auto-label.yml

name: 'Auto Label PR by Commit Type'

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

permissions:
  issues: write
  pull-requests: write

jobs:
  auto-label:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const prNumber = context.payload.pull_request.number;
            const { data: commits } = await github.rest.pulls.listCommits({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: prNumber,
            });

            const labelMap = {
              'feat': '✨feature',
              'fix': '🐞bugfix',
              'refactor': '🔄refactor',
              'style': '🎨style',
              'docs': '📚docs',
              'test': '✅test',
              'chore': '⚙️chore',
              'deploy': '⬆️deploy',
            };

            const labels = new Set();

            for (const commit of commits) {
              const message = commit.commit.message.toLowerCase();
              const match = message.match(/^(\w+):/);
              if (match) {
                const type = match[1];
                if (labelMap[type]) {
                  labels.add(labelMap[type]);
                }
              }
            }

            if (labels.size > 0) {
              await github.rest.issues.addLabels({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: prNumber,
                labels: Array.from(labels),
              });
            }