pythonPackages.django_classtags: refactor move to python-modules

pkgs/development/python-modules/django_classytags/default.nix

@@ -0,0 +1,27 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, django
+}:
+
+buildPythonPackage rec {
+  pname = "django-classy-tags";
+  version = "0.6.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0wxvpmjdzk0aajk33y4himn3wqjx7k0aqlka9j8ay3yfav78bdq0";
+  };
+
+  propagatedBuildInputs = [ django ];
+
+  # tests appear to be broken on 0.6.1 at least
+  doCheck = ( version != "0.6.1" );
+
+  meta = with stdenv.lib; {
+    description = "Class based template tags for Django";
+    homepage = https://github.com/ojii/django-classy-tags;
+    license = licenses.bsd3;
+  };
+
+}

pkgs/top-level/python-packages.nix

@@ -2289,26 +2289,7 @@ in {
     propagatedBuildInputs = with self; [ django ];
   });
 
-  django_classytags = buildPythonPackage rec {
+  django_classytags = callPackage ../development/python-modules/django_classytags { };
-    name = "django-classy-tags-${version}";
-    version = "0.6.1";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/d/django-classy-tags/${name}.tar.gz";
-      sha256 = "0wxvpmjdzk0aajk33y4himn3wqjx7k0aqlka9j8ay3yfav78bdq0";
-    };
-
-    propagatedBuildInputs = with self; [ django ];
-
-    # tests appear to be broken on 0.6.1 at least
-    doCheck = ( version != "0.6.1" );
-
-    meta = {
-      description = "Class based template tags for Django";
-      homepage = https://github.com/ojii/django-classy-tags;
-      license = licenses.bsd3;
-    };
-  };
 
   # This package may need an older version of Django.
   # Override the package set and set e.g. `django = super.django_1_9`.