dry run fails when no repo is provided

[Berjou]

Hi.

I was not able to make a successful dry run build without providing a dummy repo, which seems to be an odd behavior since the goal of the dry_run setting is to not push the builded image, so the repo argument should not be necessary.

Is this behavior intended, or is there some technical difficulty to provide a more logical behavior?

[ashwilliams1]

This is expected. The repo field is used to tag the image and if the repo is not provided, it cannot be properly tagged. The intended purpose of dry_run is to perform every task except pushing to the registry. This helps teams verify they have everything configured correctly before pushing, and also helps teams debug issues without pushing.