Any file to base64 url cli tool

base64.js

var path = require('path'); 
var fs = require('fs'); 
var mime = 'application/octet-stream'; 
var encoding = 'base64'; 
var data = fs.readFileSync(path.resolve(process.argv[process.argv.length - 2])).toString(encoding); 
var uri = 'data:' + mime + ';' + encoding + ',' + data; 
fs.writeFileSync(path.resolve(process.argv[process.argv.length - 1]), uri)