docker_pr.yml

name: Docker PR Build

on:
  pull_request:
    branches: [main]
  workflow_dispatch:

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2

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

      # Builds the full Dockerfile, including the SBOM stage that runs
      # `trivy sbom ... --exit-code 1`. The build fails if trivy installation
      # breaks or any UNKNOWN/HIGH/CRITICAL dependency CVE is present.
      # No push: this only validates that the image builds and passes the
      # trivy vulnerability gate.
      - name: Build (incl. trivy SBOM gate)
        uses: docker/build-push-action@v4
        with:
          context: ./
          file: ./Dockerfile
          builder: ${{ steps.buildx.outputs.name }}
          push: false
          load: false
          platforms: linux/amd64
          cache-from: type=registry,ref=ghcr.io/${{ github.repository }}:buildcache