From e4ff939ef5f6d610b4ed405efb55a3c63ad77c2b Mon Sep 17 00:00:00 2001
From: Christoph Ladurner <christoph.ladurner@tugraz.at>
Date: Tue, 2 Dec 2025 08:56:39 +0100
Subject: [PATCH] fix: DeprecationWarning

* jsonschema.RefResolver is deprecated as of v4.18.0, in favor of the
  https://github.com/python-jsonschema/referencing library, which provides
  more compliant referencing behavior as well as more flexible APIs for
  customization. A future release will remove RefResolver. Please file a
  feature request (on referencing) if you are missing an API for the kind
  of customization you need.

* resolved by copy pasting code to jsonresolver and using it from there
---
 datacite/jsonutils.py | 5 +++--
 setup.cfg             | 6 ++++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/datacite/jsonutils.py b/datacite/jsonutils.py
index f0ed7d6..f930fae 100644
--- a/datacite/jsonutils.py
+++ b/datacite/jsonutils.py
@@ -3,6 +3,7 @@
 # This file is part of DataCite.
 #
 # Copyright (C) 2016 CERN.
+# Copyright (C) 2025 Graz University of Technology.
 #
 # DataCite is free software; you can redistribute it and/or modify it
 # under the terms of the Revised BSD License; see LICENSE file for
@@ -12,7 +13,7 @@
 
 import json
 
-from jsonschema import RefResolver, validate
+from jsonresolver.contrib.jsonschema import RefResolverBase
 from jsonschema.validators import validator_for
 
 
@@ -25,5 +26,5 @@ def validator_factory(schema_filename):
     validator_cls.check_schema(schema)
 
     return validator_cls(
-        schema, resolver=RefResolver("file:{}".format(schema_filename), schema)
+        schema, resolver=RefResolverBase("file:{}".format(schema_filename), schema)
     )
diff --git a/setup.cfg b/setup.cfg
index bb99ade..f916e41 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -2,6 +2,7 @@
 #
 # Copyright (C) 2015, 2016 CERN.
 # Copyright (C) 2024, California Institute of Technology
+# Copyright (C) 2026 Graz University of Technology.
 #
 # DataCite is free software; you can redistribute it and/or modify it
 # under the terms of the Revised BSD License; see LICENSE file for
@@ -30,7 +31,8 @@ include_package_data = True
 packages = find:
 zip_safe = False
 python_requires = >=3.9
-install_requires = 
+install_requires =
+    jsonresolver>=0.5.0
     jsonschema>=3.0.0
     lxml>=4.5.2
     requests>=2.12.2
@@ -42,7 +44,7 @@ tests =
     responses>=0.10.6
     mock>=1.3.0
     pytest-invenio>=1.4.0
-    pytest-black-ng>=0.4.0
+    pytest-black>=0.6.0
     datacite[docs]
 docs = Sphinx>=4.5.0
 all = datacite[tests]