Bunch of tweaks and fixes.

lib/scss.mustache

@@ -27,7 +27,7 @@ $sprite: (
 );
 
 @mixin use-sprite($name) {
-  background: transparent '{{& url}}' no-repeat;
+  background: transparent url('{{& url}}') no-repeat;
   background-position: map-get($sprite, $name);
   background-size: {{bounds.width}}px {{bounds.height}}px;
 }

lib/spritemaker.js

@@ -1,16 +1,16 @@
 /**
  * Copyright (c) 2019-present Tomek Wójcik <contact@bthlabs.pl>
- * 
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
@@ -87,8 +87,8 @@ const spritemaker = (options) => {
   const hash = crypto.Hash('md5');
   hash.update(outputImage.data);
 
-  const outputBasename = `sprite-${hash.digest('hex')}`;
-  const outputName = `${outputBasename}.png`;
+  const outputBasename = `sprite`;
+  const outputName = `${outputBasename}-${hash.digest('hex')}.png`;
   const outbutBuffer = PNG.sync.write(outputImage, {
     colorType: 6
   });
@@ -99,16 +99,19 @@ const spritemaker = (options) => {
   const template = fs.readFileSync(
     path.resolve(__dirname, 'scss.mustache'), {encoding: 'utf-8'}
   );
-  const outputURL = new URI(options.urlPrefix).path('/' + outputName);
   const context = {
     bounds: bounds,
     images: spriteMap,
-    url: outputURL.href()
+    url: path.join(options.urlPrefix, outputName)
   };
   const scss = Mustache.render(template, context);
+
+  const scssName = `${outputBasename}.scss`;
   fs.writeFileSync(
-    path.resolve(options.output, `${outputBasename}.scss`), scss
+    path.resolve(options.output, scssName), scss
   );
+
+  return [outputName, scssName];
 };
 
 module.exports = {