import python3-3.6.8-40.el8

SPECS/python3.spec

@@ -14,7 +14,7 @@ URL: https://www.python.org/
 #  WARNING  When rebasing to a new Python version,
 #           remember to update the python3-docs package as well
 Version: %{pybasever}.8
-Release: 39%{?dist}
+Release: 40%{?dist}
 License: Python
 
 
@@ -656,10 +656,10 @@ Requires: python3-setuptools-wheel
 Requires: python3-pip-wheel
 %endif
 
-# Runtime require alternatives
-Requires:         %{_sbindir}/alternatives
-Requires(post):   %{_sbindir}/alternatives
-Requires(postun): %{_sbindir}/alternatives
+# Require alternatives version that implements the --keep-foreign flag
+Requires:         alternatives >= 1.19.1-1
+Requires(post):   alternatives >= 1.19.1-1
+Requires(postun): alternatives >= 1.19.1-1
 
 # This prevents ALL subpackages built from this spec to require
 # /usr/bin/python3*. Granularity per subpackage is impossible.
@@ -800,6 +800,9 @@ Provides: %{name}-tools = %{version}-%{release}
 Provides: %{name}-tools%{?_isa} = %{version}-%{release}
 Obsoletes: %{name}-tools < %{version}-%{release}
 
+
+# Require alternatives version that implements the --keep-foreign flag
+Requires(postun): alternatives >= 1.19.1-1
 # python36 installs the alternatives master symlink to which we attach a slave
 Requires: python36
 Requires(post): python36
@@ -1407,7 +1410,7 @@ alternatives --install %{_bindir}/unversioned-python \
 %postun -n platform-python
 # Do this only during uninstall process (not during update)
 if [ $1 -eq 0 ]; then
-    alternatives --remove python \
+    alternatives --keep-foreign --remove python \
                           %{_libexecdir}/no-python
 
 fi
@@ -1422,7 +1425,7 @@ alternatives --add-slave python3 %{_bindir}/python3.6 \
 %postun -n python3-idle
 # Do this only during uninstall process (not during update)
 if [ $1 -eq 0 ]; then
-    alternatives --remove-slave python3 %{_bindir}/python3.6 \
+    alternatives --keep-foreign --remove-slave python3 %{_bindir}/python3.6 \
        idle3
 fi
 
@@ -1865,6 +1868,10 @@ fi
 # ======================================================
 
 %changelog
+* Thu Jul 29 2021 Tomas Orsava <torsava@redhat.com> - 3.6.8-40
+- Adjusted the postun scriptlets to enable upgrading to RHEL 9
+- Resolves: rhbz#1933055
+
 * Fri Jul 09 2021 Victor Stinner <vstinner@redhat.com> - 3.6.8-39
 - Fix reentrant call to threading.enumerate() (rhbz#1959459)
 - Don't exit Python with abort() when a thread exit and there is no available