main.yml

name: Build and Publish

on:
  push:
    branches: [main]

jobs:
  build:
    runs-on: ubuntu-latest
    outputs:
      should_publish: ${{ steps.version_check.outputs.should_publish }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '24'
          registry-url: 'https://registry.npmjs.org'

      - name: Enable Corepack
        run: corepack enable

      - name: Install dependencies
        run: yarn install --immutable

      - name: Typecheck
        run: yarn typecheck

      - name: Lint
        run: yarn lint

      - name: Build
        run: yarn prepare

      - name: Check version
        id: version_check
        run: |
          PACKAGE_NAME=$(node -p "require('./package.json').name")
          LOCAL_VERSION=$(node -p "require('./package.json').version")
          NPM_VERSION=$(npm view "$PACKAGE_NAME" version 2>/dev/null || echo "0.0.0")

          echo "Local version: $LOCAL_VERSION"
          echo "npm version: $NPM_VERSION"

          if [ "$LOCAL_VERSION" != "$NPM_VERSION" ]; then
            echo "Version changed, will publish"
            echo "should_publish=true" >> $GITHUB_OUTPUT
          else
            echo "Version unchanged, skipping publish"
            echo "should_publish=false" >> $GITHUB_OUTPUT
          fi

  publish:
    needs: build
    if: github.event_name == 'push' && github.ref == 'refs/heads/main' && needs.build.outputs.should_publish == 'true'
    runs-on: ubuntu-latest
    permissions:
      contents: read
      id-token: write
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 20
          registry-url: 'https://registry.npmjs.org'

      - name: Enable Corepack
        run: corepack enable

      - name: Install dependencies
        run: yarn install --immutable

      - name: Build
        run: yarn prepare

      - name: Publish to npm
        run: npm publish --access public --provenance