gulpfile.js

'use strict';
var gulp = require('gulp'),
	watch = require('gulp-watch'),
	prefixer = require('gulp-autoprefixer'),
	uglify = require('gulp-uglify'),
	sass = require('gulp-sass'),
	sourcemaps = require('gulp-sourcemaps'),
	rigger = require('gulp-rigger'),
	cssmin = require('gulp-minify-css'),
	imagemin = require('gulp-imagemin'),
	pngquant = require('imagemin-pngquant'),
	browserSync = require("browser-sync"),
	reload = browserSync.reload;

var path = {
	build: {
		html: './',
		js: './js/',
		css: './css/',
		img: './img/',
		fonts: './fonts/'
	},
	src: {
		html: 'src/*.html',
		js: 'src/js/main.js',
		scss: 'src/scss/main.scss',
		img: 'src/img/**/*.*',
		fonts: 'src/fonts/**/*.*'
	},
	watch: {
		html: 'src/**/*.html',
		js: 'src/js/**/*.js',
		scss: 'src/scss/**/*.scss',
		img: 'src/img/**/*.*',
		fonts: 'src/fonts/**/*.*'
	}
};

var config = {
	server: {
		baseDir: "./"
	},
	tunnel: true,
	host: 'localhost',
	port: 9000,
	logPrefix: "Host start"
};

gulp.task('html:build', function () {
	gulp.src(path.src.html)
		.pipe(gulp.dest(path.build.html))
		.pipe(reload({stream: true}));
});

gulp.task('js:build', function () {
	gulp.src(path.src.js)
		.pipe(rigger())
		.pipe(sourcemaps.init())
		.pipe(uglify())
		.pipe(sourcemaps.write())
		.pipe(gulp.dest(path.build.js))
		.pipe(reload({stream: true}));
});

gulp.task('style:build', function(){
	gulp.src(path.src.scss)
		.pipe(sourcemaps.init())
		.pipe(sass({includePaths: ['./src/scss']}))
		.pipe(prefixer())
		.pipe(cssmin())
		.pipe(sourcemaps.write())
		.pipe(gulp.dest(path.build.css))
		.pipe(reload({stream: true}));
});

gulp.task('image:build', function () {
    gulp.src(path.src.img)
        .pipe(imagemin({ 
            progressive: true,
            svgoPlugins: [{removeViewBox: false}],
            use: [pngquant()],
            interlaced: true
        }))
        .pipe(gulp.dest(path.build.img)) 
        .pipe(reload({stream: true}));
});

gulp.task('fonts:build', function() {
    gulp.src(path.src.fonts)
        .pipe(gulp.dest(path.build.fonts))
});


gulp.task('build', [
	'html:build',
	'js:build',
	'style:build',
	'fonts:build',
	'image:build'
]);

gulp.task('watch', function(){
    watch([path.watch.html], function(event, cb) {
        gulp.start('html:build');
    });
    watch([path.watch.scss], function(event, cb) {
        gulp.start('style:build');
    });
    watch([path.watch.js], function(event, cb) {
        gulp.start('js:build');
    });
    watch([path.watch.img], function(event, cb) {
        gulp.start('image:build');
    });
    watch([path.watch.fonts], function(event, cb) {
        gulp.start('fonts:build');
    });
});

gulp.task('webserver', function () {
	browserSync(config);
});

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