builder.yaml

---
name: "build-docker-image"

on:
  pull_request:

  push:
    tags:
      - "v*"

jobs:
  build:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        platform: [ linux/amd64, linux/arm64 ]

    steps:
      - name: "Checkout the repository"
        uses: actions/checkout@v4

      - name: "Extract metadata for the Docker image"
        if: github.event_name == 'push' && github.ref_type == 'tag' # Only extract metadata if we push a tag
        id: metadata_extraction
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}

      - name: "Login to GitHub Container Registry"
        if: github.event_name == 'push' && github.ref_type == 'tag' # Only login if we push a tag
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: "Set up Docker Buildx"
        uses: docker/setup-buildx-action@v3

      - name: "Build and eventually push container image"
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./Dockerfile
          platforms: ${{ matrix.platform }}
          tags: ${{ steps.metadata_extraction.outputs.tags }}
          labels: ${{ steps.metadata_extraction.outputs.labels }}
          push: ${{ github.event_name == 'push' && github.ref_type == 'tag' }} # Only push built image if we push a tag