build.yaml

name: Build and publish a Docker image
on:
  push:
    branches:
      - "main"
    tags: [ '*' ]
      # - 'v[0-9]+.[0-9]+.[0-9]+'
  pull_request:
    branches: [ main ]

jobs:
  build:
    name: Build & push docker image
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - dockerfile: ./example-1-sidecars/Dockerfile
            image: ghcr.io/Liquid-Reply/k8s-spin/spin-static-server
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Debug
        run: |
          echo "github.ref -> {{ github.ref }}"
 
      - # Login into registry
        name: Login to GitHub Container Registry
        # if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - # Extract Docker metadata
        name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ matrix.image }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}

      - # Build and push to GHCR Registry
        name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          # context: .
          push: ${{ github.event_name != 'pull_request' }}
          file: ${{ matrix.dockerfile }}
          labels: ${{ steps.meta.outputs.labels }}
          tags: ${{ steps.meta.outputs.tags }}
            # ghcr.io/${{ env.IMAGE_NAME }}:latest
            # ghcr.io/${{ env.IMAGE_NAME }}:${{ github.sha }}
            # ${{ steps.meta.outputs.tags }}