ensure-node-env

A script that helps ensure you have the correct node & npm versions installed globally in your environment.

Usage

Add the following to your package.json:

  ...
  "engines": {
    "node": "^8.9.0",
    "npm": "^5.5.1"
  },
  "scripts": {
    "preinstall": "node -e \"$(curl -fsSL https://raw.githubusercontent.com/Skyscanner/ensure-node-env/master/dist/index.js)\"",
    ...

Where the node and npm engine properties specify a valid semver range for Node and npm version respectively.

Alternative install via npm

First, install the package globally:

npm install -g ensure-node-env

Then add the following to your package.json:

  ...
  "engines": {
    "node": "^8.9.0",
    "npm": "^5.5.1"
  },
  "scripts": {
    "preinstall": "ensure-node-env",
    ...

Usage in libraries

This script is designed to be used as a development-only preinstall check in the project root. For libraries that are published and consumed in other projects it is considered good enough to include it as a pretest check:

npm install ensure-node-env --save-dev

  ...
  "engines": {
    "node": "^8.9.0",
    "npm": "^5.5.1"
  },
  "scripts": {
    "pretest": "ensure-node-env",
    ...

Guide

Skyscanner Node development requires Node LTS and npm ^5.5.1. Nvm users can run nvm use to switch to lts/carbon. Nave users can use nave auto. You can also download Node LTS using the website. To install npm ^5.5.1, run npm install -g npm@^5.5.1.