Open Stack

Hi,

We recently fixed a subtle but important bug related to how Zuul checks
out repositories it uses to find Ansible roles for jobs.

This may result in a behavior change, or even an error, for jobs which
use roles defined in projects with multiple branches.

Previously, Zuul would (with some exceptions) generally check out the
'master' branch of any repository which appeared in the 'roles:' stanza
in the job definition.  Now Zuul will follow its usual procedure of
trying to find the most appropriate branch to check out.  That means it
tries the project override-checkout branch first, then the job
override-checkout branch, then the branch of the change, and finally the
default branch of the project.

This should produce more predictable behavior which matches the
checkouts of all other projects involved in a job.

If you find that the wrong branch of a role is being checked out,
depending on circumstances, you may need to set a job or project
override-checkout value to force the correct one, or you may need to
backport a role to an older branch.

If you encounter any problems related to this, please chat with us in
#openstack-infra.

Thanks,

Jim