code that takes either a file or string formatted in markdown

markdown.js

var parser = require('node-markdown');
var fs = require('fs');
var argv = require('optimist').argv;
var file = argv._[0];

var markdown = fs.readFileSync(file, 'UTF-8');

//markdown passed in as a file
markdown = parser.Markdown(markdown);

//markdown passed in as a string
var string = parser.Markdown("**bold** *italic* [link](http://www.neti.ee) `code block`");

console.log("Output from our markdown file:");
console.log(markdown);

console.log("Output from our string:");
console.log(string);