script.js

#!/usr/bin/env node

var exec = require('child_process').exec,
    rmdir = require('rimraf'),
    outputPath = 'public';




rmdir(outputPath, function(error){

  if ( !error ) {
    exec('broccoli build '+outputPath, function(err,out) { 
      console.log(err || 'Finished broccoli build');
    });
  } else {
    console.log(err);
  }

});