Github Actions setup - Private NPM Package

ghactions-npm-private-setup.md

Installing a private NPM package in a Github Action

Firstly, this is based on the short post here.

The problem?

You need to create an .npmrc file on the fly via your github actions .yml script.

The solution

Separate steps and echo your environment variable from NPM, set in Github (at Musicfox NPM_AUTH_TOKEN), and pre-write a fresh .npmrc.

⚠️ Steps are not in order! ⚠️

See this sample:

---
name: "Chromatic"

on: [push]

jobs:
  build-test-publish-components:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout source
        uses: actions/checkout@v2
        with: 
          fetch-depth: 0  # required for git history retrieval
          scope: '@musicfox'
      - name: Setup NPMrc
        run: echo "//registry.npmjs.org/:_authToken=${{secrets.NPM_AUTH_TOKEN}}" > .npmrc

      - name: Install source 
        run: |
          npm install
      - name: Build source
        run: |
          npm build
      - name: Run and publish chromatic tests
        uses: chromaui/action@v1
        with:
          projectToken: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}
          token: ${{ secrets.GITHUB_TOKEN }}
...