image-build.yaml

name: Create and publish a Docker image

on:
  push:
    branches: ["main"]

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

jobs:
  build-push:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
      - name: extract commit sha
        id: commitsha
        run: echo "SHA_8=${GITHUB_SHA::8}" >> ${GITHUB_ENV}
      - name: Generate build ID
        id: prep
        run: |
          branch=${GITHUB_REF##*/}
          sha=${GITHUB_SHA::8}
          ts=$(date +%s)
          echo "BUILD_ID=${branch}-${sha}-${ts}" >> ${GITHUB_ENV}

      - name: set lower case owner name
        run: echo "IMAGE_NAME_LC=${IMAGE_NAME,,}" >> ${GITHUB_ENV}
      # These are prerequisites for the docker build step
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2
      - name: Log in to the Container registry
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and publish container image with tag
        uses: docker/build-push-action@v3
        with:
          push: true
          context: .
          file: ./Dockerfile
          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME_LC }}:${{ env.BUILD_ID }}
          #          platforms: linux/amd64,linux/arm64
          platforms: linux/amd64
          build-args: |
            VERSION=${{ env.SHA_8 }}