gulpfile.js

/**
 *  Welcome to your gulpfile!
 *  The gulp tasks are splitted in several files in the gulp directory
 *  because putting all here was really too long
 */

'use strict';

var gulp = require('gulp');
var wrench = require('wrench');

/**
 *  This will load all js or coffee files in the gulp directory
 *  in order to load all gulp tasks
 */
wrench.readdirSyncRecursive('./gulp').filter(function(file) {
  return (/\.(js|coffee)$/i).test(file);
}).map(function(file) {
  require('./gulp/' + file);
});


/**
 *  Default task clean temporaries directories and launch the
 *  main optimization build task
 */
gulp.task('default', ['clean'], function () {
  gulp.start('build');
});

var uglify = require('gulp-uglify');
var cssnano = require('gulp-cssnano');

gulp.task('useref', function(){
  return gulp.src('app/*.html')
    .pipe(useref())
    .pipe(gulpIf('*.js', uglify()))
    // Minifies only if it's a CSS file
    .pipe(gulpIf('*.css', cssnano()))
    .pipe(gulp.dest('dist'))
});

gulp.task('styles', function(){
  return gulp.src('src/assets/css/*.css', {style: 'expanded'})
    .pipe(gulp.dest('dist/assets/css'))
    .pipe(cssnano())
    .pipe(gulp.dest('dist/assets/css'))
});