Fix UnicodeEncodeError Manifest.build_one() rises

Author: dahlia

docs/changes.rst

@@ -7,6 +7,9 @@ Version 0.4.2
 To be released.
 
 - Fixed build failing on Mac OS X 10.8 or earlier.  [:issue:`19`]
+- Fixed :exc:`UnicodeEncodeError` that :meth:`Manifest.build_one()
+  <sassutils.builder.Manifest.build_one>` method rises when the input source
+  contains any non-ASCII Unicode characters.
 
 
 Version 0.4.1

sasstests.py

@@ -291,6 +291,24 @@ def test_build_one(self):
                     },
                     json.load(f)
                 )
+            m.build_one(d, 'd.sass', source_map=True)
+            with open(os.path.join(d, 'css', 'd.sass.css')) as f:
+                self.assertEqual(
+                    D_EXPECTED_CSS +
+                    '\n/*# sourceMappingURL=d.sass.css.map */',
+                    f.read()
+                )
+            with open(os.path.join(d, 'css', 'd.sass.css.map')) as f:
+                self.assertEqual(
+                    {
+                        'version': 3,
+                        'file': 'd.sass',
+                        'sources': ['../test/d.sass'],
+                        'names': [],
+                        'mappings': 'AAKA;EAHE,kBAAkB;EAGpB,KAEE;IACE,MAAM'
+                    },
+                    json.load(f)
+                )
         finally:
             shutil.rmtree(d)
 

sassutils/builder.py

@@ -196,8 +196,12 @@ def build_one(self, package_dir, filename, source_map=False):
         if not os.path.exists(css_folder):
             os.makedirs(css_folder)
         with open(css_path, 'w') as f:
-            f.write(css)
+            try:
+                f.write(css)
+            except UnicodeEncodeError:
+                f.write(css.encode('utf-8'))
         if source_map:
-            with open(source_map_path, 'w') as f:
-                f.write(source_map)
+            with open(source_map_path, 'wb') as f:
+                # Source maps are JSON, and JSON has to be UTF-8 encoded
+                f.write(source_map.encode('utf-8'))
         return css_filename