Made filename generator configurable

README.md

@@ -189,6 +189,24 @@ like this:
 
             return on_my_cdn.get(uri, uri)
 
+Advanced configuration with DJANGO_STATIC_FILENAME_GENERATOR
+----------------------------------------------------
+
+By default, django-static generates filenames for your combined files 
+using timestamps. You can use your own filename generating function
+by setting it in settings, like so:
+
+        DJANGO_STATIC_FILENAME_GENERATOR = 'myapp.filename_generator'
+
+This is expected to be the equivalent of this import statement:
+
+        from myapp import filename_generator
+
+Where `myapp` is a python module, and `filename_generator` is a regular
+python function. Here's the skeleton for that function:
+
+  def filename_generator(file_parts, new_m_time):
+      return ''.join([file_parts[0], '.%s' % new_m_time, file_parts[1]])
 
 Compression Filters
 ---------------------------

django_static/templatetags/django_static.py

@@ -93,6 +93,20 @@ def file_proxy_nothing(uri, *args, **kwargs):
         return file_proxy_nothing
 file_proxy = _load_file_proxy()
 
+def _load_filename_generator():
+    filename_generator = getattr(settings, 'DJANGO_STATIC_FILENAME_GENERATOR', None)
+    if filename_generator:
+        from django.utils.importlib import import_module
+        _module_name, _function_name = filename_generator.rsplit('.', 1)
+        file_generator_module = import_module(_module_name)
+        return getattr(file_generator_module, _function_name)
+    def default_filename_generator(apart, new_m_time):
+        new_filename = ''.join([apart[0], '.%s' % new_m_time, apart[1]])
+        return new_filename
+    return default_filename_generator
+
+_generate_filename = _load_filename_generator()
+
 # this defines what keyword arguments you can always expect to get from in the
 # file proxy function you've defined.
 fp_default_kwargs = dict(new=False, changed=False, checked=False, notfound=False)
@@ -469,9 +483,7 @@ def wrap_up(filename):
         if not m_time:
             # We did not have the filename in the map OR it has changed
             apart = os.path.splitext(filename)
-            new_filename = ''.join([apart[0],
-                                '.%s' % new_m_time,
-                                apart[1]])
+            new_filename = _generate_filename(apart, new_m_time)
             fileinfo = (settings.DJANGO_STATIC_NAME_PREFIX + new_filename,
                         new_m_time)