moinmoin: refactor and fix build

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

@@ -0,0 +1,32 @@
+{ lib, buildPythonPackage, fetchurl, fetchpatch
+, pytest, werkzeug, pygments
+}:
+
+buildPythonPackage rec {
+  name = "moinmoin-${ver}";
+  ver = "1.9.9";
+
+  src = fetchurl {
+    url = "http://static.moinmo.in/files/moin-${ver}.tar.gz";
+    sha256 = "197ga41qghykmir80ik17f9hjpmixslv3zjgj7bj9qvs1dvdg5s3";
+  };
+
+  patches = [
+    # Recommended to install on their download page.
+    (fetchpatch {
+      url = "https://bitbucket.org/thomaswaldmann/moin-1.9/commits/561b7a9c2bd91b61d26cd8a5f39aa36bf5c6159e/raw";
+      sha256 = "1nscnl9nspnrwyf3n95ig0ihzndryinq9kkghliph6h55cncfc65";
+    })
+    ./fix_tests.patch
+  ];
+
+  checkInputs = [ pytest werkzeug pygments ];
+
+  meta = with lib; {
+    description = "Advanced, easy to use and extensible WikiEngine";
+
+    homepage = "http://moinmo.in/";
+
+    license = licenses.gpl2Plus;
+  };
+}