docker.yml

name: Docker Container Build Workflow

#https://github.community/t/github-package-registry-does-not-support-multi-cpu-architecture-image/14339/11

on:
  schedule:
    - cron: '0 8 13 * *' # once a month
  push:
    branches: 
      - main
    tags:
      - 'v*.*.*'
  pull_request:
    branches: 
      - main
  workflow_dispatch:

env:
  IMAGE_NAME: nicochcgi
  REPO_NAME: nicochcgi

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      -
        name: Checkout
        uses: actions/checkout@v2

      - name: Prepare
        id: prep
        run: |
          DOCKER_IMAGE=ghcr.io/${{ github.repository_owner }}/${REPO_NAME}/${IMAGE_NAME}
          VERSION=edge
          if [[ $GITHUB_REF == refs/tags/* ]]; then
            VERSION=${GITHUB_REF#refs/tags/v}
          fi
          if [ "${{ github.event_name }}" = "schedule" ]; then
            VERSION=monthly
          elif [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            VERSION=test
          fi
          TAGS="${DOCKER_IMAGE}:${VERSION}"
          if [[ $VERSION =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
            TAGS="$TAGS,${DOCKER_IMAGE}:latest"
          fi
          echo ::set-output name=tags::${TAGS},${DOCKER_IMAGE}:cache
          echo "::set-output name=latest::${DOCKER_IMAGE}:latest"
          echo "::set-output name=tag_cache::${DOCKER_IMAGE}:cache"

          # lowercase the branch name
          BRANCH=$(echo ${GITHUB_REF##*/} | tr '[A-Z]' '[a-z]')
          LABELS="org.opencontainers.image.revision=$GITHUB_SHA"
          LABELS="$LABELS,org.opencontainers.image.created=$(date -u +'%Y-%m-%dT%H:%M:%SZ')"
          LABELS="$LABELS,org.opencontainers.image.version=$VERSION"
          LABELS="$LABELS,com.github.repo.branch=$BRANCH"
          LABELS="$LABELS,com.github.repo.dockerfile=Dockerfile"
          echo ::set-output name=labels::${LABELS}

          BUILD_ARGS="BRANCH=$BRANCH"
          echo ::set-output name=args::${BUILD_ARGS}

      - name: Tag names
        run: echo ${{ steps.prep.outputs.tags }}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@master
        with:
          platforms: all

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@master

      - name: Builder instance name
        run: echo ${{ steps.buildx.outputs.name }}

      - name: Available platforms
        run: echo ${{ steps.buildx.outputs.platforms }}

      - name: Login to GHCR
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v1 
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GHCR_PAT }}

      - name: Build cache and push
        id: docker_build_cache
        uses: docker/build-push-action@v2
        with:
          builder: ${{ steps.buildx.outputs.name }}
          context: .
          file: ./Dockerfile
          platforms: linux/amd64,linux/arm64,linux/arm/v7
          push: true
          tags: ${{ steps.prep.outputs.tag_cache }}
          build-args: ${{ steps.prep.outputs.args }}
          labels: ${{ steps.prep.outputs.labels }}
          cache-from: |-
            type=registry,ref=${{ steps.prep.outputs.tag_cache }}
            type=registry,ref=${{ steps.prep.outputs.latest }}
          cache-to: type=inline

      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          builder: ${{ steps.buildx.outputs.name }}
          context: .
          file: ./Dockerfile
          platforms: linux/amd64,linux/arm64,linux/ppc64le,linux/s390x,linux/arm/v7
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.prep.outputs.tags }}
          build-args: ${{ steps.prep.outputs.args }}
          labels: ${{ steps.prep.outputs.labels }}
          cache-from: |-
            type=registry,ref=${{ steps.prep.outputs.tag_cache }}
            type=registry,ref=${{ steps.prep.outputs.latest }}
          cache-to: type=inline