sync-issue-labels.yml

name: Sync Issue Labels to PR

on:
  pull_request_target:
    types: [ opened, synchronize, edited ] # Trigger when a PR is created, updated, or edited

jobs:
  sync-labels:
    runs-on: ubuntu-latest

    steps:
      # Checkout the repository
      - name: Checkout Repository
        uses: actions/checkout@v4

      - name: Sync Labels from Linked Issue
        uses: actions/github-script@v7
        with:
          github-token: '${{ secrets.BOT_TOKEN_1 }}'
          script: |
            // Extract linked issue numbers from the PR description
            const { owner, repo } = context.repo;
            const issueNumbers = context.payload.pull_request.body
              ?.match(/(?:close[sd]?|fix(?:e[sd])?|resolve[sd]?)?(?:\s*)?#(\d+)/gi)
              ?.map(match => parseInt(match.match(/\d+/)[0])) || [];
            console.log(`========owner '${owner}' repo '${repo}'.`);
            if (issueNumbers.length === 0) {
              console.log("No linked issues found in the PR description.");
              return;
            }
            
            for (const issueNumber of issueNumbers) {
              console.log(`Processing linked issue: #${issueNumber}`);
            
              // Fetch labels from the linked issue
              const issueResponse = await github.rest.issues.get({
                owner,
                repo,
                issue_number: issueNumber,
              });
            
              const issueLabels = issueResponse.data.labels.map(label => label.name);
            
              if (issueLabels.length === 0) {
                console.log(`No labels found on Issue #${issueNumber}`);
                continue;
              }
            
              console.log(`Labels from Issue #${issueNumber}: ${issueLabels.join(', ')}`);
            
              // Add labels to the PR
              await github.rest.issues.addLabels({
                owner,
                repo,
                issue_number: context.payload.pull_request.number,
                labels: issueLabels,
              });
            
              console.log(`Labels synced to PR: ${issueLabels.join(', ')}`);
            }