build.yaml

name: Publish Docker image as release
on:
  push: {}
  pull_request: {}
jobs:
  build:
    name: Push Docker image to gchr.io
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Set App Version
        run: |
          echo "PBS_VERSION=$(cat release-version)" >> $GITHUB_ENV
      - name: Set Tag Image Name
        run: |
          export NEED_IMAGE_PUSH=no
          export BASE_IMAGE_NAME="ghcr.io/${{ github.repository_owner }}/pve-backup-server"
          export IS_LATEST_IMAGE=n
          echo "${GITHUB_REF}" | grep "refs/tags" >/dev/null && export NEED_IMAGE_PUSH=true && export IS_LATEST_IMAGE=y && export TAG_IMAGE_NAME="${BASE_IMAGE_NAME}:release-${GITHUB_REF#refs/*/v}" || true
          echo "NEED_IMAGE_PUSH=${NEED_IMAGE_PUSH}" >> $GITHUB_ENV
          echo "TAG_IMAGE_NAME=${TAG_IMAGE_NAME:-}" >> $GITHUB_ENV
          [ "${IS_LATEST_IMAGE}" = "n" ] || echo "LATEST_IMAGE_NAME=${BASE_IMAGE_NAME}:latest" >> $GITHUB_ENV
      - name: Set Commit Image Name
        if: ${{ env.TAG_IMAGE_NAME == '' && env.GITHUB_REF_NAME == 'publish' }}
        run: |
          echo "TAG_IMAGE_NAME=${BASE_IMAGE_NAME}:commit-${GITHUB_SHA::8}" >> $GITHUB_ENV
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v1
        if: ${{ env.NEED_IMAGE_PUSH == 'true' }}
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.CR_PAT }}
      - name: build and push
        uses: docker/build-push-action@v2
        with:
          context: .
          file: Dockerfile
          build-args: |
            VERSION=${{ env.PBS_VERSION }}
          push: ${{ env.NEED_IMAGE_PUSH == 'true' }}
          tags: |
            ${{ env.LATEST_IMAGE_NAME }}
            ${{ env.TAG_IMAGE_NAME }}