build-docker-base.yml

name: Docker image build and push

on:
  push:
    paths:
      - docker/**


env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: ghcr.io
  # github.repository as <account>/<repo>
  IMAGE_NAME: ${{ github.repository }}

jobs:
  # define job to build and publish docker image
  build-and-push-docker-image:
    name: Build Docker image and push to repositories
    # run only when code is compiling and tests are passing
    runs-on: ubuntu-latest
  
    # steps to perform in job
    steps:
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2

      # setup Docker buld action
      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v2
        with:
          platforms: linux/amd64, linux/arm64, linux/arm/v7

      - name: Login to Github Packages
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build image and push to Docker Hub and GitHub Container Registry
        uses: docker/build-push-action@v4
        with:
          # relative path to the place where source code with Dockerfile is located
          context: "{{defaultContext}}:docker"
          # Note: tags has to be all lower-case
          tags: |
            ghcr.io/calaos/debian_deb_build_base:latest
            ghcr.io/calaos/debian_deb_build_base:${{ github.sha }}
          push: ${{ github.ref == 'refs/heads/main' }}
          platforms: linux/amd64, linux/arm64, linux/arm/v7

      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}