container.yml

name: Container Claus

on:
  push:
    branches:
      - 'master'
    tags:
      - 'v[0-9]+.[0-9]+*'

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      packages: write
      contents: read
    env:
      MAKEFLAGS: -j3
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm/v6
          - linux/arm/v7
          - linux/arm64
          - linux/ppc64le
    steps:
      - uses: actions/checkout@v4
      - uses: docker/metadata-action@v5
        id: meta
        with:
          images: |
            ${{ github.repository }}
          labels: |
            org.opencontainers.image.source=https://github.com/troglobit/mg/tree/${{ github.sha }}/
      - uses: docker/setup-qemu-action@v3
      - uses: docker/setup-buildx-action@v3
      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - uses: docker/build-push-action@v6
        id: build
        with:
          context: .
          labels: ${{ steps.meta.outputs.labels }}
          platforms: ${{ matrix.platform }}
          outputs: >-
            type=image,
            name=${{ github.repository }},
            name-canonical=true,
            push-by-digest=true,
            push=true,
            annotation-index.org.opencontainers.image.title=Mg,
            annotation-index.org.opencontainers.image.description=Micro Emacs text editor,
            annotation-index.org.opencontainers.image.url=https://github.com/troglobit/mg,
            annotation-index.org.opencontainers.image.licenses=Unlicense,
            annotation-index.org.opencontainers.image.revision=${{ github.sha }}
      - name: Export digest
        id: digest
        run: |
          platform=${{ matrix.platform }}
          arch="${platform#linux/}"
          echo  "arch=$arch" >> $GITHUB_OUTPUT
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          fn="/tmp/digests/${digest#sha256:}"
          echo "Saving $arch digest: $fn"
          touch $fn
      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: ${{ steps.digest.outputs.arch }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    runs-on: ubuntu-latest
    needs: build
    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          name: digests
          path: /tmp/digests
          merge-multiple: true
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ${{ github.repository }}
            ghcr.io/${{ github.repository }}
          tags: |
            type=ref,event=tag
            type=edge
      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ github.repository }}@sha256:%s ' *)
      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ github.repository }}:${{ steps.meta.outputs.version }}