update-plugins-doc-pr-closed.yaml

name: Update the plugins documentation on PR merge
# This flow rebuild the plugins README.md file when a PR is merged
# and if some files changed are README.md

on:
  pull_request_target:
    branches: ['main']
    types: ['closed']

permissions:
  contents: write
  pull-requests: write
  
jobs:
  generateDocs:
    if: github.event.pull_request.merged == true
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@v44
        with:
          files: plugins/**/**.md

      - name: List all changed files
        env:
          ALL_CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
        run: |
          for file in ${ALL_CHANGED_FILES}; do
            echo "$file was changed"
          done

      - name: Check if contains README.md
        id: pr_contains_readme
        env:
          ALL_CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
        continue-on-error: true
        run: |
          set +e
          echo ${ALL_CHANGED_FILES} | grep -c README.md
          echo "grep_result=$(echo ${ALL_CHANGED_FILES} | grep -c README.md)" >> $GITHUB_OUTPUT

      - name: Generate main README.md from template
        if: steps.pr_contains_readme.outputs.grep_result > 0
        run: |
          echo "Generate a new README.md merging content from plugins README"
          git config user.name "${{ github.actor }}"
          git config user.email "${{ github.actor_id }}+${{ github.actor }}@users.noreply.github.com"
          
          cd plugins
          m4 README.m4.template.md > README.md
          set +e
          git add README.md
          git commit -m "Generated plugins/README.md file from template"
          git push

      - name: Don't generate main README.md
        if: steps.pr_contains_readme.outputs.grep_result == 0
        env:
          ALL_CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
        run: |
          echo "Don't generate README.md"