AWS Lambda example to fetch an NPM package inline, works only if the package has no dependencies

aws-lambda-fetch-npm.js

'use strict';

const asyncProgressPromise = fetchNPM('progress-promise', '0.0.5');

exports.handler = (event, context, callback) => {
    asyncProgressPromise
    .then(ProgressPromise => {
        console.log(ProgressPromise);
        callback();
    })
    .catch(callback)
};

function fetchNPM(packageName, version) {
    return new Promise((resolve, reject) => {
        require('child_process').exec(
            `mkdir -p /tmp/${packageName} && ` +
            `curl https://registry.npmjs.org/${packageName}/-/${packageName}-${version}.tgz | ` +
            `tar -C /tmp/${packageName} -zxvf -`,
            error => {
                if(error) reject(error);
                else resolve(require(`/tmp/${packageName}/package`));
            });
    });
}