LFX Export Merge Notify workflow (cncf/mentoring)

name: LFX Export Merge Notify
 
on:
  pull_request:
    types: [closed]
    branches: [main]
 
permissions:
  issues: write
  contents: write  # delete the merged export branch
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  notify:
    timeout-minutes: 30
    # Skip fork PRs: only same-repo export PRs should notify and delete branches.
    if: >-
      github.event.pull_request.merged == true
      && github.event.pull_request.head.repo.full_name == github.repository
      && startsWith(github.event.pull_request.head.ref, 'automation/lfx-export-')
    runs-on: latchkey-small
    steps:
      - name: Checkout
        uses: actions/checkout@v4
 
      - name: Notify exported issues
        uses: actions/github-script@v7
        with:
          script: |
            const path = require('path');
            const _lib = (m) => require(path.join(process.env.GITHUB_WORKSPACE || process.cwd(), 'programs/lfx-mentorship/automation/lib', m));
            const { parseExportedIssueNumbers } = _lib('notify.js');
            const { owner, repo } = context.repo;
            const pr = context.payload.pull_request;
            const prNumber = pr.number;
 
            const issueNums = parseExportedIssueNumbers(pr.body);
 
            if (issueNums.length === 0) {
              console.log('No linked issues found in PR body.');
              return;
            }
 
            for (const issue_number of issueNums) {
              await github.rest.issues.createComment({
                owner, repo, issue_number,
                body: `✅ Export PR #${prNumber} has been merged.\n\n` +
                  `The program files are now on \`main\`. Next step: post to LFX platform.\n\n` +
                  `This issue will be updated when the program is live on LFX.`,
              });
              console.log(`Notified #${issue_number} about merge of PR #${prNumber}`);
            }
 
      - name: Delete merged export branch
        uses: actions/github-script@v7
        with:
          script: |
            const path = require('path');
            const _lib = (m) => require(path.join(process.env.GITHUB_WORKSPACE || process.cwd(), 'programs/lfx-mentorship/automation/lib', m));
            const { isExportBranch } = _lib('notify.js');
            const { owner, repo } = context.repo;
            const branch = context.payload.pull_request.head.ref;
            if (!isExportBranch(branch)) {
              console.log(`Not an export branch, skipping delete: ${branch}`);
              return;
            }
            try {
              await github.rest.git.deleteRef({ owner, repo, ref: `heads/${branch}` });
              console.log(`Deleted merged export branch: ${branch}`);
            } catch (e) {
              console.log(`Could not delete branch ${branch}: ${e.message}`);
            }