Comment 7 for bug 1730931

My spider-sense tells me that fetching the spec (and associated files from the distgit) from a (maybe outdated if we use current-tripleo) .src.rpm is not the best idea, but we should be able to do it without modifying DLRN code.

In [1] we copy the project source Git to DLRN/data/<project_name>. We could fetch the .src.rpm, extract everything but the source tar.gz (something we can detect by parsing Source0 in the spec), then copy that into DLRN/data/<project_name>_distro. We are already passing the --dev switch to DLRN, so that should be transparent.

We could do all that in dlrn-build.yml, ideally with a toggle so we can still reuse the playbook outside the OpenStack infra and then fetch the distgit from GitHub.

I still have some other doubts about this approach:

- How can we detect the proper file name for the .src.rpm to fetch? We know it should be {{ project_name_mapped.stdout }}-*.src.rpm, but we cannot use that wildcard with wget.

- We would still be cloning the rdoinfo repo from GitHub, do we have plans to mirror that inside the OpenStack infra?

[1] - https://github.com/openstack/tripleo-quickstart-extras/blob/8d85a55436e8a93b8081b351f06ad4100e6dd825/roles/build-test-packages/tasks/dlrn-build.yml#L50-L64