close-issues-on-pr-merge-to-release-branch.yml

name: Close issues on PR merge to release branch

on:
  pull_request:
    types:
      - closed

jobs:
  close-related-issues:
    runs-on: ubuntu-latest
    if: github.event.pull_request.merged == true && startsWith(github.ref, 'refs/heads/release/')
    permissions:
      issues: write
    steps:
      - name: Extract issue number
        id: extract_issue_number
        run: |
          issue_number=$(echo "${{ github.event.pull_request.body }}" | grep -oE '#[0-9]+' | head -n 1 | tr -d '#')
          echo "ISSUE_NUMBER=$issue_number" >> $GITHUB_ENV

      - name: Close linked issues
        uses: peter-evans/close-issue@v3
        with:
          issue-number: ${{ env.ISSUE_NUMBER }}
          comment: "This issue is being closed because the related PR has been merged into a release branch."