build-feed.yml

name: Build Live Feed

on:
  schedule:
    - cron: "23 */3 * * *"
  push:
    branches: [main]
    paths:
      - "data/lessons.json"
      - "scripts/build_feed.py"
  workflow_dispatch:

permissions:
  contents: write
  issues: read
  pull-requests: read

jobs:
  build-feed:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

      - name: Setup Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Guard against empty lessons.json
        run: |
          SIZE=$(stat --printf="%s" data/lessons.json)
          if [ "$SIZE" -lt 100 ]; then
            echo "::error::data/lessons.json is $SIZE bytes — refusing to sync empty/truncated file"
            exit 1
          fi
          COUNT=$(python3 -c "import json; print(len(json.load(open('data/lessons.json'))))")
          if [ "$COUNT" -lt 10 ]; then
            echo "::error::data/lessons.json has only $COUNT lessons — refusing to sync"
            exit 1
          fi
          echo "Guard passed: $SIZE bytes, $COUNT lessons"

      - name: Sync lessons.json to docs/data/
        run: cp data/lessons.json docs/data/lessons.json

      - name: Build feed
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          python3 scripts/build_feed.py

      - name: Commit and push if changed
        run: |
          git config user.name "misakanet-bot"
          git config user.email "bot@misakanet.org"
          git add docs/data/lessons.json docs/data/feed.json
          if git diff --cached --quiet; then
            echo "No changes"
          else
            git commit -m "chore(data): sync lessons.json + refresh feed"
            git push
          fi