name: Trivy Nightly Scan
on:
  schedule:
    - cron: '0 2 * * 5'  #Run at 2AM UTC on every Friday

permissions: read-all
jobs:
  nightly-scan:
    name: Trivy Scan nightly
    strategy:
      fail-fast: false
      matrix:
        # It will test for only the latest version as older version is not maintained
        versions: [latest]
    permissions:
      security-events: write  # for github/codeql-action/upload-sarif to upload SARIF results

    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@cff3e9a7f62c41dd51975266d0ae235709e39c41 # master
        with:
          image-ref: 'docker.io/coredns/coredns:${{ matrix.versions }}'
          severity: 'CRITICAL,HIGH'
          format: 'template'
          template: '@/contrib/sarif.tpl'
          output: 'trivy-results.sarif'

      - name: Upload Trivy scan results to GitHub Security tab
        uses: github/codeql-action/upload-sarif@3ebbd71c74ef574dbc558c82f70e52732c8b44fe # v2.2.1
        with:
          sarif_file: 'trivy-results.sarif'