Issue: customManagers:dockerfileVersions does not detect Debian packages with deb datasource

[cospeedster]

How are you running Renovate?

Self-hosted Renovate CLI

Which platform you running Renovate on?

Other (please specify)

Which version of Renovate are you using?

latest

Please tell us more about your question or problem

Hi Renovate team,

I am trying to use the customManagers:dockerfileVersions preset to update Debian packages in a Dockerfile, leveraging the deb datasource.

However, Renovate does not seem to recognize or update these dependencies as expected. Renovate does not create any PRs or issues for these dependencies. There is no indication in the logs that the deb datasource is being used.

I have created a minimal reproduction repository here: cospeedster/renovate-dockerfileVersions-with-deb-issue

Is this use case supported? If so, is there a specific configuration required to enable deb datasource detection within Dockerfiles using customManagers:dockerfileVersions? If not, is there a recommended workaround or is this a bug?

Thank you for your help!

Logs (if relevant)

Logs

 INFO: Dependency extraction complete (repository=<redacted>, baseBranch=main)
       "stats": {
         "managers": {"dockerfile": {"fileCount": 1, "depCount": 1}},
         "total": {"fileCount": 1, "depCount": 1}
       }

[RahulGautamSingh]

Three things:

1. Logs are very less, please share full logs
2. Your reproduction has registryUrl which uses http not https maybe that's the issue in the reproduction?
3. Check the usage guidelines for using deb datasource: https://docs.renovatebot.com/modules/datasource/deb/#usage-example