Make svg sprite with no pain (watch inside)

spriter.js

var fs = require('fs');
var path = require('path');
var sys = require('sys');
var exec = require('child_process').exec;

makeSprite();
console.log('start watching');

exec('svgo -f ./src/assets/icons' , () => {
    fs.watch(`${__dirname}/src/assets/icons`, (eventType, filename) => {
        if (filename) {
            console.log(`filename provided: ${filename}`);
        } else {
            console.log('filename not provided');
        }
        makeSprite();
    });
    makeSprite();
});


function makeSprite() {
    console.log('rebuild started...');
    exec('svg-sprite-generate -d ./src/assets/icons -o sprite.svg',
        (error, stdout, stderr) => {
            if (error !== null) {
                return console.log('exec error: ' + error);
            }
            try {
                const svgSprite = fs.readFileSync(path.resolve(`${__dirname}/sprite.svg`), "utf-8");
                console.log('rebuild complete!');
            } catch (err) {
                console.info("Check sprite file!");
            }
        });
}