Expressjs: API Template Gulp Automation

express.api.routes.js

/**
 * ExpressJS Template Based Routes
 Path: ./
*/
const path = require('path');
const fs = require('fs');
var app = require("express");
var normalizedPath = require("path").join(__dirname, "routes");

async function requireFiles(d, r = false, cb = (f) => { app.use(require(path.join(f, "index.js"))); }) {
    const dir = await fs.promises.opendir(d);
    var f;
    while (f = dir.readSync()) {
        if (!f.isFile()) {
            cb(path.join(d, f.name));
        }
    }
    dir.close();
}

requireFiles('./').catch(console.error);

app.all("*", function(req, res, next) {
  res.send("Hello World Route Present");
})

app.listen(8000, function() {
  console.log("Server started at 8000");
});

gulpfile.js

/**
 * ExpressJS Template Based Routes
 * Path: ./gulpfile.js
 * // // INSTALL GULP
 * // npm install --save-dev gulp
 * // // RUN GULP COMMAND
 * // ./node_modules/.bin/gulp route --name routename
*/

const { src, dest } = require("gulp");

function route(cb, name) {
    const arg = (argList => {
        let arg = {}, a, opt, thisOpt, curOpt;
        for (a = 0; a < argList.length; a++) {
            thisOpt = argList[a].trim();
            opt = thisOpt.replace(/^\-+/, '');
            if (opt === thisOpt) {
                if (curOpt) arg[curOpt] = opt;
                curOpt = null;
            }
            else {
                curOpt = opt;
                arg[curOpt] = true;
            }
        }
        return arg;
    })(process.argv);
  
    src('./templates/*.*')
        .pipe(dest("routes/" + arg.name + "/"));
    cb();
}

exports.route = route;