ASCII Doom Test Bot https://discord.gg/dUJBrGk

asciidoombot.js

const DiscordJS = require('discord.js');

const bot = new DiscordJS.Client();

const token = 'PUT_YOUR_TOKEN_HERE';

const cp = require('child_process');

const ID_SERVER     = 'PUT_YOUR_SERVER_ID_HERE';
const ID_CHANNEL    = 'PUT_YOUR_TEXT_CHANNEL_ID_HERE';
const ID_MESSAGE    = 'PUT_YOUR_MESSAGE_ID_HERE';

const magic = (msg) => {
    const proc = cp.spawn('prboom-plus', ['-iwad', '/home/prophessor/.doomseeker/doom2.wad']);

    proc.stdout.on('data', chunk => {
        msg.edit('```' + chunk.toString().replace(/\x1b.+?m/g, '').slice(0, 1990) + '```');
        // console.log('```' + chunk.toString().replace(/\x1b.+?m/g, '').slice(0, 1990) + '```');
    })
}

bot.on('ready', () => {
    console.log(`Logged in as ${bot.user.tag}!`);
    bot.guilds.get(ID_SERVER).channels.get(ID_CHANNEL).fetchMessage(ID_MESSAGE)
        .then(msg => magic(msg));
});

bot.login(token);