markdown-lint.yml

name: Markdown Lint
on: 
  push:
    branches:
      - "main" # run when push happens on all branches

jobs:
  lint:
    runs-on: ubuntu-latest
    
    steps:
    - name: Check out repo
      uses: actions/checkout@v3
    - name: Get file changes
      id: get_file_changes
      uses: trilom/file-changes-action@v1.2.4
      with:
        output: ' '
    - name: Echo changed files
      run: |
        echo Changed files: ${{ steps.get_file_changes.outputs.files }}
    - name: Get only md files
      id: get_md_changes
      run: |
        echo -e "::set-output name=files::\c";echo "${{ steps.get_file_changes.outputs.files }}" | for i in $(cat) ; do if [[ $i == *.md ]]; then echo -e "$i \c"; fi  ;done
    - name: markdownlint-cli
      if: ${{ steps.get_md_changes.outputs.files}}
      uses: nosborn/github-action-markdown-cli@v3.2.0
      with:
        files: ${{ steps.get_md_changes.outputs.files}}
        config_file: ".markdownlint"