Openstack uses Zuul for project gating and one of the features of Zuul is cross repository dependencies (CRD). Zuul will detect CRDs in git commit messages to allow it to arrange patchsets (in order) before scheduling them for build and test.
The problems with having only a ‘depends-on’ reference:
To help alleviate these issues this plugin adds the following:
Detailed information about this plugin can be found in the documentation.