build.yaml

name: Container Images
on:
  push:
    branches:
      - main
  pull_request:
  release:
    types: [published]

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

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      attestations: write
      id-token: write

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-tags: 'true'

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

      - name: Set up Docker Buildkit
        run: echo "DOCKER_BUILDKIT=1" >> $GITHUB_ENV

      - name: Cache Docker Layers
        uses: actions/cache@v4
        with:
          path: /tmp/docker-cache
          key: ${{ runner.os }}-docker-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-docker-

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

      - name: Build and push slim
        uses: docker/build-push-action@v4
        with:
          context: .
          file: ./Dockerfile.slim
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}-slim
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=local,src=/tmp/docker-cache
          cache-to: type=local,dest=/tmp/docker-cache

      - name: Build and push
        uses: docker/build-push-action@v4
        with:
          context: .
          file: ./Dockerfile
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=local,src=/tmp/docker-cache
          cache-to: type=local,dest=/tmp/docker-cache
          build-args: |
            SLIM_IMAGE=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.tags }}-slim