urlchecker-pr-label.yml

on: 
  pull_request: 
    types: [labeled]
    
name: Commands

jobs:  
  urlchecks:
    # check launched when a PR is labelled with the "needs-url-checks" label
    # create that label first :-)
    if: contains(github.event.pull_request.labels.*.name, 'needs-url-checks')
    name: check-urls
    runs-on: ubuntu-latest

    steps:    
    # If you want to use git instead of the API to find changed files
    # Use something like https://github.com/actions/checkout#fetch-all-branches
    - uses: actions/checkout@v2
     
    # As this only gets one page from the API it is limited to 30 files
    # for more, checkout with more depth (see earlier comment)
    # and use e.g. https://stackoverflow.com/a/41140296/5489251
    # The changed files list is formatted for urlchecker
    # and saved as an environment variable so the next step can access it.
    - name: list files
      run: |
          PR=$(jq --raw-output .pull_request.number "${GITHUB_EVENT_PATH}")
          echo "PR=${PR}" >> $GITHUB_ENV
          files=$(curl --request GET \
          --url https://api.github.com/repos/${{ github.repository }}/pulls/$PR/files \
          --header 'authorization: Bearer ${{ secrets.GITHUB_TOKEN }}' \
          --header 'Accept: application/vnd.github.antiope-preview+json' \
          --header 'content-type: application/json' | jq --raw-output .[].filename | sed 's/^\|$/"/g'|paste -sd, - | tr -d \" | tr -d \') 
          echo "files=${files}" >> $GITHUB_ENV
          
    # Run URL checks
    - name: URLs-checker
      uses: urlstechie/urlchecker-action@master
      with:
        save: "urls.csv"
        # only include the changed files
        include_files: ${{ env.files }}
        print_all: true
        
    # In case of failure, upload results as artifacts
    - name: Archive URL checking results
      if: failure()
      uses: actions/upload-artifact@v2-preview
      with:
        name: urlchecker-results
        path: urls.csv

    # Remove the label from the PR after the checks are done
    - name: Delete label
      if: always()
      run: |
          curl --request DELETE \
          --url https://api.github.com/repos/${{ github.repository }}/issues/${{ env.PR }}/labels/needs-url-checks \
          --header 'authorization: Bearer ${{ secrets.GITHUB_TOKEN }}'