LessFilter (see lesscss.org)

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

compressor/conf/settings.py

@@ -11,6 +11,8 @@ COMPRESS = getattr(settings, 'COMPRESS', not settings.DEBUG)
 COMPRESS_CSS_FILTERS = getattr(settings, 'COMPRESS_CSS_FILTERS', ['compressor.filters.css_default.CssAbsoluteFilter'])
 COMPRESS_JS_FILTERS = getattr(settings, 'COMPRESS_JS_FILTERS', ['compressor.filters.jsmin.JSMinFilter'])
 
+COMPRESS_LESSC_BINARY = getattr(settings, 'COMPRESS_LESSC_BINARY', 'lessc')
+
 if COMPRESS_CSS_FILTERS is None:
     COMPRESS_CSS_FILTERS = []
 

compressor/filters/less.py

@@ -0,0 +1,31 @@
+import os
+import warnings
+import tempfile
+
+from compressor.conf import settings
+from compressor.filters import FilterBase, FilterError
+
+warnings.simplefilter('ignore', RuntimeWarning)
+
+class LessFilter(FilterBase):
+
+    def output(self, **kwargs):
+        
+        tmp_file = tempfile.NamedTemporaryFile(mode='w+b')
+        tmp_file.write(self.content)
+        tmp_file.flush()
+        
+        output_file = tempfile.NamedTemporaryFile(mode='w+b')
+        
+        command = '%s %s %s' % (settings.COMPRESS_LESSC_BINARY, tmp_file.name, output_file.name)
+
+        command_output = os.popen(command).read()
+        
+        filtered_css = output_file.read()
+        output_file.close()
+        tmp_file.close()
+        
+        if self.verbose:
+            print command_output
+        
+        return filtered_css