test.js

//Main JS file
const Eris = require('eris');

Eris.Client.prototype.setupListeners = function() {

    if (!this._listeners) this._listeners = [];

    for (let listener of this._listeners) {
        this.removeListener(listener.eventName, listener.listener);
    }

    this._listeners = [];

    let listenerFuncs = require('./listeners.js');

    for (let listenerFunc of listenerFuncs) {
        this._listeners.push({'eventName': listenerFunc.eventName, 'listener': listenerFunc.listener});
        this.on(listenerFunc.eventName, listenerFunc.listener);
    }
};

const config = require('./src/config.json')
const Sharder = require('eris-sharder').Master;
const sharder = new Sharder(config.token, config.path, config.options);

//File run by sharder
const Base = require('eris-sharder').Base;
class Class extends Base{
    constructor(bot) {
        super(bot);
    }

    launch() {
        require('./bot.js')(this);
    }

}

module.exports = Class;

//bot.js
module.exports = (cluster) => {

    //whatever the fuck you would normally put in launch

    let client = cluster.bot;

    cluster.ipc.register('reloadbs', () => {
        delete require.cache[require.resolve('./reload.js')];
        require('./reload.js')();
        client.setupListeners();
    });

    console.log(`Cluster #${cluster.clusterID} is ready`);

};

//reload.js
module.exports = function() {
    delete require.cache[require.resolve('./bot.js')];
    delete require.cache[require.resolve('./cache.js')];
    delete require.cache[require.resolve('./cluster.js')];
    delete require.cache[require.resolve('./commands.js')];
    delete require.cache[require.resolve('./duel.js')];
    delete require.cache[require.resolve('./functions.js')];
    delete require.cache[require.resolve('./help.js')];
    delete require.cache[require.resolve('./listeners.js')];
    delete require.cache[require.resolve('./main.js')];
    delete require.cache[require.resolve('./messageCollector.js')];
    delete require.cache[require.resolve('./onMessage.js')];
    delete require.cache[require.resolve('./trade.js')];
    delete require.cache[require.resolve('./unhandledRejection.js')];
    delete require.cache[require.resolve('./uncaughtException.js')];
};

// To reload everything, just use client.cluster.ipc.broadcast('reloadbs', {});