python.pkgs.bleach: move expression

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

@@ -0,0 +1,40 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pytest
+, pytestrunner
+, six
+, html5lib
+}:
+
+buildPythonPackage rec {
+  pname = "bleach";
+  version = "2.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0c5w7hh70lqzca7ir71j891csvch1899r8q09zgswk1y00q22lmr";
+  };
+
+  checkInputs = [ pytest pytestrunner ];
+  propagatedBuildInputs = [ six html5lib ];
+
+  meta = {
+    description = "An easy, HTML5, whitelisting HTML sanitizer";
+    longDescription = ''
+      Bleach is an HTML sanitizing library that escapes or strips markup and
+      attributes based on a white list. Bleach can also linkify text safely,
+      applying filters that Django's urlize filter cannot, and optionally
+      setting rel attributes, even on links already in the text.
+
+      Bleach is intended for sanitizing text from untrusted sources. If you
+      find yourself jumping through hoops to allow your site administrators
+      to do lots of things, you're probably outside the use cases. Either
+      trust those users, or don't.
+    '';
+    homepage = https://github.com/mozilla/bleach;
+    downloadPage = https://github.com/mozilla/bleach/releases;
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ prikhi ];
+  };
+}

pkgs/top-level/python-packages.nix

@@ -1746,38 +1746,7 @@ in {
 
   httpserver = callPackage ../development/python-modules/httpserver {};
 
-  bleach = buildPythonPackage rec {
+  bleach = callPackage ../development/python-modules/bleach { };
-    pname = "bleach";
-    version = "2.0.0";
-    name = "${pname}-${version}";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/${builtins.substring 0 1 pname}/${pname}/${name}.tar.gz";
-      sha256 = "0c5w7hh70lqzca7ir71j891csvch1899r8q09zgswk1y00q22lmr";
-    };
-
-    buildInputs = with self; [ pytest pytestrunner ];
-    propagatedBuildInputs = with self; [ six html5lib ];
-
-    meta = {
-      description = "An easy, HTML5, whitelisting HTML sanitizer";
-      longDescription = ''
-        Bleach is an HTML sanitizing library that escapes or strips markup and
-        attributes based on a white list. Bleach can also linkify text safely,
-        applying filters that Django's urlize filter cannot, and optionally
-        setting rel attributes, even on links already in the text.
-
-        Bleach is intended for sanitizing text from untrusted sources. If you
-        find yourself jumping through hoops to allow your site administrators
-        to do lots of things, you're probably outside the use cases. Either
-        trust those users, or don't.
-      '';
-      homepage = https://github.com/mozilla/bleach;
-      downloadPage = https://github.com/mozilla/bleach/releases;
-      license = licenses.asl20;
-      maintainers = with maintainers; [ prikhi ];
-    };
-  };
 
   # needed for tensorflow-tensorboard
   bleach_1_5_0 = self.bleach.overridePythonAttrs rec {