gulpfile.js

// "autoprefixer-core": "^4.0.0",
// "gulp-postcss": "^3.0.0",
// "gulp-sass": "^1.1.0",
// "postcss-assets": "^0.9.0"

var gulp = require ('gulp')
var browserify = require ('gulp-browserify')
var uglify = require ('gulp-uglify')
var insert = require ('gulp-insert')
var stylus = require ('gulp-stylus')
var csso = require ('gulp-csso')
var zip = require ('gulp-zip')

var release = './release/'

function comment (version) {
    return require ('fs').readFileSync ('./source/header.js')
                         .toString ()
                         .replace (/\$version/g, version)
}

gulp.task ('js', function () {
  var version = require ('./package.json').version
  
  return gulp.src ('./source/likely.js')
    .pipe (browserify ())
    .pipe (uglify ())
    .pipe (insert.prepend (comment (version)))
    .pipe (gulp.dest (release))
})

gulp.task ('css', function () {
  return gulp.src ('./styles/likely.styl')
    .pipe (stylus ())
    .pipe (csso ())
    .pipe (gulp.dest (release))
})

gulp.task ('zip', ['js', 'css'], function () {
  var version = require ('./package.json').version
  
  return gulp.src ([
    release + 'license.txt',
    release + 'likely.css',
    release + 'likely.js',
  ])
    .pipe (zip ('ilya-birman-likely-' + version + '.zip'))
    .pipe (gulp.dest (release))
})

gulp.task ('build', ['js', 'css'])

gulp.task ('default', ['js', 'css', 'zip'], function () {
  gulp.watch ('source/*.js', ['zip'])
  gulp.watch ('source/services/*.js', ['zip'])
  gulp.watch ('styles/*.styl', ['zip'])
  gulp.watch ('license.txt', ['zip'])
})