close-issues-on-pr-merge.yml

# .github/workflows/close-issues-on-pr-merge.yml
name: Close Issues on PR Merge

on:
  pull_request:
    types: [closed]

jobs:
  close-issues:
    if: github.event.pull_request.merged == true
    runs-on: ubuntu-latest
    steps:
      - name: Close associated issues
        uses: actions/github-script@v5
        with:
          script: |
            const issueNumbers = context.payload.pull_request.body.match(/#(\\d+)/g);
            if (issueNumbers) {
              for (const issue of issueNumbers) {
                await github.issues.update({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: parseInt(issue.replace('#', '')),
                  state: 'closed',
                });
              }
            }
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}