIT_AUTHOR="\`${CONFLICT_COMMIT_AUTHOR_LOGIN}\`"
+          fi
           CONFLICT_COMMIT_MERGE="$(git log --reverse --merges --pretty="%H" "${CONFLICT_COMMIT}..${BASE_COMMIT}" | head -1)"
           read -r CONFLICT_COMMIT_MERGE_REQUEST_PROJECT CONFLICT_COMMIT_MERGE_REQUEST_ID < <(git log --max-count=1 "${CONFLICT_COMMIT_MERGE}" | sed -n -E 's|^\s*See merge request ([a-z-]+/bind9)!([0-9]+).*|\1 \2|p' | head -1)
           REASON="merge conflict introduced by a change in the base branch"