Convert dir of files .svg files to optimized base64 uris compatible as LESS variables

svgless.js

#!/usr/bin/env node

/*
 * Convert dir of files .svg files to optimized base64 uris
 * compatible as LESS variables
 */

var
  fs = require('fs'),
  path = require('path'),
  svgo = require('svgo'),
  async = require('async');

var dir = process.argv.length >= 3 ? process.argv[2] : __dirname;

var files = fs.readdirSync(dir);
files = files.filter(function(fn) {
  return path.extname(fn) == '.svg';
});

async.each(files, function(filepath, cb) {
  fs.readFile(filepath, 'utf8', function(err, data) {

    if (err) {
      cb(err);
    }

    var svg = new svgo();
    svg.optimize(data, function(result) {
      var fp = path.basename(filepath, '.svg').toLowerCase().replace(new RegExp('[_ ]', 'g'), '-');
      var base64 = new Buffer(result.data).toString('base64');
      console.log('@' + fp + ': url(data:image/svg+xml;base64,' + base64 + ');\n');
      cb();
    });
  });
}, function(r) {
  // console.log('err', r);
});