Load Plugins

gulpfile.js

/**
 * Load Plugins.
 *
 * Load gulp plugins and assign them semantic names.
 */
var gulp         = require('gulp'); // Gulp of-course

// CSS related plugins.
var sass         = require('gulp-sass'); // Gulp pluign for Sass compilation
var autoprefixer = require('gulp-autoprefixer'); // Autoprefixing magic
var minifycss    = require('gulp-uglifycss'); // Minifies CSS files

// JS related plugins.
var concat       = require('gulp-concat'); // Concatenates JS files
var uglify       = require('gulp-uglify'); // Minifies JS files

// Utility related plugins.
var rename       = require('gulp-rename'); // Renames files E.g. style.css -> style.min.css
var sourcemaps   = require('gulp-sourcemaps'); // Maps code in a compressed file (E.g. style.css) back to it’s original position in a source file (E.g. structure.scss, which was later combined with other css files to generate style.css)
var notify       = require('gulp-notify'); // Sends message notification to you