Gulp demo setup

gulpfile.js

'use strict';

var gulp = require('gulp'),
	sass = require('gulp-sass'),
	autoprefixer = require('gulp-autoprefixer'),
	livereload = require('gulp-livereload'),
	sourcemaps = require('gulp-sourcemaps'),
	concat = require('gulp-concat'),
	rename = require('gulp-rename'),
	uglify = require('gulp-uglify');

var sassFiles = 'public/css/scss/**/*.scss';

gulp.task('styles', function() {
	return gulp.src(sassFiles)
		.pipe(sourcemaps.init()) // uncomment for source maps
		.pipe(sass({
			outputStyle: 'compressed' // uncomment for CSS compression
		}).on('error', sass.logError))
		// .pipe(autoprefixer('last 2 version')) // uncomment for autoprefixing
		.pipe(sourcemaps.write('./')) // uncomment for source maps
		.pipe(gulp.dest('public/css'));
});

var jsFiles = [
		'public/js/vendor/**/*.js',
		'public/js/src/main.js'
	],
	jsDest = 'public/js';

gulp.task('scripts', function() {
	return gulp.src(jsFiles)
		// .pipe(sourcemaps.init())  // uncomment for source maps
		.pipe(concat('main.min.js'))
		// .pipe(uglify()) // uncomment for compression
		// .pipe(sourcemaps.write('./')) // uncomment for source maps
		.pipe(gulp.dest('public/js'));
});

gulp.task('watch', function() {
	gulp.watch(sassFiles, ['styles']);
	gulp.watch(jsFiles, ['scripts']);
	livereload.listen();
	gulp.watch([sassFiles, 'craft/templates/**']).on('change', livereload.changed);
});

gulp.task('default', [], function() {
	gulp.start('styles', 'scripts');
});

package.json

{
  "name": "project",
  "version": "1.0.0",
  "description": "Project Description",
  "main": "public/index.html",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "git+ssh://[email protected]/org/repo.git"
  },
  "author": "YOURNAME",
  "license": "UNLICENSED",
  "homepage": "https://bitbucket.org/org/repo#readme",
  "devDependencies": {
    "gulp": "^3.9.1",
    "gulp-autoprefixer": "^3.1.1",
    "gulp-concat": "^2.6.0",
    "gulp-livereload": "^3.8.1",
    "gulp-rename": "^1.2.2",
    "gulp-sass": "^2.3.1",
    "gulp-sourcemaps": "^1.6.0",
    "gulp-uglify": "^1.5.3"
  }
}