From d22ecc4c51f7aeecceb664499f51df04d623b73b Mon Sep 17 00:00:00 2001
From: Jakub Pawlowicz <contact@jakubpawlowicz.com>
Date: Tue, 15 Sep 2015 06:54:42 +0100
Subject: [PATCH] Fixed #668 - node v4 path.join.

Backporting node v4 fix as path.join does not accept undefined as
a parameter anymore.
---
 History.md          | 5 +++++
 lib/urls/rewrite.js | 4 ++--
 test/module-test.js | 8 ++++++++
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/History.md b/History.md
index 251b5e5a..f3509be6 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,8 @@
+[3.4.3 / 2015-xx-xx](https://github.com/jakubpawlowicz/clean-css/compare/v3.4.2...3.4)
+==================
+
+* Fixed issue [#668](https://github.com/jakubpawlowicz/clean-css/issues/668) - node v4 path.join.
+
 [3.4.2 / 2015-09-14](https://github.com/jakubpawlowicz/clean-css/compare/v3.4.1...v3.4.2)
 ==================
 
diff --git a/lib/urls/rewrite.js b/lib/urls/rewrite.js
index 4d7b2c11..f2f1152d 100644
--- a/lib/urls/rewrite.js
+++ b/lib/urls/rewrite.js
@@ -35,12 +35,12 @@ function isData(uri) {
 
 function absolute(uri, options) {
   return path
-    .resolve(path.join(options.fromBase, uri))
+    .resolve(path.join(options.fromBase || '', uri))
     .replace(options.toBase, '');
 }
 
 function relative(uri, options) {
-  return path.relative(options.toBase, path.join(options.fromBase, uri));
+  return path.relative(options.toBase, path.join(options.fromBase || '', uri));
 }
 
 function normalize(uri) {
diff --git a/test/module-test.js b/test/module-test.js
index c6ac3f25..5b425863 100644
--- a/test/module-test.js
+++ b/test/module-test.js
@@ -66,6 +66,14 @@ vows.describe('module tests').addBatch({
       assert.lengthOf(errors, 1);
     }
   },
+  'with callback passed to remote import': {
+    topic: function () {
+      new CleanCSS({ processImportFrom: ['local'] }).minify('@import url(https://fonts.googleapis.com/css?family=Open+Sans);', this.callback);
+    },
+    'should yield no error and minify': function (errors, minified) {
+      assert.equal(minified.styles, '@import url(https://fonts.googleapis.com/css?family=Open+Sans);');
+    }
+  },
   'no debug': {
     'topic': function () {
       return new CleanCSS().minify('a{ color: #f00 }');
-- 
2.34.1