name: Check links in the README

on: [push, pull_request]

jobs:
  LinkChecker:
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - uses: awalsh128/cache-apt-pkgs-action@latest
        with:
          packages: pandoc

      - name: Convert Markdown to HTML format
        run: pandoc README.md --standalone --output README.html

      - name: Set up Python 3.9
        uses: actions/setup-python@v4
        with:
          python-version: '3.9'

      - run: pip install linkchecker --user

      - name: Link Checker
        run: linkchecker README.html --config .github/linkchecker/linkchecker.conf --file-output html/utf-8/report.html

      - run: cat report.html >> ${GITHUB_STEP_SUMMARY}
        if: success() || failure()