python: keyring: support Python 2

pkgs/development/python-modules/keyring/2.nix

@@ -0,0 +1,33 @@
+{ stdenv, buildPythonPackage, fetchPypi
+, dbus-python, setuptools_scm, entrypoints, secretstorage
+, pytest, pytest-flake8 }:
+
+buildPythonPackage rec {
+  pname = "keyring";
+  version = "18.0.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0f58jq58jhfzlhix7x2zz7c4ycdvcs1z3sgs4lkr4xxx680wrmk7";
+  };
+
+  nativeBuildInputs = [ setuptools_scm ];
+
+  checkInputs = [ pytest pytest-flake8 ];
+
+  propagatedBuildInputs = [ dbus-python entrypoints ] ++ stdenv.lib.optional stdenv.isLinux secretstorage;
+
+  doCheck = !stdenv.isDarwin;
+
+  checkPhase = ''
+    py.test
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Store and access your passwords safely";
+    homepage    = "https://pypi.python.org/pypi/keyring";
+    license     = licenses.psfl;
+    maintainers = with maintainers; [ lovek323 orivej ];
+    platforms   = platforms.unix;
+  };
+}

pkgs/top-level/python-packages.nix

@@ -3686,7 +3686,10 @@ in {
 
   jupyterhub-ldapauthenticator = callPackage ../development/python-modules/jupyterhub-ldapauthenticator { };
 
-  keyring = callPackage ../development/python-modules/keyring { };
+  keyring = if isPy3k then
+    callPackage ../development/python-modules/keyring { }
+  else
+    callPackage ../development/python-modules/keyring/2.nix { };
 
   keyutils = callPackage ../development/python-modules/keyutils { inherit (pkgs) keyutils; };