Support for clean-css (https://github.com/GoalSmashers/clean-css/)

compressor/conf.py

@@ -45,6 +45,8 @@ class CompressorConf(AppConf):
     YUGLIFY_BINARY = 'yuglify'
     YUGLIFY_CSS_ARGUMENTS = '--terminal'
     YUGLIFY_JS_ARGUMENTS = '--terminal'
+    CLEAN_CSS_BINARY = 'cleancss'
+    CLEAN_CSS_ARGUMENTS = ''
     DATA_URI_MAX_SIZE = 1024
 
     # the cache backend to use

compressor/filters/cleancss.py

@@ -0,0 +1,10 @@
+from compressor.conf import settings
+from compressor.filters import CompilerFilter
+
+
+class CleanCSSFilter(CompilerFilter):
+    command = "{binary} {args} -o {outfile} {infile}"
+    options = (
+        ("binary", settings.COMPRESS_CLEAN_CSS_BINARY),
+        ("args", settings.COMPRESS_CLEAN_CSS_ARGUMENTS),
+    )

compressor/tests/test_filters.py

@@ -22,6 +22,7 @@ from compressor.filters.closure import ClosureCompilerFilter
 from compressor.filters.csstidy import CSSTidyFilter
 from compressor.filters.yuglify import YUglifyCSSFilter, YUglifyJSFilter
 from compressor.filters.yui import YUICSSFilter, YUIJSFilter
+from compressor.filters.cleancss import CleanCSSFilter
 from compressor.tests.test_base import test_dir
 
 
@@ -372,3 +373,7 @@ class SpecializedFiltersTest(TestCase):
         filter = YUIJSFilter('', verbose=1)
         self.assertEqual(filter.command, '{binary} {args} --type=js --verbose')
         self.assertEqual(filter.options, (('binary', six.text_type('java -jar yuicompressor.jar')), ('args', six.text_type('')), ('verbose', 1)))
+
+    def test_clean_css_filter(self):
+        filter = CleanCSSFilter('')
+        self.assertEqual(filter.options, (('binary', six.text_type('cleancss')), ('args', six.text_type(''))))

docs/settings.txt

@@ -137,9 +137,24 @@ Backend settings
       A filter that uses Zachary Voase's Python port of the YUI CSS compression
       algorithm cssmin_.
 
+    - ``compressor.filters.cleancss.CleanCSSFilter``
+
+      A filter that passes the CSS content to the `clean-css`_ tool.
+
+      .. attribute:: CLEAN_CSS_BINARY
+
+         The clean-css binary filesystem path.
+
+      .. attribute:: CLEAN_CSS_ARGUMENTS
+
+         The arguments passed to clean-css.
+
+
     .. _CSSTidy: http://csstidy.sourceforge.net/
     .. _`data: URIs`: http://en.wikipedia.org/wiki/Data_URI_scheme
     .. _cssmin: http://pypi.python.org/pypi/cssmin/
+    .. _`clean-css`: https://github.com/GoalSmashers/clean-css/
+
 
     - ``compressor.filters.template.TemplateFilter``