# SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0

name: Workflow Security Reports

on:
  pull_request:
  merge_group:
    types: [checks_requested]
  push:
    branches: [main]
  schedule:
    - cron: "17 6 * * 1"
  workflow_dispatch:
  workflow_call:
    inputs:
      candidate_ref:
        description: Optional pre-release tag to scan instead of the triggering revision
        default: ""
        type: string
      fail-on-findings:
        description: Fail on Zizmor HIGH findings; Actionlint remains informational
        default: false
        type: boolean
    secrets:
      CACHIX_AUTH_TOKEN:
        required: false

permissions:
  contents: read

defaults:
  run:
    shell: nix develop --command bash -euo pipefail {0}

concurrency:
  group: workflow-security-${{ github.workflow }}-${{ inputs.candidate_ref || github.ref }}
  cancel-in-progress: true

jobs:
  actionlint:
    name: Actionlint (informational)
    runs-on: ubuntu-latest
    permissions:
      contents: read
      security-events: write
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        id: checkout
        with:
          ref: ${{ inputs.candidate_ref && format('refs/tags/{0}', inputs.candidate_ref) || '' }}
          persist-credentials: false

      - name: Set up Nix
        uses: ./.github/actions/setup-nix
        with:
          prepare-shell: "true"
          cachix-auth-token: ${{ github.event_name != 'pull_request' && secrets.CACHIX_AUTH_TOKEN || '' }}

      - name: Run Actionlint
        run: |
          set -uo pipefail
          mkdir -p reports
          echo "::add-matcher::.github/actionlint-matcher.json"

          set +e
          actionlint -shellcheck= -pyflakes= 2>&1 | tee reports/actionlint.txt
          status=${PIPESTATUS[0]}

          echo "::remove-matcher owner=actionlint::"
          actionlint \
            -shellcheck= \
            -pyflakes= \
            -format "$(cat .github/actionlint-sarif-template.txt)" \
            > reports/actionlint.sarif
          sarif_status=$?
          set -e

          if [ "$status" -le 1 ] && [ "$sarif_status" -ne "$status" ]; then
            echo "::error::Actionlint could not produce SARIF (exit $sarif_status)."
            exit "$sarif_status"
          fi

          {
            echo "### Actionlint"
            echo
          } >> "$GITHUB_STEP_SUMMARY"

          case "$status" in
            0)
              echo "No findings." >> "$GITHUB_STEP_SUMMARY"
              ;;
            1)
              echo "::warning::Actionlint reported findings; this check is informational."
              echo "Findings were reported as annotations and do not fail CI." >> "$GITHUB_STEP_SUMMARY"
              ;;
            2|3)
              echo "::error::Actionlint could not complete (exit $status)."
              echo "Actionlint failed to run correctly (exit $status)." >> "$GITHUB_STEP_SUMMARY"
              exit "$status"
              ;;
            *)
              echo "::error::Actionlint returned unexpected exit code $status."
              echo "Actionlint returned unexpected exit code $status." >> "$GITHUB_STEP_SUMMARY"
              exit "$status"
              ;;
          esac

      - name: Upload Actionlint SARIF to Code Scanning
        if: success()
        uses: github/codeql-action/upload-sarif@ff2f1c621b7f889edc0d3c761ac2e6a3f8cdb0dd # v4.37.7
        with:
          sarif_file: reports/actionlint.sarif
          ref: ${{ inputs.candidate_ref && format('refs/tags/{0}', inputs.candidate_ref) || '' }}
          sha: ${{ inputs.candidate_ref && steps.checkout.outputs.commit || '' }}
          category: actionlint

      - name: Upload Actionlint report
        if: always()
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: actionlint-${{ github.run_id }}
          path: |
            reports/actionlint.txt
            reports/actionlint.sarif
          if-no-files-found: ignore
          retention-days: 14

  zizmor:
    name: ${{ inputs.fail-on-findings && 'Zizmor High report' || 'Zizmor High report (informational)' }}
    runs-on: ubuntu-latest
    permissions:
      contents: read
      security-events: write
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        id: checkout
        with:
          ref: ${{ inputs.candidate_ref && format('refs/tags/{0}', inputs.candidate_ref) || '' }}
          persist-credentials: false

      - name: Set up Nix
        uses: ./.github/actions/setup-nix
        with:
          prepare-shell: "true"
          cachix-auth-token: ${{ github.event_name != 'pull_request' && secrets.CACHIX_AUTH_TOKEN || '' }}

      - name: Run Zizmor
        id: findings
        env:
          FAIL_ON_FINDINGS: ${{ inputs.fail-on-findings || false }}
        run: |
          set -euo pipefail
          mkdir -p reports

          zizmor \
            --offline \
            --persona=regular \
            --min-severity=high \
            --no-exit-codes \
            --format=json \
            . > reports/zizmor-high.json

          zizmor \
            --offline \
            --persona=regular \
            --min-severity=high \
            --no-exit-codes \
            --format=sarif \
            . > reports/zizmor-high.sarif

          finding_count=$(jq '
            [.[] | select(.ignored != true and .determinations.severity == "High")] | length
          ' reports/zizmor-high.json)
          echo "high_count=$finding_count" >> "$GITHUB_OUTPUT"
          {
            echo "### Zizmor high-severity report"
            echo
            echo "Zizmor has no critical severity; high is its maximum level."
            echo
            echo "Findings: $finding_count"
            if [ "$finding_count" -gt 0 ]; then
              echo
              jq -r \
                'group_by(.ident) | .[] | "- `\(.[0].ident)`: \(length)"' \
                reports/zizmor-high.json
              echo
              echo "Fail on HIGH findings: $FAIL_ON_FINDINGS"
            fi
          } >> "$GITHUB_STEP_SUMMARY"

          if [ "$finding_count" -gt 0 ]; then
            echo "::warning::Zizmor reported $finding_count high-severity findings."
          fi

      - name: Upload Zizmor SARIF to Code Scanning
        if: success()
        uses: github/codeql-action/upload-sarif@ff2f1c621b7f889edc0d3c761ac2e6a3f8cdb0dd # v4.37.7
        with:
          sarif_file: reports/zizmor-high.sarif
          ref: ${{ inputs.candidate_ref && format('refs/tags/{0}', inputs.candidate_ref) || '' }}
          sha: ${{ inputs.candidate_ref && steps.checkout.outputs.commit || '' }}
          category: zizmor-high

      - name: Upload Zizmor reports
        if: always()
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: zizmor-high-${{ github.run_id }}
          path: |
            reports/zizmor-high.json
            reports/zizmor-high.sarif
          if-no-files-found: ignore
          retention-days: 14

      - name: Enforce HIGH/CRITICAL threshold
        if: ${{ !cancelled() && steps.findings.outcome == 'success' }}
        env:
          HIGH_COUNT: ${{ steps.findings.outputs.high_count }}
          FAIL_ON_FINDINGS: ${{ inputs.fail-on-findings || false }}
        run: |
          if [ "$HIGH_COUNT" -gt 0 ]; then
            if [ "$FAIL_ON_FINDINGS" = "true" ]; then
              echo "::error::Zizmor reported $HIGH_COUNT HIGH findings."
              exit 1
            fi
            echo "::warning::Zizmor reported $HIGH_COUNT HIGH findings; enforcement is disabled."
          fi