Enforce .npmrc on npm install

enforceNodeVersion.js

/*
Isn't it nice when devs use the same version of node when building on a project

I was searching for a way to enforce .nvmrc before running npm install

There was an npm package 
-node-version, but do we really want another dependency in our projects

Add the following line inside of package.json
"preinstall": "node ./enforceNodeVersion"
*/

// access node file system
import fs from 'fs';

/**
 * Checks the version of node in .nvmrc against node's process.version
 * Exits if the versions do not match
 *
 * @returns {undefined} - undefined
 */
const enforceNodeVersion = () => {
  const nvmrc = fs.readFileSync('.nvmrc', 'utf8');
  if (nvmrc.trim() !== process.version) {
    console.log(
      `Expected Node Version ${nvmrc} but instead found ${process.version} \n Try typing "nvm use" to switch node versions \n`
    );
    process.exit();
  }
};

enforceNodeVersion();

package.json

{
  "name": "myApp",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "preinstall": "node ./enforceNodeVersion"
  },
  "keywords": [],
  "author": "",
  "license": "ISC"
}