Get info about stylesheets

stylesheets.js

'use strict';

var fs = require('fs');
var parse = require('css').parse;
var path = require('path');

var files = []; // Add your files here

var filePaths = files.map(function(file) {
    return path.join(__dirname, file);
});

console.log(filePaths);

Promise.all(filePaths.map(function(file) {
    return Promise.all([
        Promise.resolve(file),
        new Promise(function(resolve, reject) {
            fs.stat(file, function(err, stat) {
                if (err) {
                    return reject(err);
                }
                resolve(stat.size);
            });
        }),
        new Promise(function(resolve, reject) {
            fs.readFile(file, 'utf8', function(err, data) {
                if (err) {
                    return reject(err);
                }

		var rules;
                var rulesCount;

		try {
                    rules = parse(data).stylesheet.rules;
                    rulesCount = rules.reduce(function(total, node) {
                        if (
                            node.type === 'rule' &&
                            Array.isArray(node.selectors)
                        ) {
                            total += node.selectors.length;
                        }
                        return total
                    }, 0);
                    resolve(rulesCount);
                } catch(error) {
                    resolve('?');
                    // reject(error);
                }
            });
        }),
    ]);
}))
    .then(function(results) {
        results.forEach(function(result) {
            console.log('' + result[1] + '\t' + result[2]);
        });
    })
    .catch(function(error) {
        console.error(error);
    });