Merge branch 'disable-automatic-rc-pipelines' into 'master'

Don't create pipelines when preparing RCs

Closes release-tools#423

See merge request gitlab-org/gitlab!30174

.gitlab-ci.yml

@@ -25,6 +25,13 @@ workflow:
   rules:
     # If `$FORCE_GITLAB_CI` is set, create a pipeline.
     - if: '$FORCE_GITLAB_CI'
+    # As part of the process of creating RCs automatically, we update stable
+    # branches with the changes of the most recent production deployment. The
+    # merge requests used for this merge a branch release-tools/X into a stable
+    # branch. For these merge requests we don't want to run any pipelines, as
+    # they serve no purpose and will run anyway when the changes are merged.
+    - if: '$CI_COMMIT_BRANCH =~ /^release-tools\/\d+\.\d+\.\d+-rc\d+$/ && $CI_MERGE_REQUEST_TARGET_BRANCH_NAME =~ /^[\d-]+-stable(-ee)?$/ && $CI_PROJECT_PATH == "gitlab-org/gitlab"'
+      when: never
     # For merge requests, create a pipeline.
     - if: '$CI_MERGE_REQUEST_IID'
     # For `master` branch, create a pipeline (this includes on schedules, pushes, merges, etc.).