Merge branch 'release/3.3'

* release/3.3:
  Add @vstoykov to the author list.
  Bump version number.
  Update django-nose version to work with Django 1.9
  Add a missing env to the tox matrix
  Work a compatibility implementation for Django 1.2
  Tells tox to only run the designated env
  Enable the new travis architecture for speed and reliability
  Allow the test to fail fast
  Allow travis to fail for the python3.5 interpreter not yet available
  Use the env conf for travis to split the test builds
  Add tox env for django 1.9
  Update the doc to reflect the new `IMAGEKIT_CACHE_BACKEND` behavior
  Cleaner implementation thanks to @vstoykov explanation
  Handle cases where DEFAULT_CACHE_ALIAS is None in old Django versions
  Do not take a decision on which cache to use in DEBUG mode
  Use a compat method to wrap the new way of retrieving the cache engine

.travis.yml

@@ -1,7 +1,46 @@
 language: python
-python:
-  - 2.7
-install: pip install tox --use-mirrors
-script: tox
+python: "2.7"
+sudo: false
+
+env:
+  - TOX_ENV=py26-django12
+  - TOX_ENV=py26-django13
+  - TOX_ENV=py26-django14
+  - TOX_ENV=py26-django15
+  - TOX_ENV=py26-django16
+  - TOX_ENV=py27-django12
+  - TOX_ENV=py27-django13
+  - TOX_ENV=py27-django14
+  - TOX_ENV=py27-django15
+  - TOX_ENV=py27-django16
+  - TOX_ENV=py27-django17
+  - TOX_ENV=py27-django18
+  - TOX_ENV=py27-django19
+  - TOX_ENV=py32-django15
+  - TOX_ENV=py32-django16
+  - TOX_ENV=py32-django17
+  - TOX_ENV=py32-django18
+  - TOX_ENV=py33-django15
+  - TOX_ENV=py33-django16
+  - TOX_ENV=py33-django17
+  - TOX_ENV=py33-django18
+  - TOX_ENV=py34-django16
+  - TOX_ENV=py34-django17
+  - TOX_ENV=py34-django18
+  - TOX_ENV=py34-django19
+  - TOX_ENV=py35-django19
+
+matrix:
+  # Python 3.5 not yet available on travis, watch this to see when it is.
+  fast_finish: true
+  allow_failures:
+    - env: TOX_ENV=py35-django19
+
+install:
+  - pip install tox --use-mirrors
+
+script:
+  - tox -e $TOX_ENV
+
 notifications:
   irc: "irc.freenode.org#imagekit"

docs/configuration.rst

@@ -44,11 +44,15 @@ Settings
 
 .. attribute:: IMAGEKIT_CACHE_BACKEND
 
-    :default: If ``DEBUG`` is ``True``, ``'django.core.cache.backends.dummy.DummyCache'``.
-    Otherwise, ``'default'``.
+    :default:  ``'default'``
 
-    The Django cache backend to be used to store information like the state of
-    cached images (i.e. validated or not).
+    The Django cache backend alias to retrieve the shared cache instance defined
+    in your settings, as described in the `Django cache section`_.
+
+    The cache is then used to store information like the state of cached
+    images (i.e. validated or not).
+
+.. _`Django cache section`: https://docs.djangoproject.com/en/1.8/topics/cache/#accessing-the-cache
 
 
 .. attribute:: IMAGEKIT_CACHE_PREFIX

imagekit/cachefiles/backends.py

@@ -1,7 +1,6 @@
-from ..utils import get_singleton, sanitize_cache_key
+from ..utils import get_singleton, get_cache, sanitize_cache_key
 import warnings
 from copy import copy
-from django.core.cache import get_cache
 from django.core.exceptions import ImproperlyConfigured
 
 

imagekit/conf.py

@@ -17,25 +17,27 @@ class ImageKitConf(AppConf):
 
     def configure_cache_backend(self, value):
         if value is None:
-            try:
-                from django.core.cache.backends.dummy import DummyCache
-            except ImportError:
-                dummy_cache = 'dummy://'
-            else:
-                dummy_cache = 'django.core.cache.backends.dummy.DummyCache'
-
             # DEFAULT_CACHE_ALIAS doesn't exist in Django<=1.2
             try:
                 from django.core.cache import DEFAULT_CACHE_ALIAS as default_cache_alias
             except ImportError:
                 default_cache_alias = 'default'
 
