prerelease.yml

name: Publish Pre-release

on:
  pull_request:
    branches: [ main ]
    types: [opened, synchronize, reopened]

jobs:
  build-and-publish:
    runs-on: ubuntu-latest
    if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: '20.x'
          registry-url: 'https://registry.npmjs.org'
      - uses: pnpm/action-setup@v3
        with:
          version: latest
          run_install: true
      - run: pnpm typecheck
      - run: pnpm lint
      - run: pnpm build
      - name: Run tests
        run: pnpm test

      - name: Get PR commit count
        id: pr_commits
        run: |
          count=$(gh pr view ${{ github.event.pull_request.number }} --json commits --jq '.commits | length')
          echo "commit_count=$count" >> "$GITHUB_OUTPUT"
        env:
          GH_TOKEN: ${{ github.token }}

      - name: Update version for pre-release
        run: |
          PACKAGE_VERSION=$(node -p "require('./package.json').version")
          PRERELEASE_VERSION="${PACKAGE_VERSION}-pr${{ github.event.number }}.${{ steps.pr_commits.outputs.commit_count }}"
          npm version $PRERELEASE_VERSION --no-git-tag-version
          echo "Publishing version: $PRERELEASE_VERSION"

      - name: Publish pre-release to npm
        run: pnpm publish --tag pr --no-git-checks --no-otp
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}