Require or Install NPM package on demand

require-or-install.js

/**
 * This function will check to see if a module is installed and if not will run `npm install` to install all dependencies.
 * Then, the module will be required and returned.
 * The intended usage is for a consumer to be able to require a module even if npm install has not been run beforehand.
 * Source: https://stackoverflow.com/a/53377794/626911
 *
 * Example usage:
 *   const requireOrInstall = require("./helpers/require-or-install");
 *   axios = await requireOrInstall("axios");
 *
 * @param {*} module
 * @returns
 */
module.exports = async (module) => {
    try {
        require.resolve(module);
    } catch (e) {
        console.log(
            `Could not resolve "${module}".  Dependencies will be installed and then another attempt to resolve will be made...`
        );
        exec("npm install");

        // Wait until the next event cycle otherwise Node will not find the module when requiring it
        await new Promise((resolve) => setImmediate(() => resolve()));
    }

    return require(module);
};