Handlebars and Coffeescript Watcher

multiwatch.js

function addSlashes( str ) {
    return (str+'').replace(/([\\"'])/g, "\\$1").replace(/\0/g, "\\0");
}
var spawn = require('child_process').spawn;
var growl = require('growl');
var coffee = './node_modules/.bin/coffee';
var coffee_tasks = [];
var handlebars_tasks = [];
coffee_tasks.push(spawn(coffee, ['-cwo', 'static/js', 'static/coffee']));
coffee_tasks.push(spawn(coffee, ['-cwo', 'test', 'test/src']));
handlebars_tasks.push(spawn('node', ['./scripts/watch_handlebars.js']));

coffee_tasks.forEach(function(cmd) {
    cmd.stdout.on('data', function (data) {
      process.stdout.write(data)
      // hack since coffee watcher doesn't output errors to STDERR
      if (/^In /.test(data)) {
          console.log('ERROR')
          growl(data, { title: 'Coffeescript Error'})
      }
    })
    cmd.stderr.on('data', function (data) {
      console.log('ERROR')
      process.stderr.write(data)
    })
});

handlebars_tasks.forEach(function(cmd) {
    cmd.stdout.on('data', function (data) {
      process.stdout.write(data)
    })
    cmd.stderr.on('data', function (data) {
      process.stderr.write('Handlebars Error:')
      var err = data.toString().match(/\nError: .+\n(.*\n){3}/)
      if (err && err[0]) {
          data = err[0]
      }
      process.stderr.write(data)
      data = addSlashes(data);
      growl(data, { title: 'Handlebars Error'})
    })
});