update-trivy-db.yaml

# Note: This workflow only updates the cache. You should create a separate workflow for your actual Trivy scans.
# In your scan workflow, set TRIVY_SKIP_DB_UPDATE=true and TRIVY_SKIP_JAVA_DB_UPDATE=true.
name: Update Trivy Cache

on:
  schedule:
    - cron: '0 0 * * *'  # Run daily at midnight UTC
  workflow_dispatch:  # Allow manual triggering

jobs:
  update-trivy-db:
    runs-on: ubuntu-latest
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
        with:
          egress-policy: audit

      - name: Setup oras
        uses: oras-project/setup-oras@9c92598691bfef1424de2f8fae81941568f5889c # v1.2.1

      - name: Get current date
        id: date
        run: echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT

      - name: Download and extract the vulnerability DB
        run: |
          mkdir -p $GITHUB_WORKSPACE/.cache/trivy/db
          oras pull ghcr.io/aquasecurity/trivy-db:2
          tar -xzf db.tar.gz -C $GITHUB_WORKSPACE/.cache/trivy/db
          rm db.tar.gz

      - name: Cache DBs
        uses: actions/cache/save@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4.1.2
        with:
          path: ${{ github.workspace }}/.cache/trivy
          key: cache-trivy-${{ steps.date.outputs.date }}