name: Docker Build & Push

on:
  push:
    branches: [main]
    tags: ['v*']
  pull_request:
    branches: [main]

jobs:
  docker:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
    - uses: actions/checkout@v4

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v2

    - name: Log in to GitHub Container Registry
      if: github.event_name != 'pull_request'
      uses: docker/login-action@v2
      with:
        registry: ghcr.io
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - name: Extract metadata
      id: meta
      uses: docker/metadata-action@v4
      with:
        images: |
          ghcr.io/${{ github.repository }}
        tags: |
          type=ref,event=branch
          type=semver,pattern={{version}}
          type=semver,pattern={{major}}.{{minor}}
          type=sha
          type=raw,value=latest,enable={{is_default_branch}}

    - name: Build and push
      uses: docker/build-push-action@v4
      with:
        context: .
        push: ${{ github.event_name != 'pull_request' }}
        tags: ${{ steps.meta.outputs.tags }}
        labels: ${{ steps.meta.outputs.labels }}
        cache-from: type=gha
        cache-to: type=gha,mode=max
