name: Publish to npm registry

on:
  push:
    branches:
      - main

jobs:
  publish:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - uses: actions/setup-node@v1
        with:
          node-version: 16
      - name: Install and Build 🔧
        run: |
          npm ci
          npm run build
      - name: Publish 🔧
        uses: JS-DevTools/npm-publish@v1
        with:
          token: ${{ secrets.NPM_TOKEN }}
          check-version: true

      - if: steps.publish.outputs.type != 'none'
        run: |
          echo "Version changed: ${{ steps.publish.outputs.old-version }} => ${{ steps.publish.outputs.version }}"
      - if: steps.publish.outputs.type == 'none'
        run: |
          echo "Version is not changed. publishing cancels."