update-pull-request-description.yml

name: "Update Pull Request description with Template"

on:
  pull_request:
    types: [opened]
    branches-ignore:
      - "dependabot/**"

permissions:
  contents: read
  pull-requests: write

jobs:
  update-pull-request:
    if: github.actor != 'dependabot[bot]'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Get Branch Name
        uses: mdecoleman/pr-branch-name@v3.0.0
        id: branch_name
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}
      - name: Get branch number
        run: echo "BRANCH_NUMBER=$(echo ${{ steps.branch_name.outputs.branch }} | grep -Eo '[A-Za-z]{2,5}-[0-9]{1,5}')" >> $GITHUB_ENV
      - name: Get branch designator
        run: echo "BRANCH_DESIGNATOR=$(echo ${{ steps.branch_name.outputs.branch }} | sed 's|/.*||')" >> $GITHUB_ENV
      - name: Get template name
        run: echo "TEMPLATE_NAME=$(cat .github/PULL_REQUEST_TEMPLATE/${{ env.BRANCH_DESIGNATOR }}_pull_request_template.md > /dev/null 2>&1 && echo ${{ env.BRANCH_DESIGNATOR }}_pull_request_template.md || echo task_pull_request_template.md)" >> $GITHUB_ENV
      - name: Render Pull Request template
        id: template
        uses: chuhlomin/render-template@v1.10
        with:
          template: .github/PULL_REQUEST_TEMPLATE/${{ env.TEMPLATE_NAME }}
          vars: |
            BRANCH_NUMBER: ${{ env.BRANCH_NUMBER }}
            BRANCH_DESIGNATOR: ${{ env.BRANCH_DESIGNATOR }}
      - uses: tzkhan/pr-update-action@v2
        with:
          repo-token: "${{ secrets.GITHUB_TOKEN }}"
          head-branch-regex: "${{ env.BRANCH_DESIGNATOR }}/.*"
          body-template: ${{ steps.template.outputs.result }}
          body-update-action: "replace"