md-link-check.yml

name: Markdown Link Check

on:
  push:
  pull_request:
    branches:
    - master

jobs:
  link-check:
    runs-on: ubuntu-22.04
    env:
      CI: true
    steps:
    - name: Setup Action
      uses: actions/checkout@v3
    - name: Setup Node
      uses: actions/setup-node@v3
      with:
        node-version: 12.x
    - name: Install dependencies
      run: npm install
    - name: Run link check
      run: npm run link-check
    - name: Show broken links
      if: failure()
      run: |
        cat log | awk -v RS="FILE:" 'match($0, /(\S*\.md).*\[✖\].*(\d*\slinks\schecked\.)(.*)/, arr ) { print "FILE:"arr[1] arr[3] > "brokenlinks"}'
        rm -f err log
        cat brokenlinks
        links=`cat brokenlinks`
        links="${links//'%'/'%25'}"
        links="${links//$'\n'/'%0A'}"
        links="${links//$'\r'/'%0D'}"
        echo ::set-output name=links::**Following links are broken:** %0A$links
    - name: Send comment to PR with broken links
      if: failure() && github.event_name == 'pull_request'
      uses: thollander/actions-comment-pull-request@main
      with:
        message: ${{ steps.brokenlinks.outputs.links }}
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}