python312Packages.carbon: fix routers.py

  cachetools,

  fetchPypi,

  nixosTests,

  pytestCheckHook,

  pythonOlder,

  setuptools,

  twisted,

  txamqp,

  version = "1.1.10";

  pyproject = true;

  disabled = pythonOlder "3.10";

  src = fetchPypi {

    inherit pname version;

    hash = "sha256-wTtbqRHMWBcM2iFN95yzwCf/BQ+EK0vp5MXT4mKX3lw=";

  };

  patches = [

    # imp has been removed from python since version 3.12

    # This patch replaces it with distutils.utils

    ./replace-imp.patch

  ];

  # Carbon-s default installation is /opt/graphite. This env variable ensures

  # carbon is installed as a regular Python module.

  GRAPHITE_NO_PREFIX = "True";

    inherit (nixosTests) graphite;

  };

  pythonImportsCheck = [ "carbon" ];

  pythonImportsCheck = [

    "carbon"

    "carbon.routers"

  ];

  meta = with lib; {

  meta = {

    description = "Backend data caching and persistence daemon for Graphite";

    homepage = "https://github.com/graphite-project/carbon";

    changelog = "https://github.com/graphite-project/carbon/releases/tag/${version}";

    license = licenses.asl20;

    maintainers = with maintainers; [

    license = lib.licenses.asl20;

    maintainers = with lib.maintainers; [

      offline

      basvandijk

    ];

diff --git a/lib/carbon/routers.py b/lib/carbon/routers.py

index d1c47b7..1a70d7e 100644

--- a/lib/carbon/routers.py

+++ b/lib/carbon/routers.py

@@ -1,4 +1,4 @@

-import imp

+import importlib.util

 from carbon.hashing import ConsistentHashRing, carbonHash

 from carbon.util import PluginRegistrar

 from six import with_metaclass

@@ -130,9 +130,8 @@ class ConsistentHashingRouter(DatapointRouter):

   def setKeyFunctionFromModule(self, keyfunc_spec):

     module_path, func_name = keyfunc_spec.rsplit(':', 1)

-    module_file = open(module_path, 'U')

-    description = ('.py', 'U', imp.PY_SOURCE)

-    module = imp.load_module('keyfunc_module', module_file, module_path, description)

+    spec = importlib.util.spec_from_file_location("keyfunc_module", module_path)

+    module = importlib.util.module_from_spec(spec)

     keyfunc = getattr(module, func_name)

     self.setKeyFunction(keyfunc)