Support for multi-platform builds?

[itavero]

Does this action have the ability to do a multi-platform build?

Currently the resulting image from the GitHub workflow is targeted at linux/amd64, but I also need an linux/arm64/v8 build.

[kubo6472]

In need of this too (I made this me too comment, since this repo does not seem to have that much traction currently. Sorry for the email notification OP :D)

[venkatamutyala]

Hey @kubo6472 @itavero Apologies for the delay. I meant to follow up late last week. We have recently stopped usage of this action ourselves and been migrating to the manifest shown below. It should be a drop in replacement if you are using ghcr.io but also give you flexibility to leverage caching, multi-architecture builds and much more.

name: Publish to GHCR.io

on: [push]

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build_tag_push_to_ghcr:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@68827325e0b33c7199eb31dd4e31fbe9023e06e3 # v3

      - name: Setup Docker buildx
        uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3.3.0

      - name: Log into registry ${{ env.REGISTRY }}
        uses: docker/login-action@0d4c9c5ea7693da7b068278f7b52bda2a190a446 # v3.2.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch,prefix=
            type=ref,event=tag,prefix=
            type=sha,format=short,prefix=
            type=sha,format=long,prefix=

      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@ca052bb54ab0790a636c9b5f226502c73d547a25 # v5.4.0
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          provenance: false
          cache-from: type=gha
          cache-to: type=gha,mode=max

ref for multi-platform builds:

https://github.com/docker/setup-qemu-action?tab=readme-ov-file#inputs https://github.com/docker/setup-buildx-action?tab=readme-ov-file#inputs

[kubo6472]

I've been using build-push-action @v6 along with qemu, buildx and caching. I thought you made some magic potion that can do this automagically.

[venkatamutyala]

@kubo6472 not that I know of. We were heavily opionated and i believe our action only supported x86 builds. I'd recommend switching back to what you had before or leveraging the example I provided above.