Little script to run node on change to single file target

node-watcher.js

#!/usr/bin/env node
var path = require('path');
var watch = require('node-watch');
var parseArgs = require('minimist');
var argv = parseArgs(process.argv.slice(2));
var exec = require('child_process').spawn;

var trimNewLine = /\s+$/;
require('colors');

if(argv._.length > 0) {
  var filepath = argv._[0];
  watch(filepath, function(filename) {
    var child = exec('node', [filename]);
    child.stdout.on('data', function(data) {
      console.log((data.toString().replace(trimNewLine,'')).white);
    });
    child.stderr.on('data', function(data) {
      console.log(('Error: ' + data.toString()).red);
    });
    child.on('exit', function(err) {
      if(err) {
        console.log(('Error in running node on ' + filename).yellow);
      }
    });
  });
}

1. Grab the script, drop it somewhere, and in the same directory run:
   $ npm install minimist && npm install node-watch && npm install colors
2. Add alias for ease of use:
   alias watchfile='node /path/to/node-watcher.js $1'
3. Run anywhere:
   $ watchfile quickidea.js