Second part of gulp tak – converting SVG Sprite to separate files

gulpfile.js

var gulp = require('gulp');
var config = require('./config.json');
var del = require('del');
var svg2png = require('gulp-svg2png');
var graphicsmagick = require('gulp-gm');

...
gulp.src("./build/svg_files_" + colorName + "/*.svg")
        .pipe(svg2png())
        .pipe(gulp.dest("./build/png_files_" + colorName))
        .on('end', function() {
            console.log(timestamp('[hh:mm:ss] ') + "PNG files were created");
            console.log(timestamp('[hh:mm:ss] ') + "Resizing PNG files...");
            gulp.src("./build/png_files_" + colorName + "/*.png")
                    .pipe(graphicsmagick(function(gmfile) {
                        return gmfile.resize(config.image.width, config.image.height);
                    }))
                    .pipe(gulp.dest("./build/png_files_" + colorName + "_" + config.image.width.toString() + "_" + config.image.height.toString()))
                    .on('end', function() {
                        del(["./build/png_files_" + colorName, "./build/svg_files_" + colorName], function(err, paths) {
                            if (err) {
                                return console.log(timestamp('[hh:mm:ss] ') + err);
                            }
                        });
                    });
            console.log(timestamp('[hh:mm:ss] ') + "PNG files were resized");
        });
...