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@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@6c175e9c4083a92bbca2f9724c8a5e33bc2d97a5  # master
        with:
          image-ref: 'docker.io/coredns/coredns:${{ matrix.versions }}'
          severity: 'CRITICAL,HIGH'
          format: 'sarif'
          output: 'trivy-results.sarif'

      - name: Upload Trivy scan results to GitHub Security tab
        uses: github/codeql-action/upload-sarif@fc7e4a0fa01c3cca5fd6a1fddec5c0740c977aa2  # v3.28.14
        with:
          sarif_file: 'trivy-results.sarif'