gulpfile.js

var path = require('path');
var _ = require('lodash');
var gulp = require('gulp');
var browserSync = require('browser-sync').create();
var protractor = require("gulp-protractor").protractor;
var Server = require('karma').Server;
var jshint = require('gulp-jshint');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
var modRewrite = require('connect-modrewrite');
var gulp = require('gulp');

var config = {
	paths: {
		scripts: ['./src/*.js']
	}
};

// Build
gulp.task('build', function() {
	return gulp.src(config.paths.scripts)
		.pipe(uglify({
			preserveComments: 'some'
		}))
		.pipe(gulp.dest('docs/'))
		.pipe(rename({
			extname: '.min.js'
		}))
		.pipe(gulp.dest('dist/'));
});

// Lint
gulp.task('lint', function() {
	return gulp.src(config.paths.scripts)
		.pipe(jshint())
		.pipe(jshint.reporter('default'));
});

gulp.task('test', ['lint'], function(done) {
	var server = new Server({
		configFile: path.resolve('karma.conf.js')
	});

	server.on('browser_error', function (browser, err) {
		throw err;
	});

	server.on('run_complete', function (browsers, results) {
		if (results.failed) {
			throw new Error('Karma: Tests Failed');
		}

		done();
	});

	server.start();
});

gulp.task('test-e2e', ['serve-e2e'], function() {
	return gulp.src(['./test/e2e/**/*.js'])
		.pipe(protractor({
			configFile: './protractor.conf.js'
		}))
		.on('error', function(e) {
			browserSync.exit();
			throw e;
		})
		.on('end', function(e) {
			browserSync.exit();
		});
});

// Watch
gulp.task('watch', function() {
	gulp.watch(config.paths.scripts, ['lint']);
});

// Serve
gulp.task('serve', ['watch'], function() {
	serve({
		port: 3000
	});

	gulp.watch('*.html').on('change', browserSync.reload);
});

gulp.task('serve-e2e', function(done) {
	serve({
		notify: false,
		logConnections: false,
		logFileChanges: false,
		open: false,
		port: 3333
	});
	done();
});

function serve(config, done) {
	var defaults = {
		notify: false,
		logConnections: true,
		logFileChanges: true,
		open: true,
		port: 3000,
		server: {
			baseDir: ['./', './docs', './src'],
			middleware: [
				modRewrite([
					'!\\.html|\\.js|\\.svg|\\.css|\\.png|\\.jpg|\\.woff|\\.woff2|\\.ttf|\\.csv /docs/index.html'
				])
			]
		}

	};

	browserSync.init(_.extend({}, defaults, config));
}

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