remove packages files from processing

pipeline/storage.py

 try:
-    from staticfiles import finders
     from staticfiles.storage import CachedStaticFilesStorage, StaticFilesStorage
 except ImportError:
-    from django.contrib.staticfiles import finders
     from django.contrib.staticfiles.storage import CachedStaticFilesStorage, StaticFilesStorage
-from django.core.exceptions import ImproperlyConfigured
+
 from django.core.files.storage import get_storage_class
 from django.utils.functional import LazyObject
 
 from pipeline.conf import settings
 
 
-class BaseFinderStorage(StaticFilesStorage):
-    finders = None
-
-    def __init__(self, finders=None, *args, **kwargs):
-        if finders is not None:
-            self.finders = finders
-        if self.finders is None:
-            raise ImproperlyConfigured("The storage %r doesn't have a finders class assigned." % self.__class__)
-        super(BaseFinderStorage, self).__init__(*args, **kwargs)
-
-    def path(self, name):
-        path = self.finders.find(name)
-        if not path:
-            path = super(BaseFinderStorage, self).path(name)
-        return path
-
-    def exists(self, name):
-        exists = self.finders.find(name) != None
-        if not exists:
-            exists = super(BaseFinderStorage, self).exists(name)
-        return exists
-
-
-class PipelineFinderStorage(BaseFinderStorage):
-    finders = finders
-
-
-class PipelineStorage(PipelineFinderStorage):
+class PipelineStorage(StaticFilesStorage):
     def post_process(self, paths, dry_run=False, **options):
         from pipeline.packager import Packager
         if dry_run:
             return []
-        
+
         packager = Packager()
         for package_name in packager.packages['css']:
             package = packager.package_for('css', package_name)
+            for path in package['paths']:
+                if path in paths:
+                    paths.remove(path)
             output_file = packager.pack_stylesheets(package)
             paths.append(output_file)
         for package_name in packager.packages['js']:
             package = packager.package_for('js', package_name)
+            for path in package['paths']:
+                if path in paths:
+                    paths.remove(path)
             output_file = packager.pack_javascripts(package)
             paths.append(output_file)
         return super(PipelineStorage, self).post_process(paths, dry_run, **options)