name: Check for Generated Files

on:
  # Triggers the workflow on push or pull request events but only for the dev branch
  pull_request:
    branches: [dev]

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

jobs:
  checkFiles:
    name: Check Files
    runs-on: ubuntu-latest
    steps:
      - name: Checkout files
        uses: actions/checkout@v2

      - name: Check bundle files
        id: changed-bundle-files
        uses: tj-actions/changed-files@v18.4
        with:
          files: |
            dist/*
            index.html
            main.bundle.js
            main.bundle.js.map

      - name: Check documentation changes
        id: changed-markdown-doc-files
        uses: tj-actions/changed-files@v18.4
        with:
          files: |
            markdown/*.md

      - name: Warn when bundle files were changed
        id: warn-bundles-changed
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          echo "Creating label (if it does not exist)"
          LABEL="validation: bundle files modified"
          gh --repo "${{ github.repository }}" \
            label create "$LABEL" --description "Modifications to this pull request are suggested" --color D93F0B || true

          if [ "${{ steps.changed-bundle-files.outputs.any_changed }}" == "false" ]; then
            echo "No forbidden files included, removing warning"
            gh --repo "${{ github.repository }}" \
              pr edit "${{ github.event.number }}" --remove-label "$LABEL" || true
          else
            echo "Forbidden files included, generating warning"

            touch comment.txt
            echo "## Generated build or documentation files were included. PRs should not normally contain any generated files." >> comment.txt
            echo "" >> comment.txt
            echo "Review the changes and ensure that including built files was necessary." >> comment.txt

            echo "Add pr label"
            gh --repo "${{ github.repository }}" \
              pr edit "${{ github.event.number }}" --add-label "$LABEL"
            echo "And comment on the pr"
            gh --repo "${{ github.repository }}" \
              pr comment "${{ github.event.number }}" --body-file comment.txt
          fi