name: Scheduled Security Scan

# Visibility-only re-scan of the published image and a fresh build of main.
# Surfaces CVEs disclosed between releases by uploading SARIF to GitHub Code
# Scanning. The PR-blocking gate in ci.yml and the release-blocking gate in
# docker-publish.yml are unchanged; this workflow only writes findings.
on:
  schedule:
    - cron: '0 0 * * *'   # Daily 00:00 UTC
  workflow_dispatch:

# Prevent overlap when a manual workflow_dispatch fires while the daily cron
# run is still in flight. cancel-in-progress is safe here: the workflow only
# uploads SARIF for visibility and has no side effects on the registry.
concurrency:
  group: security-scan
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  scan-published:
    name: Trivy SARIF (published :latest)
    runs-on: ubuntu-latest
    timeout-minutes: 15
    permissions:
      contents: read
      security-events: write
    steps:
      - name: Checkout (trivy.yaml + VEX)
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

      # Same SHA-pinned action used by the PR-blocking and release-blocking
      # scans. The trivy binary version is whatever this action SHA bundles;
      # Dependabot's all-actions group moves it forward when the action is
      # bumped, keeping a single source of truth.
      - name: Trivy scan of saelix/sencho:latest
        uses: aquasecurity/trivy-action@ed142fd0673e97e23eac54620cfb913e5ce36c25 # v0.36.0
        with:
          image-ref: saelix/sencho:latest
          format: sarif
          output: trivy-published.sarif
          severity: 'CRITICAL,HIGH,MEDIUM'
          trivy-config: trivy.yaml
          ignore-unfixed: false

      # if: always() so findings still upload when trivy itself failed mid-run
      # (e.g. CVE DB pull timeout). The categorical separation from the
      # scan-main job below keeps the two result sets distinct in the UI.
      - name: Upload SARIF to code scanning
        if: always()
        uses: github/codeql-action/upload-sarif@e4fba868fa4b1b91e1fdab776edc8cfbe6e9fb81 # v4.37.3
        with:
          sarif_file: trivy-published.sarif
          category: trivy-published-image

  scan-main:
    name: Trivy SARIF (main HEAD build)
    runs-on: ubuntu-latest
    timeout-minutes: 25
    permissions:
      contents: read
      security-events: write
    steps:
      - name: Checkout
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4

      # Mirrors the daily-cache-bust logic from ci.yml / docker-publish.yml so
      # the apk upgrade layer rebuilds at least once per calendar day.
      - name: Compute daily apk cache bust value
        id: apk-bust
        run: echo "date=$(date -u +%Y-%m-%d)" >> "$GITHUB_OUTPUT"

      - name: Build image from main HEAD
        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7
        with:
          context: .
          push: false
          load: true
          tags: localhost/sencho:scheduled-scan
          cache-from: type=gha
          build-args: |
            APK_CACHE_BUST=${{ steps.apk-bust.outputs.date }}

      - name: Trivy scan of fresh main build
        uses: aquasecurity/trivy-action@ed142fd0673e97e23eac54620cfb913e5ce36c25 # v0.36.0
        with:
          image-ref: localhost/sencho:scheduled-scan
          format: sarif
          output: trivy-main.sarif
          severity: 'CRITICAL,HIGH,MEDIUM'
          trivy-config: trivy.yaml
          ignore-unfixed: false

      - name: Upload SARIF to code scanning
        if: always()
        uses: github/codeql-action/upload-sarif@e4fba868fa4b1b91e1fdab776edc8cfbe6e9fb81 # v4.37.3
        with:
          sarif_file: trivy-main.sarif
          category: trivy-main-head