sync-transmission.yml

name: Sync Transmission Lines

on:
  schedule:
    - cron: '0 6 1 * *' # 1st of each month at 6am UTC (HIFLD updates irregularly)
  workflow_dispatch: {} # Manual trigger

jobs:
  sync:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: npm
      - run: npm ci
      - name: Sync transmission lines from HIFLD
        run: npx tsx scripts/sync-transmission-lines.ts
      - name: Install tippecanoe
        run: |
          sudo apt-get update -qq
          sudo apt-get install -y -qq libsqlite3-dev zlib1g-dev
          git clone --depth 1 https://github.com/felt/tippecanoe.git /tmp/tippecanoe
          cd /tmp/tippecanoe && make -j$(nproc) && sudo make install
      - name: Rebuild tiles
        run: bash scripts/build-tiles.sh
      - name: Commit & push if changed
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add data/transmission-lines.json public/tiles/transmission-lines.pmtiles
          git diff --staged --quiet || (git commit -m "data: update transmission lines (HIFLD)" && git push)