name: autoupdate

on:
  workflow_dispatch:
  schedule:
    - cron: '42 9 * * *'

permissions:
  pull-requests: write
  contents: write

jobs:
  autoupdate:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
        with:
          ref: source
      - name: Install prerequisites
        run: sudo apt-get update && sudo apt-get install -y --no-install-recommends iucode-tool sqlite3 unzip shfmt python3
      - name: Update microcode versions
        run: ./scripts/update_mcedb.sh
      - name: Update Intel models
        run: ./scripts/update_intel_models.sh
      - name: Update Intel affected processors
        run: |
          git clone https://github.com/intel/Intel-affected-processor-list.git \
            "$RUNNER_TEMP/Intel-affected-processor-list"
          python3 scripts/intel-affected-processor-list/build_inteldb.py \
            "$RUNNER_TEMP/Intel-affected-processor-list" src/db/100_inteldb.sh \
            --base-db scripts/intel-affected-processor-list/historical_records.db
      - name: Check git diff
        id: diff
        run: |
          if git diff --quiet -- src/db/200_mcedb.sh src/libs/003_intel_models.sh src/db/100_inteldb.sh; then
            echo "changed=false" >> "$GITHUB_OUTPUT"
          else
            echo "changed=true" >> "$GITHUB_OUTPUT"
          fi
          python3 - <<'PY'
          import os
          import re
          import subprocess
          from pathlib import Path

          def previous(path):
              return subprocess.check_output(['git', 'show', f'HEAD:{path}'], text=True)

          def records(text, kind):
              result = {}
              for line in text.splitlines():
                  if kind == 'microcode' and re.match(r'^# [AI],', line):
                      fields = line[2:].split(',')
                      result[tuple(fields[:3])] = tuple(fields[3:])
                  elif kind == 'models':
                      match = re.match(r'\s*readonly (INTEL_\w+)=(.*)', line)
                      if match:
                          result[match[1]] = match[2]
                  elif kind == 'processors' and line.startswith('# 0x'):
                      fields = line[2:].rstrip(',').split(',')
                      qualifier = fields[1] if fields[1].startswith('H=') else ''
                      result[(fields[0], qualifier)] = tuple(fields[2:] if qualifier else fields[1:])
              return result

          outputs = {}
          for kind, path in (
              ('microcode', 'src/db/200_mcedb.sh'),
              ('models', 'src/libs/003_intel_models.sh'),
              ('processors', 'src/db/100_inteldb.sh'),
          ):
              old_text = previous(path)
              new_text = Path(path).read_text(encoding='utf-8')
              old = records(old_text, kind)
              new = records(new_text, kind)
              added = len(new.keys() - old.keys())
              removed = len(old.keys() - new.keys())
              updated = sum(old[key] != new[key] for key in old.keys() & new.keys())
              outputs[kind] = f'{added} added, {updated} updated, {removed} removed ({len(new)} total)'
              if kind == 'microcode':
                  def version(text):
                      match = re.search(r'^# %%% MCEDB (\S+)', text, re.MULTILINE)
                      if not match:
                          raise ValueError('Missing MCEDB version marker')
                      return match[1]
                  before, after = version(old_text), version(new_text)
                  outputs['mcedb'] = f'{before} -> {after}' if before != after else f'{after} (unchanged)'
                  outputs['microcode_changes'] = added + updated + removed
          outputs['intel_revision'] = subprocess.check_output(
              ['git', '-C', os.path.join(os.environ['RUNNER_TEMP'], 'Intel-affected-processor-list'),
               'rev-parse', 'HEAD'], text=True,
          ).strip()
          with open(os.environ['GITHUB_OUTPUT'], 'a', encoding='utf-8') as stream:
              for key, value in outputs.items():
                  print(f'{key}={value}', file=stream)
          PY
          git diff
          cat "$GITHUB_OUTPUT"
      - name: Create Pull Request if needed
        if: steps.diff.outputs.changed == 'true'
        uses: peter-evans/create-pull-request@v7
        with:
          base: source
          branch: autoupdate-fwdb
          add-paths: |
            src/db/200_mcedb.sh
            src/libs/003_intel_models.sh
            src/db/100_inteldb.sh
          commit-message: |
            update: CPU databases, ${{ steps.diff.outputs.microcode_changes }} microcode changes

            MCEDB: ${{ steps.diff.outputs.mcedb }}
            Microcode records: ${{ steps.diff.outputs.microcode }}
            Intel models: ${{ steps.diff.outputs.models }}
            Intel affected-processor profiles: ${{ steps.diff.outputs.processors }}
            Intel CSV revision: ${{ steps.diff.outputs.intel_revision }}
          title: "[Auto] Update CPU databases: MCEDB ${{ steps.diff.outputs.mcedb }}, ${{ steps.diff.outputs.microcode_changes }} microcode changes"
          body: |
            Automated PR to refresh the CPU/microcode databases:

            - **MCEDB version:** ${{ steps.diff.outputs.mcedb }}
            - **Microcode records:** ${{ steps.diff.outputs.microcode }}
            - **Intel CPU models:** ${{ steps.diff.outputs.models }}
            - **Intel affected-processor profiles:** ${{ steps.diff.outputs.processors }}