Backport a patch to make python-sphinx work with Python 3.10-rc1

types.Union was renamed to types.UnionType, causing Sphinx to crash

python-sphinx.spec

@@ -44,6 +44,9 @@ Source0:    %{pypi_source %{upstream_name} %{upstream_version}}
 # Allow extra themes to exist. We pull in python3-sphinx-theme-alabaster
 # which causes that test to fail.
 Patch1:     sphinx-test_theming.diff
+# `types.Union` was renamed to `types.UnionType` on the HEAD of Python 3.10
+# (refs: python/cpython#27342). Afterwars, sphinx-build crashes because of ImportError
+Patch2:     rename-types-Union-to-types-UnionType.patch
 
 BuildArch:     noarch
 
@@ -368,6 +371,7 @@ mkdir %{buildroot}%{python3_sitelib}/sphinxcontrib
 * Mon Aug 02 2021 Karolina Surma <ksurma@redhat.com> - 1:4.1.2-1
 - Update to 4.1.2
 - Fixes rhbz#1979326
+- Backport commit to fix python-sphinx with Python 3.10-rc1
 
 * Fri Jul 23 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1:4.0.2-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild

rename-types-Union-to-types-UnionType.patch

@@ -0,0 +1,49 @@
+From 8b2031c747e7c7e6b845ee2e3db47de617d33cc6 Mon Sep 17 00:00:00 2001
+From: Takeshi KOMIYA <i.tkomiya@gmail.com>
+Date: Fri, 30 Jul 2021 01:27:38 +0900
+Subject: [PATCH] Fix #9512: sphinx-build: crashed with the HEAD of Python 3.10
+
+Recently, `types.Union` was renamed to `types.UnionType` on the HEAD
+of 3.10 (refs: python/cpython#27342). After this change, sphinx-build
+has been crashed because of ImportError.
+---
+ sphinx/util/typing.py | 12 ++++++------
+ 1 files changed, 8 insertions(+), 6 deletions(-)
+
+diff --git a/sphinx/util/typing.py b/sphinx/util/typing.py
+index f1723c035a..012d32e524 100644
+--- a/sphinx/util/typing.py
++++ b/sphinx/util/typing.py
+@@ -33,10 +33,10 @@ def _evaluate(self, globalns: Dict, localns: Dict) -> Any:
+             ref = _ForwardRef(self.arg)
+             return ref._eval_type(globalns, localns)
+ 
+-if sys.version_info > (3, 10):
+-    from types import Union as types_Union
+-else:
+-    types_Union = None
++try:
++    from types import UnionType  # type: ignore  # python 3.10 or above
++except ImportError:
++    UnionType = None
+ 
+ if False:
+     # For type annotation
+@@ -114,7 +114,7 @@ def restify(cls: Optional[Type]) -> str:
+             return ':class:`%s`' % INVALID_BUILTIN_CLASSES[cls]
+         elif inspect.isNewType(cls):
+             return ':class:`%s`' % cls.__name__
+-        elif types_Union and isinstance(cls, types_Union):
++        elif UnionType and isinstance(cls, UnionType):
+             if len(cls.__args__) > 1 and None in cls.__args__:
+                 args = ' | '.join(restify(a) for a in cls.__args__ if a)
+                 return 'Optional[%s]' % args
+@@ -337,7 +337,7 @@ def _stringify_py37(annotation: Any) -> str:
+     elif hasattr(annotation, '__origin__'):
+         # instantiated generic provided by a user
+         qualname = stringify(annotation.__origin__)
+-    elif types_Union and isinstance(annotation, types_Union):  # types.Union (for py3.10+)
++    elif UnionType and isinstance(annotation, UnionType):  # types.Union (for py3.10+)
+         qualname = 'types.Union'
+     else:
+         # we weren't able to extract the base type, appending arguments would