---
name: Star History

on:
  schedule:
    - cron: "0 0 * * *"  # daily, 00:00 UTC
  workflow_dispatch:

permissions:
  contents: write

jobs:
  render:
    name: Regenerate star history chart
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v7

      - name: Set up Python
        uses: actions/setup-python@v8
        with:
          python-version: "3.x"
          cache: pip
          cache-dependency-path: .github/scripts/star_history.py

      - name: Install matplotlib
        run: pip install matplotlib

      - name: Render chart
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: python .github/scripts/star_history.py

      - name: Commit if changed
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          if git diff --quiet -- note/star_history.svg; then
            echo "No changes to the chart."
            exit 0
          fi
          git add note/star_history.svg
          git commit -m "docs: regenerate star history chart"
          git push