Re: [PATCH 0/1] gitlab-ci: Only push docker images to mainstream registry from /master

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 10/27/21 14:34, Daniel P. Berrangé wrote:
> On Wed, Oct 27, 2021 at 02:26:58PM +0200, Gerd Hoffmann wrote:
>>> Notably the latter is more restrictive that git branch names. We could
>>> assume users always have "sensible" branch names that are less than
>>> 128 chars and only alpha-num characters plus dash/underscore. This
>>> would be fine for my personal branch naming, but I wonder if anyone
>>> uses wierd branch names that would violate docker tag name rules ?
>>
>> /me uses slashes in branch names, i.e.
>>
>> queue/$topic for patch queues
>> $hostname/$subject for my development branches.
> 
> Ok, good to know. So that example clearly rules out use of git branch
> names as docker tags.

CI_COMMIT_REF_SLUG should work:

- CI_COMMIT_REF_NAME The branch or tag name for which project is built.

- CI_COMMIT_REF_NAME in lowercase, shortened to 63 bytes, and with
  everything except 0-9 and a-z replaced with -.
  No leading / trailing -. Use in URLs, host names and domain names.