gulpfile.js

var gulp           = require('gulp'),
		gutil          = require('gulp-util' ),
		sass           = require('gulp-sass'),
		sourcemap			 = require('gulp-sourcemaps'),
		browserSync    = require('browser-sync'),
		concat         = require('gulp-concat'),
		uglify         = require('gulp-uglify'),
		cleanCSS       = require('gulp-clean-css'),
		rename         = require('gulp-rename'),
		del            = require('del'),
		imagemin       = require('gulp-imagemin'),
		cache          = require('gulp-cache'),
		autoprefixer   = require('gulp-autoprefixer'),
		ftp            = require('vinyl-ftp'),
		notify         = require("gulp-notify"),
		minify			   = require("gulp-minify");

// Скрипты проекта

gulp.task('common-js', function() {
	return gulp.src([
		'app/js/common.js',
	])
	.pipe(concat('common.min.js'))
	// .pipe(minify({
	// 	ext:{
	// 		min:'.min.js'
	// 	},
	// }))
	.pipe(gulp.dest('app/js'));
});

gulp.task('js', ['common-js'], function() {
	return gulp.src([
		'app/libs/jquery/jquery-1.11.0.min.js',
		'app/libs/jquery-ui-1.12.1.custom/jquery-ui.min.js',
		'app/libs/jquery.maskedinput/jquery.maskedinput.min.js',
		'app/libs/magnific-popup/jquery.magnific-popup.min.js',
		'app/libs/scroll2id/PageScroll2id.min.js',
		'app/libs/perfect-scrollbar/perfect-scrollbar.jquery.min.js',
		'app/js/common.min.js', // Всегда в конце
		])
	.pipe(concat('scripts.min.js'))
	.pipe(gulp.dest('app/js'))
	.pipe(concat('scripts.js'))
	.pipe(gulp.dest('app/js'))
	// .pipe(minify({
	// 	ext:{
	// 		min:'.min.js'
	// 	},
	// }))
	// .pipe(uglify()) // Минимизировать весь js (на выбор)
	.pipe(gulp.dest('app/js'))
	.pipe(browserSync.reload({stream: true}));
});

gulp.task('js-build', function() {
	return gulp.src([
		'app/js/scripts.js',
		])
	//.pipe(concat('scripts.min.js'))
	.pipe(minify({
		ext:{
			min:'.min.js'
		},
	}))
	// .pipe(uglify()) // Минимизировать весь js (на выбор)
	.pipe(gulp.dest('app/js'))
});

gulp.task('browser-sync', function() {
	browserSync({
		server: {
			baseDir: 'app'
		},
		notify: false,
		// tunnel: true,
		// tunnel: "projectmane", //Demonstration page: http://projectmane.localtunnel.me
	});
});

gulp.task('sass', function() {
	return setTimeout(function(){
		gulp.src('./app/sass/**/*.+(sass|scss)')
		.pipe(sourcemap.init())
		.pipe(sass().on("error", notify.onError()))
		.pipe(rename({suffix: '.min', prefix : ''}))
		.pipe(autoprefixer(['last 15 versions']))
		.pipe(sourcemap.write('./'))
		.pipe(gulp.dest('app/css'))
		.pipe(browserSync.stream({match: '**/*.css'}));
	}, 50);
});

gulp.task('watch', ['sass', 'js', 'browser-sync'], function() {
	gulp.watch('app/sass/**/*.sass', ['sass']);
	gulp.watch(['libs/**/*.js', 'app/js/common.js'], ['js']);
	gulp.watch('app/*.html', browserSync.reload);
});

gulp.task('imagemin', function() {
	return gulp.src('app/img/**/*')
	.pipe(cache(imagemin()))
	.pipe(gulp.dest('dist/img')); 
});

gulp.task('build', ['removedist', 'imagemin', 'sass', 'js-build'], function() {

	var buildFiles = gulp.src([
		'app/*.html',
		'app/.htaccess',
		]).pipe(gulp.dest('dist'));

	var buildCss = gulp.src([
		'app/css/main.min.css',
		])
	.pipe(cleanCSS())
	.pipe(gulp.dest('dist/css'));

	var buildJs = gulp.src([
		'app/js/scripts.min.js',
		])
	.pipe(gulp.dest('dist/js'));

	var buildFonts = gulp.src([
		'app/fonts/**/*',
		]).pipe(gulp.dest('dist/fonts'));

});

gulp.task('deploy', function() {

	var conn = ftp.create({
		host:      'hostname.com',
		user:      'username',
		password:  'userpassword',
		parallel:  10,
		log: gutil.log
	});

	var globs = [
	'dist/**',
	'dist/.htaccess',
	];
	return gulp.src(globs, {buffer: false})
	.pipe(conn.dest('/path/to/folder/on/server'));

});

gulp.task('removedist', function() { return del.sync('dist'); });
gulp.task('clearcache', function () { return cache.clearAll(); });

gulp.task('default', ['watch']);