Adapt the gulp hot reload file and apply to partial.js directory structure. (ignored public folder at the moment)

Gulpfile.js

// NOTE: I previously suggested doing this through Grunt, but had plenty of problems with
// my set up. Grunt did some weird things with scope, and I ended up using nodemon. This
// setup is now using Gulp. It works exactly how I expect it to and is WAY more concise.
var gulp = require('gulp');
var spawn = require('child_process').spawn;
var node;
var config = require('./package.json');
/**
 * $ gulp server
 * description: launch the server. If there's a server already running, kill it.
 */
gulp.task('server', function () {
  if (node) node.kill();
  node = spawn('node', [config.main], { stdio: 'inherit' });
  node.on('close', function (code) {
    if (code === 8) {
      gulp.log('Error detected, waiting for changes...');
    }
  });
});

/**
 * $ gulp
 * description: start the development environment
 */
gulp.task('default', function () {
  gulp.run('server');

  gulp.watch([`./${config.main}`, './lib/**/*.js'], function () {
    gulp.run('server');
  });

  // Need to watch for sass changes too? Just add another watch call!
  // no more messing around with grunt-concurrent or the like. Gulp is
  // async by default.
});

// clean up if an error goes unhandled.
process.on('exit', function () {
  if (node) node.kill();
});