http://blog.code-infection.com/2012/08/run-nodejs-express-application-from.html

a.js

#!/usr/bin/env node

var sys = require("sys"),
spawn = require('child_process').spawn;

/*
* htmlEntities function is from Chris Coyier
* URL: http://css-tricks.com/snippets/javascript/htmlentities-for-javascript/
*/
function htmlEntities(str) {
return String(str).replace(/&/g, '&')
                .replace(/</g, '&lt;')
                .replace(/>/g, '&gt;')
                .replace(/"/g, '&quot;');
}

(function(path, file) {
console.log("<div style='color: green'>Run "
        + path + "/" + file
        + "</div>");
var app = spawn("node", [path + "/" + file], { cwd: path });
app.stdout.on('data', function(data) {
console.log("<div>"
          + htmlEntities(data)
          + "</div>");
});
app.stderr.on('data', function(data) {
console.log("<div style='color: red'>"
          + htmlEntities(data)
          + "</div>");
});
app.on('exit', function(code) {
console.log('App exited with code ' + code);
});
})(process.env.TM_DIRECTORY, 'app.js');

// by Balazs Nadasdi
// if you find a bug then please send me to [email protected]
// or find me on Google+

b.js

#!/usr/bin/env node

var sys = require("sys"),
spawn = require('child_process').spawn;

/*
* htmlEntities function is from Chris Coyier
* URL: http://css-tricks.com/snippets/javascript/htmlentities-for-javascript/
*/
function htmlEntities(str) {
return String(str).replace(/&/g, '&')
                .replace(/</g, '&lt;')
                .replace(/>/g, '&gt;')
                .replace(/"/g, '&quot;');
}

(function(path, file) {
console.log("<div style='color: green'>Run "
        + file
        + "</div>");
var app = spawn("node", [file], { cwd: path });
app.stdout.on('data', function(data) {
console.log("<div>"
          + htmlEntities(data)
          + "</div>");
});
app.stderr.on('data', function(data) {
console.log("<div style='color: red'>"
          + htmlEntities(data)
          + "</div>");
});
app.on('exit', function(code) {
console.log('App exited with code ' + code);
});
})(process.env.TM_DIRECTORY, process.env.TM_FILEPATH);

// by Balazs Nadasdi
// if you find a bug then please send me to [email protected]
// or find me on Google+