fix(postcss-plugin): Allow urls without quotes

Author: jantimon

lib/postcss-plugin.js

@@ -1,7 +1,7 @@
 var postcss = require('postcss');
 var getResolvedFilename = require('./webpack-resolver.js');
 var path = require('path');
-var urlRegexp = new RegExp('url\\(("([^"]+)"|\'([^\']+)\'|([^\\)+]))\\)');
+var urlRegexp = new RegExp('url\\(("([^"]+)"|\'([^\']+)\'|([^\'")]+))\\)');
 var _ = require('lodash');
 var crypto = require('crypto');
 
@@ -10,7 +10,10 @@ var crypto = require('crypto');
  */
 function getRelativeIconPath (value) {
   var relativePathResult = urlRegexp.exec(value);
-  return relativePathResult ? (relativePathResult[2] || relativePathResult[3] || relativePathResult[4]) : undefined;
+  if (!relativePathResult) {
+    throw new Error(`Could not parse url "${value}".`);
+  }
+  return relativePathResult[2] || relativePathResult[3] || relativePathResult[4];
 }
 
 function parseFontIconValue (value) {
@@ -42,9 +45,7 @@ function getSvgPaths (postCssRoot, compiler, context) {
   postCssRoot.walkDecls((decl) => {
     if (decl.prop === 'font-icon') {
       var fontIcon = parseFontIconValue(decl.value);
-      if (fontIcon.url) {
-        relativePaths.push(fontIcon.url);
-      }
+      relativePaths.push(fontIcon.url);
     }
   });
   relativePaths = _.uniq(relativePaths);