label.yaml

# This workflow will triage pull requests and apply a label based on the
# paths that are modified in the pull request and its title.
#
# To use this workflow, you will need to set up a .github/labeler.yml
# file with configuration.  For more information, see:
# https://github.com/actions/labeler

name: "Labeler"

on: [pull_request]

jobs:
  label:
    runs-on: ubuntu-22.04
    permissions:
      contents: read
      pull-requests: write

    steps:
      - uses: actions/labeler@ba790c862c380240c6d5e7427be5ace9a05c754b #v4.0.3
        with:
          repo-token: "${{ secrets.GITHUB_TOKEN }}"

      # Note that the following step
      # never removes labels
      - uses: actions/github-script@v6.4.0
        id: set-result
        with:
          script: |
            const config = {
              docs: /^docs/,
              bug: /^bug/,
              fix: /^fix/,
              chore: /^chore/,
              feat: /^feat/,
              build: /^build/,
              ci: /^ci/,
              refactor: /^refactor/,
              "breaking-change": /!:/,
            };

            const labels = Object.entries(config).reduce(
              (acc, cur) => (context.payload.pull_request.title.match(cur[1]) 
                ? [...acc, cur[0]] : acc),
              []
            );

            if (labels.length > 0) {
              await github.rest.issues.addLabels({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.payload.pull_request.number,
                labels: labels
              });
            }
          result-encoding: string