Fix build with setuptools 58+, call /usr/bin/2to3 instead of setup(use_2to3=True)

This will break again in Python 3.12.
Hopefully, we will get rid of nose by then as upstream won't be able to use it.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=2018972

python-nose-no-use_2to3.patch

@@ -0,0 +1,53 @@
+diff --git a/setup.py b/setup.py
+index a2091c0..7e01bba 100644
+--- a/setup.py
++++ b/setup.py
+@@ -13,8 +13,7 @@ if sys.version_info >= (3,):
+         from distribute_setup import use_setuptools
+         use_setuptools()
+ 
+-    extra = {'use_2to3': True,
+-             'test_dirs': test_dirs,
++    extra = {'test_dirs': test_dirs,
+              'test_build_dir': 'build/tests',
+              'pyversion_patching': True,
+              }
+diff --git a/setup3lib.py b/setup3lib.py
+index 27bdb93..761b74f 100644
+--- a/setup3lib.py
++++ b/setup3lib.py
+@@ -18,7 +18,6 @@ else:
+     import logging
+     from setuptools import Distribution as _Distribution
+     from distutils.core import Command
+-    from setuptools.command.build_py import Mixin2to3
+     from distutils import dir_util, file_util, log
+     import setuptools.command.test
+     from pkg_resources import normalize_path
+@@ -68,7 +67,7 @@ else:
+             self.pyversion_patching = False
+             _Distribution.__init__(self, attrs)
+ 
+-    class BuildTestsCommand (Command, Mixin2to3):
++    class BuildTestsCommand (Command):
+         # Create mirror copy of tests, convert all .py files using 2to3
+         user_options = []
+ 
+@@ -83,7 +82,6 @@ else:
+             self.test_base = test_base
+ 
+         def run(self):
+-            use_2to3 = getattr(self.distribution, 'use_2to3', False)
+             test_dirs = getattr(self.distribution, 'test_dirs', [])
+             test_base = self.test_base
+             bpy_cmd = self.get_finalized_command("build_py")
+@@ -112,9 +110,6 @@ else:
+                             if fn.endswith(ext):
+                                 doc_modified.append(dstfile)
+                                 break
+-            if use_2to3:
+-                self.run_2to3(py_modified)
+-                self.run_2to3(doc_modified, True)
+             if self.distribution.pyversion_patching:
+                 if patch is not None:
+                     for file in modified:

python-nose.spec

@@ -2,7 +2,7 @@
 
 Name:           python-%{modname}
 Version:        1.3.7
-Release:        35%{?dist}
+Release:        36%{?dist}
 BuildArch:      noarch
 
 License:        LGPLv2+ and Public Domain
@@ -26,6 +26,10 @@ Patch3:         python-nose-readunicode.patch
 Patch4:         python-nose-py36.patch
 # Remove a SyntaxWarning (other projects may treat it as error)
 Patch5:         python-nose-py38.patch
+# Remove use_2to3 from setuptools.setup() call
+# We call the command line tool in %%prep instead
+# https://fedoraproject.org/wiki/Changes/Setuptools_58+
+Patch6:         python-nose-no-use_2to3.patch
 
 BuildRequires:  dos2unix
 
@@ -39,6 +43,7 @@ See https://fedoraproject.org/wiki/Changes/DeprecateNose}
 %package -n python3-%{modname}
 Summary:        %{summary}
 BuildRequires:  python3-devel
+BuildRequires:  /usr/bin/2to3
 BuildRequires:  python3-setuptools
 BuildRequires:  python3-coverage >= 3.4-1
 Requires:       python3-setuptools
@@ -58,6 +63,8 @@ Provides:       deprecated()
 dos2unix examples/attrib_plugin.py
 
 %build
+2to3 %{?_smp_mflags} --write --nobackups --no-diffs .
+2to3 %{?_smp_mflags} --write --nobackups --no-diffs -d $(find -name '*.rst')
 %py3_build
 
 %install
@@ -87,6 +94,10 @@ ln -sf nosetests-3.1 %{buildroot}%{_mandir}/man1/nosetests.1
 %{python3_sitelib}/nose/
 
 %changelog
+* Mon Nov 01 2021 Miro Hrončok <mhroncok@redhat.com> - 1.3.7-36
+- Fix build with setuptools 58+
+- Fixes rhbz#2018972
+
 * Fri Jul 23 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.3.7-35
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild