fix: dnf5-default-package-manager (#92)

fixes Ultramarine-Linux/triage#66

ultramarine/dnf5-default-package-manager/dnf5-default-package-manager.spec

@@ -2,7 +2,7 @@
 
 Name:       dnf5-default-package-manager
 Version:    0
-Release:    2%?dist
+Release:    3%?dist
 Summary:    Package that sets dnf5 as the default package manager
 License:    MIT
 URL:        https://wiki.ultramarine-linux.org/en/usage/um40-dnf5/
@@ -15,6 +15,7 @@ This package contains post-install hooks that symlinks %_bindir/dnf
 to the new dnf5 binary.
 
 %prep
+touch .placeholder
 
 %build
 
@@ -28,9 +29,14 @@ if [ $1 -gt 1 ]; then
 fi
 
 %preun
-rm %_bindir/{dnf,yum}
-ln -s /usr/bin/dnf-3 /usr/bin/dnf
-ln -s %_bindir/dnf-3 /usr/bin/yum
+echo
+echo "dnf5-default-package-manager will be uninstalled."
+echo "If you want to revert the symlinks, run the following commands:"
+echo "rm %_bindir/{dnf,yum}"
+echo "ln -s /usr/bin/dnf-3 /usr/bin/dnf"
+echo "ln -s %_bindir/dnf-3 /usr/bin/yum"
+echo "For more information, visit: %url"
+echo
 
 %triggerin -- dnf
 rm %_bindir/{dnf,yum}
@@ -41,3 +47,6 @@ ln -s %_bindir/dnf5 /usr/bin/yum
 rm %_bindir/{dnf,yum}
 ln -s %_bindir/dnf5 /usr/bin/dnf
 ln -s %_bindir/dnf5 /usr/bin/yum
+
+%files
+%doc .placeholder