python-packages: Add blivet version 0.16-1.

This still doesn't have all possibly required dependencies, but at least we can
do basic partitioning, which is our primary goal. At least when it comes to the
Hetzner target of nixops. But even for partitioning when installing NixOS this
library could be _very_ useful.

Test cases currently don't work because they're filled with syntax errors and
some references to the mocking library are missing.

As you can see in propagatedBuildInputs, here are the promised overrides for
Python support of libselinux and cryptsetup.

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

pkgs/top-level/python-packages.nix

@@ -451,6 +451,44 @@ pythonPackages = python.modules // rec {
   };
 
 
+  blivet = buildPythonPackage rec {
+    name = "blivet-${version}";
+    version = "0.16-1";
+
+    src = fetchurl {
+      url = "https://git.fedorahosted.org/cgit/blivet.git/snapshot/"
+          + "${name}.tar.bz2";
+      sha256 = "0gfxf86sc0mkpqjcainch6gqh3r7brgma85pbl4nfpzmylhzj5sg";
+    };
+
+    postPatch = ''
+      sed -i -e '/find_library/,/find_library/ {
+        c libudev = "${pkgs.udev}/lib/libudev.so.1"
+      }' blivet/pyudev.py
+      sed -i -e 's|"multipath"|"${pkgs.multipath_tools}/sbin/multipath"|' \
+        blivet/devicelibs/mpath.py blivet/devices.py
+    '';
+
+    propagatedBuildInputs = let
+      pyenable = { enablePython = true; };
+      selinuxWithPython = pkgs.libselinux.override pyenable;
+      cryptsetupWithPython = pkgs.cryptsetup.override pyenable;
+    in [
+      pykickstart pyparted pkgs.udev pyblock
+      selinuxWithPython cryptsetupWithPython
+    ];
+
+    # tests are currently _heavily_ broken upstream
+    doCheck = false;
+
+    meta = {
+      homepage = "https://fedoraproject.org/wiki/Blivet";
+      description = "Module for management of a system's storage configuration";
+      license = [ "GPLv2+" "LGPLv2.1+" ];
+    };
+  };
+
+
   # euca2ools (and maybe Nova) needs boto 1.9, 2.0 doesn't work.
   boto_1_9 = buildPythonPackage (rec {
     name = "boto-1.9b";