Check if your package was installed globally
Can be useful if your CLI needs different behavior when installed globally and locally.
$ npm install is-installed-globally
const isInstalledGlobally = require('is-installed-globally');
// With `npm install your-package`
console.log(isInstalledGlobally);
//=> false
// With `npm install --global your-package`
console.log(isInstalledGlobally);
//=> true