gulpfile.js

var gulp = require('gulp');
var sass = require('gulp-sass');
var concat = require('gulp-concat');
var minifyCss = require('gulp-minify-css');
var rename = require('gulp-rename');
var compass = require('gulp-compass');
var uglify = require('gulp-uglify');
var using = require('gulp-using');
var beep = require('beepbeep');
var livereload = require('gulp-livereload');

var paths = {
  sass: ['public/assets/scss/**/*.scss'],
  js: ['public/assets/js/**/*.js']
};

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

gulp.task('compass', function (done) {
  gulp.src('public/assets/scss/**/*.scss')
    .pipe(using())
    .pipe(compass({
      css: 'public/assets/build/css',
      sass: 'public/assets/scss'
    }))
    .pipe(minifyCss({
      keepSpecialComments: 0
    }))
    .pipe(rename({ extname: '.min.css' }))
    .pipe(gulp.dest('public/assets/build/css'))
    .pipe(livereload());

  beep();
  done();
});

gulp.task('uglify', function (done) {
  gulp.src('public/assets/js/**/*.js')
    .pipe(using())
    .pipe(concat('app'))
    .pipe(uglify({
      'mangle': false
    }))
    .pipe(rename({ extname: '.min.js' }))
    .pipe(gulp.dest('public/assets/build/js'))
    .pipe(livereload());

  beep();
  done();
});

gulp.task('watch', function () {
  livereload.listen();
  gulp.watch(paths.sass, ['compass']);
  gulp.watch(paths.js, ['uglify']);
});