Gulp for project. Необходимый минимум для оптимизации проекта на битре

gulpfile.js

var gulp = require('gulp');
var rename = require("gulp-rename");
var uglify = require('gulp-uglify');
var cleanCSS = require('gulp-clean-css');
var templateName = 'main';
var imagemin = require('gulp-imagemin');

gulp.task('imagemin',function () {
    return gulp.src([
        templateName + '/**/*.{png,gif,jpg,jpeg,svg}',
        '../../images/**/*.{png,gif,jpg,jpeg,svg}'
    ], {base: './'})
        .pipe(imagemin())
        .pipe(gulp.dest('./'));
});

gulp.task('uglify-js', function () {
    return gulp.src([
        templateName + '/**/*.js',
        '!' + templateName + '/**/*.min.js',
        '!' + templateName + '/**/*.map.js'
    ])
        .pipe(uglify().on('error', function() {
            console.log(arguments)
        }))
        .pipe(rename(function (path) {
            path.basename += '.min';
        }))
        .pipe(gulp.dest(templateName + '/'));
});

gulp.task('minify-css', function() {
    return gulp.src([
        templateName + '/**/*.css',
        '!' + templateName + '/**/*.min.css',
        '!' + templateName + '/**/*.map.css'
    ])
        .pipe(cleanCSS({
            compatibility: 'ie8',
            advanced: false
        }))
        .pipe(rename(function (path) {
            path.basename += '.min';
        }))
        .pipe(gulp.dest(templateName + '/'));
});

gulp.task('default', ['uglify-js', 'minify-css']);