labeler.yml

name: Label PRs

on:
  pull_request:
    types: [opened, synchronize]

permissions:
  contents: read
  pull-requests: write

jobs:
  area-labels:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/labeler@v5
        with:
          sync-labels: false

  type-label:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/github-script@v7
        with:
          script: |
            const title = context.payload.pull_request.title;
            const prefixMap = {
              'feat': 'type: feature',
              'fix': 'type: fix',
              'refactor': 'type: refactor',
              'chore': 'type: chore',
              'build': 'type: build',
              'test': 'type: test',
              'docs': 'type: docs',
            };

            const match = title.match(/^(\w+)(\(.+\))?[!]?:/);
            if (!match) return;

            const prefix = match[1];
            const label = prefixMap[prefix];
            if (!label) return;

            const { data: labels } = await github.rest.issues.listLabelsOnIssue({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
            });

            if (labels.some(l => l.name === label)) return;

            await github.rest.issues.addLabels({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              labels: [label],
            });