pythonPackages.darcsver: Move to own file

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

@@ -0,0 +1,29 @@
+{ stdenv, buildPythonPackage, fetchPypi, isPy3k, mock }:
+
+buildPythonPackage rec {
+  pname = "darcsver";
+  version = "1.7.4";
+
+  disabled = isPy3k;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1yb1c3jxqvy4r3qiwvnb86qi5plw6018h15r3yk5ji3nk54qdcb6";
+  };
+
+  buildInputs = [ mock ];
+
+  # Note: We don't actually need to provide Darcs as a build input.
+  # Darcsver will DTRT when Darcs isn't available.  See news.gmane.org
+  # http://thread.gmane.org/gmane.comp.file-systems.tahoe.devel/3200 for a
+  # discussion.
+
+  # AttributeError: 'module' object has no attribute 'test_darcsver'
+  doCheck = false;
+
+  meta = with stdenv.lib; {
+    description = "Darcsver, generate a version number from Darcs history";
+    homepage = https://pypi.python.org/pypi/darcsver;
+    license = "BSD-style";
+  };
+}