name: update
# Pull a fresh Time engine from the central repo and open a PR with the diff (weekly, or run it by hand).
# Upstream: TIME_UPSTREAM (default teahubxyz/time) at TIME_CHANNEL (default main; pin a tag like v1 for stability).
# Workflow files can't be changed by Actions' own token, so if those differ the PR lists them for a human to copy.
on:
  schedule:
    - cron: "17 9 * * 1"
  workflow_dispatch:
permissions:
  contents: write
  pull-requests: write
jobs:
  update:
    if: github.repository != (vars.TIME_UPSTREAM || 'teahubxyz/time')
    runs-on: ubuntu-latest
    timeout-minutes: 3
    env:
      UPSTREAM: ${{ vars.TIME_UPSTREAM || 'teahubxyz/time' }}
      CHANNEL: ${{ vars.TIME_CHANNEL || 'main' }}
      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    steps:
      - uses: actions/checkout@v5
      - run: git clone -q --depth 1 --branch "$CHANNEL" "https://github.com/$UPSTREAM" /tmp/up
      - name: copy engine, open PR if changed
        run: |
          set -e
          for f in .github/time/time.py .github/time/venture.py .github/time/cloudflare.py .github/time/cloudflare/worker.js .github/time/cloudflare/time.js .github/time/cloudflare/test_worker.mjs .github/time/cloudflare/test_auth.mjs .github/time/test_time.py .github/time/seats.json .github/ISSUE_TEMPLATE/early-access.yml .claude/skills/time/SKILL.md; do
            mkdir -p "$(dirname "$f")"; cp "/tmp/up/$f" "$f"
          done
          python3 .github/time/test_time.py > /dev/null
          wf=$(for f in /tmp/up/.github/workflows/*.yml; do b=.github/workflows/$(basename "$f"); cmp -s "$f" "$b" || echo "- \`$b\`"; done)
          if git diff --quiet && [ -z "$(git status --porcelain .github/time)" ]; then
            echo "Time engine is up to date." | tee -a "$GITHUB_STEP_SUMMARY"
            [ -n "$wf" ] && printf 'Workflow files differ upstream, copy by hand:\n%s\n' "$wf" | tee -a "$GITHUB_STEP_SUMMARY"
            exit 0
          fi
          sha=$(git -C /tmp/up rev-parse --short HEAD)
          branch="time-update-$sha"
          git switch -c "$branch"
          git add .github/time .github/ISSUE_TEMPLATE .claude/skills/time
          git -c user.name=time -c user.email=time@users.noreply.github.com commit -qam "Update Time to $UPSTREAM@$sha"
          git push -q origin "$branch"
          body="Fresh Time engine from \`$UPSTREAM@$CHANNEL\` ($sha). Offline tests pass."
          [ -n "$wf" ] && body="$body

          These workflow files differ upstream. Actions can't edit workflows, so copy them by hand from https://github.com/$UPSTREAM/tree/$CHANNEL/.github/workflows:
          $wf"
          gh pr create --title "Update Time ($sha)" --body "$body" --head "$branch"