Action doesn't properly retag/push multi-arch images

[devnoname120]

Here it only pushes the image sha256:b7668e756aabb86369fde2a5e38f9d477b5fb75374e42b8611f6fa9d49b4c76c (amd64) dropping sha256:27495c4423c6d85a4fab5943b045f6f27906f08a218430bb0c858e352d3678f9 (arm64) entirely.

> Run docker pull ghcr.io/devnoname120/bridge-manager:42c8a5ccda3febb51b9a33a9ab3f0f938ca058ad
42c8a5ccda3febb51b9a33a9ab3f0f938ca058ad: Pulling from devnoname120/bridge-manager

[…]

Digest: sha256:27495c4423c6d85a4fab5943b045f6f27906f08a218430bb0c858e352d3678f9
Status: Downloaded newer image for ghcr.io/devnoname120/bridge-manager:42c8a5ccda3febb51b9a33a9ab3f0f938ca058ad
ghcr.io/devnoname120/bridge-manager:42c8a5ccda3febb51b9a33a9ab3f0f938ca058ad

> Run docker tag ghcr.io/devnoname120/bridge-manager:42c8a5ccda3febb51b9a33a9ab3f0f938ca058ad ghcr.io/devnoname120/bridge-manager:latest

[…]

> Run docker push ghcr.io/devnoname120/bridge-manager:latest

[…]

latest: digest: sha256:b7668e756aabb86369fde2a5e38f9d477b5fb75374e42b8611f6fa9d49b4c76c size: 1999

https://github.com/devnoname120/bridge-manager/actions/runs/12237224918/job/34133496623

---

I'm not entirely sure why we need to do the retag in a separate action but if we keep this then I suspect that the solution would be to manually pull each platform separately (docker pull only pulls for the local platform), and then use build imagetools to actually retag it:

docker buildx imagetools create -t ${{ inputs.image }}:${{ github.sha }} ${{ inputs.image }}:latest

IMO it's awkward and it would be much easier to (conditionally) retag to :latest in a step after the build rather than in a separate action (the one in this repository).

[devnoname120]

Related: beeper/bridge-manager#31