Bamboo build YAML: Trigger build via cron on specific BitBucket Git branch only

Question

I have a project's code on BitBucket Git repo. At the moment Bamboo executes YAML-based Build Plan successfully with every commit, on every Git branch.

Now I want to add another trigger to let Bamboo execute build of only master branch once a week. I've tried by adding this YAML lines:

triggers:
  - remote
  - cron:
      expression: 0 30 8 ? * WED

BUT: Bamboo seems to take code from that Git branch he executes the last build on. So for instance, if I commit code to branch foo the afternoon before Wednesday morning, Bamboo executes build of code from this branch foo immediately after the commit, which is fine and expected. But Bamboo also triggers build of this branch foo at 8:30 am on Wednesday.

How do I tell Bamboo YAML file to launch build of master branch code every Wednesday morning?

Thanks

Christian

PS: Bamboo version 8.1.1.

Answer 1

Seems I've found a solution:

branch-overrides:
  - master: # Modification of steps/triggers to apply with Git master branch builds only!
      triggers:
        - polling: # Launch job every wednesday morning
            cron: 0 30 8 ? * WED

Unfortunately, this modification of bamboo.yml itself does not trigger a build, nor does it launch the job on next wednesday! At least according to my experience, you have to commit "something else" (like source code files) to get Bamboo recognize your wish to launch build of master branch every wednesday morning.

Christian

Update on wednesday, 2022-05-25: Doesn't work for unknown reasons, I think cron expression should make Bamboo launch build this morning, but it doesn't happen.

Weird.