Intercept console.log output and write to file

gistfile1.js

var util = require('util');
var fs = require('fs');
var log = fs.createWriteStream('stdout.log');

console.log = console.info = function(t) {
    var out;
    if (t && ~t.indexOf('%')) {
        out = util.format.apply(util, arguments);
        process.stdout.write(out + '\n');
        return;
    } else {
        out = Array.prototype.join.call(arguments, ' ');
    }
    out && log.write(out + '\n');
};