require-assigned-issue.yml

# Here if the issue is not referenced in PR an alert pops up
name: Require referenced assigned issue

on:
  pull_request:
    types: [opened, edited, reopened, synchronize]

permissions:
  issues: read
  pull-requests: write
  contents: read

jobs:
  check-issue:
    runs-on: ubuntu-latest
    outputs:
      result: ${{ steps.check.outputs.result }}
    steps:
      - name: Check referenced issue and assignee
        id: check
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const pr = context.payload.pull_request;
            const body = pr.body || '';
            const issueRefMatch = body.match(/#(\d+)/);
            if (!issueRefMatch) {
              core.setOutput('result', 'no-issue');
              core.setFailed('PR must reference an issue (e.g., "Closes #12").');
              return;
            }
            const issueNumber = Number(issueRefMatch[1]);
            const { data: issue } = await github.rest.issues.get({ owner: context.repo.owner, repo: context.repo.repo, issue_number: issueNumber });
            if (!issue) { core.setOutput('result','issue-not-found'); core.setFailed(`Referenced issue #${issueNumber} not found.`); return; }
            if (!issue.assignee && (!issue.assignees || issue.assignees.length === 0)) { core.setOutput('result','unassigned'); core.setFailed(`Referenced issue #${issueNumber} is not assigned. Please assign the issue before opening a PR.`); return; }
            core.setOutput('result','ok');