Example for Publishing Docker images to GitHub Packages broken

[bananer]

What article on docs.github.com is affected?

https://docs.github.com/en/actions/guides/publishing-docker-images#publishing-images-to-github-packages

What part(s) of the article would you like to see updated?

In the example file, the tag is specified like this:

docker.pkg.github.com/${{ github.repository }}/octo-image:${{ github.ref }}

However, the variable github.ref resolved to something like refs/heads/my_branch_name (as documented).

This causes the step to fail:

error: invalid tag "docker.pkg.github.com/bananer/my-repo/mps:refs/heads/my_branch_name": invalid reference format
Error: buildx call failed with: error: invalid tag "docker.pkg.github.com/bananer/my-repo/mps:refs/heads/my_branch_name": invalid reference format

Additional information

My goal is to publish to a docker tag matching my branch name, assuming this is also the intent of the example. Seems like there is no official way to get the branch name without refs/heads/ prefix in the official docs.

[welcome]

Thanks for opening this issue. A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[janiceilene]

Thanks for opening an issue @bananer! I'll get this triaged for the team to take a look 👀

[skedwards88]

Thank you for opening this issue! ✨ We have an update (now live) that no longer uses github.ref in the tag name, so I believe this should be resolved.