assign_issue_to_pr.yml

name: assign_issue_number_to_pr_body

on:
  pull_request:
    types: [ opened ]
    branches-ignore:
      - main

jobs:
  append_issue_number_to_pr_body:
    runs-on: ubuntu-latest
    steps:
      - name: append feature number to pr body pr branch = feat/(issueNumber)
        uses: actions/github-script@v4
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const pr = await github.pulls.get({
                owner: context.repo.owner,
                repo: context.repo.repo,
                pull_number: context.issue.number
            });
            const body = pr.data.body;
            const issueNumber= pr.data.head.ref.split('/')[1];
            const newBody = body + "\n\n" + "close #" + issueNumber;
            await github.pulls.update({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  pull_number: context.issue.number,
                  body: newBody
              });