name: commitlint
on: [pull_request]
jobs:
  lint-commits:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2.3.1
        with:
          # we actually need "github.event.pull_request.commits + 1" commit
          fetch-depth: 0
      - uses: actions/setup-node@v2.1.0
      # or just "yarn" if you depend on "@commitlint/cli" already
      - run: yarn add @commitlint/cli
      - run: yarn add @commitlint/config-conventional
      - run: echo "module.exports = {extends: ['@commitlint/config-conventional']}" > commitlint.config.js
      - run: yarn run commitlint --from HEAD~${{ github.event.pull_request.commits }} --to HEAD