-            if settings.DEBUG:
-                value = dummy_cache
-            elif default_cache_alias in getattr(settings, 'CACHES', {}):
+            caches = getattr(settings, 'CACHES', None)
+            if caches is None:
+                # Support Django<=1.2 there is no default `CACHES` setting
+                try:
+                    from django.core.cache.backends.dummy import DummyCache
+                except ImportError:
+                    dummy_cache = 'dummy://'
+                else:
+                    dummy_cache = 'django.core.cache.backends.dummy.DummyCache'
+                return dummy_cache
+
+            if default_cache_alias in caches:
                 value = default_cache_alias
             else:
-                value = getattr(settings, 'CACHE_BACKEND', None) or dummy_cache
+                raise ValueError("The default cache alias '%s' is not available in CACHES" % default_cache_alias)
 
         return value
 

imagekit/pkgmeta.py

@@ -1,5 +1,5 @@
 __title__ = 'django-imagekit'
-__author__ = 'Matthew Tretter, Eric Eldredge, Bryan Veloso, Greg Newman, Chris Drackett, Justin Driscoll'
-__version__ = '3.2.7'
+__author__ = 'Matthew Tretter, Venelin Stoykov, Eric Eldredge, Bryan Veloso, Greg Newman, Chris Drackett, Justin Driscoll'
+__version__ = '3.3'
 __license__ = 'BSD'
 __all__ = ['__title__', '__author__', '__version__', '__license__']

imagekit/utils.py

@@ -151,6 +151,16 @@ def call_strategy_method(file, method_name):
         fn(file)
 
 
+def get_cache(backend, **kwargs):
+    try:
+        from django.core.cache import caches
+    except ImportError:
+        from django.core.cache import get_cache
+        return get_cache(backend, **kwargs)
+
+    return caches[backend]
+
+
 def sanitize_cache_key(key):
     if settings.IMAGEKIT_USE_MEMCACHED_SAFE_CACHE_KEY:
         # Memcached keys can't contain whitespace or control characters.

setup.py

@@ -46,7 +46,7 @@ def exec_file(filepath, globalz=None, localz=None):
         'beautifulsoup4==4.1.3',
         'nose>=1.3.6,<1.4',
         'nose-progressive==1.5.1',
-        'django-nose>=1.2,<=1.4',
+        'django-nose>=1.2,<1.5',
         'Pillow<3.0',
         'mock==1.0.1',
     ],

tox.ini

@@ -1,14 +1,27 @@
 [tox]
 envlist =
-    py34-django18, py34-django17, py34-django16,
+    py35-django19,
+    py34-django19, py34-django18, py34-django17, py34-django16,
     py33-django18, py33-django17, py33-django16, py33-django15,
     py32-django18, py32-django17, py32-django16, py32-django15,
-    py27-django18, py27-django17, py27-django16, py27-django15, py27-django14, py27-django13, py27-django12,
-    py26-django15, py26-django14, py26-django13, py26-django12
+    py27-django19, py27-django18, py27-django17, py27-django16, py27-django15, py27-django14, py27-django13, py27-django12,
+    py26-django16, py26-django15, py26-django14, py26-django13, py26-django12
 
 [testenv]
 commands = python setup.py test
 
+[testenv:py35-django19]
+basepython = python3.5
+deps =
+    git+https://github.com/django/django.git@stable/1.9.x#egg=Django
+    django-nose==1.4.2
+
+[testenv:py34-django19]
+basepython = python3.4
+deps =
+    git+https://github.com/django/django.git@stable/1.9.x#egg=Django
+    django-nose==1.4.2
+
 [testenv:py34-django18]
 basepython = python3.4
 deps =
@@ -70,6 +83,12 @@ basepython = python3.2
 deps =
     Django>=1.5,<1.6
 
+[testenv:py27-django19]
+basepython = python2.7
+deps =
+    git+https://github.com/django/django.git@stable/1.9.x#egg=Django
+    git+https://github.com/django-nose/django-nose@master#egg=django-nose
+
 [testenv:py27-django18]
 basepython = python2.7
 deps =
@@ -109,6 +128,11 @@ deps =
     Django>=1.2,<1.3
     django-nose==1.2
 
+[testenv:py26-django16]
+basepython = python2.6
+deps =
+    Django>=1.6,<1.7
+
 [testenv:py26-django15]
 basepython = python2.6
 deps =