update-trivy-cache.yml

name: Update Trivy Cache

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

permissions: read-all

jobs:
  update-trivy-db:
    runs-on: ubuntu-latest
    if: ${{ github.ref_name == github.event.repository.default_branch }}
    steps:
      - 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: Prepare DB directory
        run: |
          mkdir -p $GITHUB_WORKSPACE/.cache/trivy/db
      
      - name: Download vulnerability database
        uses: nick-fields/retry@7152eba30c6575329ac0576536151aca5a72780e # v3.0.0
        with:
          max_attempts: 60
          retry_on: error
          timeout_seconds: 30
          retry_wait_seconds: 60
          command: |
            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 }}