name: pip-audit
on:
  schedule:
    - cron: "30 1 * * *"
  push:
    branches: [main]
    paths: [requirements.txt, scripts/filter_requirements.py]
  workflow_dispatch:

jobs:
  audit:
    runs-on: ubuntu-latest
    outputs:
      report_b64: ${{ steps.audit.outputs.report_b64 }}
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-python@v5
        with:
          python-version: "3.12"

      - name: Audit dependencies
        id: audit
        shell: bash
        run: |
          pip install pip-audit
          python3 scripts/filter_requirements.py requirements.txt requirements.audit.txt

          # Don't let a non-zero exit abort the step, so the report is saved first
          set +e
          pip-audit -r requirements.audit.txt --no-deps --disable-pip > audit.txt 2>&1
          echo $? > audit.exit
          set -e

          cat audit.txt
          echo "report_b64=$(head -c 100000 audit.txt | base64 -w0)" >> "$GITHUB_OUTPUT"

      - name: Fail if the audit failed
        shell: bash
        run: exit "$(cat audit.exit)"

  notify:
    needs: audit
    if: ${{ always() && needs.audit.result == 'failure' }}
    runs-on: host
    steps:
      - name: Send mail via local postfix
        env:
          MAIL_FROM:  ${{ vars.MAIL_FROM }}
          MAIL_TO:    ${{ vars.MAIL_TO }}
          REPO:       ${{ gitea.repository }}
          RUN_URL:    ${{ gitea.server_url }}/${{ gitea.repository }}/actions/runs/${{ gitea.run_number }}
          REPORT_B64: ${{ needs.audit.outputs.report_b64 }}
        run: |
          python3 - <<'EOF'
          import base64, os, smtplib
          from email.message import EmailMessage

          b64 = os.environ.get("REPORT_B64", "")
          report = (
              base64.b64decode(b64).decode("utf-8", errors="replace")
              if b64 else
              "(no audit output, the job failed before pip-audit finished)"
          )

          msg = EmailMessage()
          msg["Subject"] = f"[pip-audit] Problem in {os.environ['REPO']}"
          msg["From"] = os.environ["MAIL_FROM"]
          msg["To"] = os.environ["MAIL_TO"]
          msg.set_content(
              f"pip-audit result for {os.environ['REPO']}:\n\n"
              f"{report}\n\n"
              f"Run: {os.environ['RUN_URL']}\n"
          )

          with smtplib.SMTP("127.0.0.1", 25, timeout=30) as s:
              s.send_message(msg)
          EOF