From f01b24d06015c6886adb17c867edd5b36c0d69e2 Mon Sep 17 00:00:00 2001
From: Pavel Cahyna <pcahyna@redhat.com>
Date: Tue, 14 Jan 2025 19:08:07 +0100
Subject: [PATCH] Fix upgrades from non-alternativized versions

Both of the same package and of other packages (genisoimage and wodim
from cdrkit).

Inspired by https://src.fedoraproject.org/rpms/mandoc/pull-request/4

Resolves: RHEL-74055
---
 libisoburn.spec | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/libisoburn.spec b/libisoburn.spec
index df5fc8b..2b67273 100644
--- a/libisoburn.spec
+++ b/libisoburn.spec
@@ -69,6 +69,7 @@ Requires:        kf5-filesystem >= 5
 Requires(post):  /sbin/install-info
 Requires(preun): /sbin/install-info
 %endif
+Requires(pre):   %{_sbindir}/alternatives, coreutils
 Requires(post):  %{_sbindir}/alternatives, coreutils
 Requires(preun): %{_sbindir}/alternatives
 Provides: cdrecord
@@ -178,6 +179,16 @@ cd releng
 
 %ldconfig_scriptlets
 
+%pre -n xorriso%{?variant}
+# remove alternativized files if they are not symlinks
+# otherwise upgrades from non-alternativized versions do not work
+# the list of files should be kept in sync with the "alternatives"
+# commands in %%post
+for f in cdrecord wodim mkisofs genisoimage ; do
+    [ -L %{_bindir}/$f ] || %{__rm} -f %{_bindir}/$f || :
+    [ -L %{_mandir}/man1/$f.1.gz ] || %{__rm} -f %{_mandir}/man1/$f.1.gz || :
+done
+
 %post -n xorriso%{?variant}
 %if 0%{?rhel} == 7
 /sbin/install-info %{_infodir}/xorrecord.info.gz %{_infodir}/dir || :