Markdown TOC generator

createTOC.js

/*
 *  Quck Node.js script to create the TOC for a *.md markdown file
 */
var Remarkable = require('remarkable')
var toc = require('markdown-toc')
var fs = require('fs')

function render(str, options) {
    return new Remarkable()
        .use(toc.plugin(options)) // register plugin
        .render(str);
}

if(process.argv.length == 2) {
    console.log("Please enter the README.md file as first command line argument!")
    return;
}

fs.readFile(process.argv[2], 'utf8', function(err, data) {
    if (err) throw err;
    console.log("Contents of README file passed: " + data);
    var resultTOC = render(data)
    console.log("Table of contents to paste into README.md:\n\n");
    console.log(resultTOC.content);
});