name: NPM Publish

on:
  push:
    branches:
      - master

jobs:
  npm-publish:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v1
      - name: Setup node
        uses: actions/setup-node@v1
        with:
          node-version: 10
          registry-url: https://registry.npmjs.org/
      - name: Install dependencies 
        run: npm install
      - name: Publish package
        run: |
          echo "//registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }}" > .npmrc
          LATEST=`npm view . version`
          CURRENT=`cat package.json | jq -r .version`
          if [ "$LATEST" != "$CURRENT" ]
          then
            npm publish
          fi