Setting tags not shown in the matrix example

[giordano]

Is this a docs issue?

• My issue is about the documentation content or website

Type of issue

I can't find what I'm looking for

Description

In the example for the workflow using the matrix, setting the tags isn't shown.

Location

https://docs.docker.com/build/ci/github-actions/multi-platform/

Suggestion

Do the tags only need to be set in the meta section?

I'm trying this:

      -
        name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY_IMAGE }}
          tags: type=raw,value=dependencies-latest

-
        name: Build and push by digest
        id: build
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./dependencies.dockerfile
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
          tags: ${{ steps.meta.outputs.tags }}

The build finishes but the push fails:

#15 exporting config sha256:702f28b89befc2ea0d12a904c3a353ccf80cb4be0d9770769b5839c9b997e53b done
#15 exporting attestation manifest sha256:65234ecf26b23171773d75ec90596e1d200641ca2e5d54a9a6ec327a2e7be124 done
#15 exporting manifest list sha256:e8b40fa8f621c7cd0a07cdafaaa3572809007aca2bcd2afc42a46cbeecf61800 done
#15 ERROR: failed to push ***/linuxdeploy:dependencies-latest: can't push tagged ref docker.io/***/linuxdeploy:dependencies-latest by digest
------
 > exporting to image:
------
ERROR: failed to solve: failed to push ***/linuxdeploy:dependencies-latest: can't push tagged ref docker.io/***/linuxdeploy:dependencies-latest by digest
Error: buildx failed with: ERROR: failed to solve: failed to push ***/linuxdeploy:dependencies-latest: can't push tagged ref docker.io/***/linuxdeploy:dependencies-latest by digest

Originally reported by @andy5995 in #19339 but closed by a stupid stalebot

[andy5995]

An example at https://github.com/andy5995/gh-action-build-deb/blob/4897ec2a4e645c1f31580becf733aa0721628e67/.github/workflows/docker.yml#L114

Basically, they should be added in the Meta step of the merge job.