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@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3  # v6.0.0
      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@b6643a29fecd7f34b3597bc6acb0a98b03d33ff8  # 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@fdbfb4d2750291e159f0156def62b853c2798ca2  # v4.31.5
        with:
          sarif_file: 'trivy-results.sarif'