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'use strict';

// Include Gulp & Tools We'll Use

var gulp = require('gulp');

var $ = require('gulp-load-plugins')();

var del = require('del');

var runSequence = require('run-sequence');

var pagespeed = require('psi');

var app = require('./server');

var vinylfs = require('vinyl-fs');

var AUTOPREFIXER_BROWSERS = [

'ie >= 10',

'ie_mob >= 10',

'ff >= 30',

'chrome >= 34',

'safari >= 7',

'opera >= 23',

'ios >= 7',

'android >= 4.4',

'bb >= 10'

];

// Lint JavaScript

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

return gulp.src('site-assets/*.js')

.pipe($.jshint())

.pipe($.jshint.reporter('jshint-stylish'));

});

// Optimize Images

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

return gulp.src('site-assets/*.{png,jpg,svg}')

.pipe($.cache($.imagemin({

progressive: true,

interlaced: true

})))

.pipe(gulp.dest('dist/site-assets'))

.pipe($.size({title: 'images'}));

});

// Copy All Files At The Root Level (app)

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

return vinylfs.src([

'examples/**',

'bower_components/**',

'learn.json',

'CNAME',

'.nojekyll',

'site-assets/favicon.ico'

], {

dots: true,

base: './',

followSymlinks: false,

})

.pipe(vinylfs.dest('dist'))

.pipe($.size({title: 'copy'}));

});

// Compile and Automatically Prefix Stylesheets

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

// For best performance, don't add Sass partials to `gulp.src`

return gulp.src([

'site-assets/*.css'

])

.pipe($.autoprefixer(AUTOPREFIXER_BROWSERS))

.pipe(gulp.dest('dist/site-assets'))

.pipe($.size({title: 'styles'}))

.pipe(gulp.dest('.tmp/site-assets'));

});

// Scan Your HTML For Assets & Optimize Them

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

var assets = $.useref.assets({searchPath: '{.tmp,.}'});

return gulp.src('index.html')

.pipe(assets)

.pipe(assets.restore())

.pipe($.useref())

// Output Files

.pipe(gulp.dest('dist'))

// Running vulcanize over the written output

// because it requires access to the written

// CSS and JS.

.pipe($.vulcanize({ dest: 'dist', strip: true }))

.pipe($.size({title: 'html'}));

});

// Clean Output Directory

gulp.task('clean', del.bind(null, ['.tmp', 'dist']));

// Build Production Files, the Default Task

gulp.task('default', ['clean'], function (cb) {

runSequence(['styles', 'copy'], ['jshint', 'html', 'images'], cb);

});

// Run PageSpeed Insights

// Update `url` below to the public URL for your site

gulp.task('pagespeed', pagespeed.bind(null, {

// By default, we use the PageSpeed Insights

// free (no API key) tier. You can use a Google

// Developer API key if you have one. See

// http://goo.gl/RkN0vE for info key: 'YOUR_API_KEY'

url: 'https://todomvc.com',

strategy: 'mobile'

}));

gulp.task('serve', function (cb) {

app.listen(8080, cb);

});

gulp.task('test-server', function (cb) {

app.listen(8000, cb);

});