Made the CSSTidyFilter function.

Signed-off-by: Jannis Leidel <jannis@leidel.info>

AUTHORS

@@ -3,6 +3,7 @@ Christian Metts
 Django Compressor's filters started life as the filters from Andreas Pelme's
 django-compress.
 
+Aaron Godfrey
 Atamert Ölçgen
 Ben Spaulding
 Brad Whittington

compressor/filters/csstidy.py

@@ -1,6 +1,6 @@
-import os
-import warnings
+from subprocess import Popen, PIPE
 import tempfile
+import warnings
 
 from django.conf import settings
 
@@ -21,7 +21,8 @@ class CSSTidyFilter(FilterBase):
 
         command = '%s %s %s %s' % (BINARY, tmp_file.name, ARGUMENTS, output_file.name)
 
-        command_output = os.popen(command).read()
+        command_output = Popen(command, shell=True,
+            stdout=PIPE, stdin=PIPE, stderr=PIPE).communicate()
 
         filtered_css = output_file.read()
         output_file.close()