gulpfile.coffee

gulp = require 'gulp'
livereload = require 'gulp-livereload'
watch = require 'gulp-watch'
coffee = require 'gulp-coffee'
exec = require('child_process').exec

gulp.task 'watch', ->
  watch glob: "app/public/.phrozn/**/*.twig", (files) ->
    console.log "Executing 'phr up'"
    exec 'cd app/public;phr up'
  gulp.src ["app/public/**/*.html"]
    .pipe(watch())
    .pipe(livereload(35719))

gulpfile.js

require('coffee-script/register');
require('./gulpfile.coffee');