python-packages: Add pyudev in version 0.16.1.

Thought this would be needed for blivet, but it wasn't the case. They seem to
have their own mini-implementation. But it might be useful for other Nixers, who
knows?

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

pkgs/top-level/python-packages.nix

@@ -3737,6 +3737,32 @@ pythonPackages = python.modules // rec {
     };
   });
 
+
+  pyudev = buildPythonPackage rec {
+    name = "pyudev-${version}";
+    version = "0.16.1";
+
+    src = fetchurl {
+      url = "https://pypi.python.org/packages/source/p/pyudev/${name}.tar.gz";
+      md5 = "4034de584b6d9efcbfc590a047c63285";
+    };
+
+    postPatch = ''
+      sed -i -e '/udev_library_name/,/^ *libudev/ {
+        s|CDLL([^,]*|CDLL("${pkgs.udev}/lib/libudev.so.1"|p; d
+      }' pyudev/_libudev.py
+    '';
+
+    propagatedBuildInputs = [ pkgs.udev ];
+
+    meta = {
+      homepage = "http://pyudev.readthedocs.org/";
+      description = "Pure Python libudev binding";
+      license = stdenv.lib.licenses.lgpl21Plus;
+    };
+  };
+
+
   pynzb = buildPythonPackage (rec {
     name = "pynzb-0.1.0";