create_link_to_template.yaml

name: Create a link to template on master
on:
  pull_request:
    types:
      - closed
    branches:
      - master

jobs:
  Add_template_link:
    if: github.event.pull_request.merged == true 
    runs-on: ubuntu-latest
    steps:

      - name: Create Output folder
        run: | 
            mkdir -p output/

      - name: Get file changes in commit
        id: files
        uses: jitterbit/get-changed-files@v1
        continue-on-error: true

      - name: Check .ipynb file existence
        run: |
          for changed_file in ${{ steps.files.outputs.added_modified }}; do
            
            echo "File: ${changed_file}."
            if [[ "${changed_file}" == *".ipynb"* ]]; then

              echo ".ipynb file found"
              echo "The template is now available on the master branch on this link: 
              https://github.com/${{ github.event.pull_request.head.repo.full_name }}/blob/master/${changed_file}
              " > output/comment.md
            else
              echo "Not an .ipynb file."
            fi
          done
        
      - name: Check comment.md existence
        id: check_files
        uses: andstor/file-existence-action@v1
        with:
          files: "output/comment.md"

      - name: Upload comment.md as artifact
        if: steps.check_files.outputs.files_exists == 'true'
        uses: actions/upload-artifact@v1
        with:
          name: results
          path: output

      - name: Download comment.md as artifact
        if: steps.check_files.outputs.files_exists == 'true'
        uses: actions/download-artifact@v1
        with:
          name: results

      - name: comment PR
        if: steps.check_files.outputs.files_exists == 'true'
        uses: machine-learning-apps/pr-comment@master
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          path: results/comment.md