Switch to a BLS configuration on %%post

By default the old grubby tool isn't installed anymore and it's part of
the grubby-deprecated package. Instead the grubby wrapper that modifies
BLS config files is installed for backward compatiblity with old grubby.

So on postinstall the bootloader configuration has to be changed to BLS
since non-BLS bootloader configuration won't be updated anymore without
the old grubby tool and the new-kernel-pkg script.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>

grubby.spec

@@ -1,6 +1,6 @@
 Name: grubby
 Version: 8.40
-Release: 19%{?dist}
+Release: 20%{?dist}
 Summary: Command line tool for updating bootloader configs
 License: GPLv2+
 URL: https://github.com/rhinstaller/grubby
@@ -38,6 +38,8 @@ Requires: s390utils-base
 %endif
 Requires: findutils
 
+Obsoletes:	%{name}-bls
+
 %description
 This package provides a grubby compatibility script that manages
 BootLoaderSpec files and is meant to only be used for legacy compatibility
@@ -76,9 +78,21 @@ sed -e "s,@@LIBEXECDIR@@,%{_libexecdir}/grubby,g" %{SOURCE2} \
 sed -e "s,@@LIBEXECDIR@@,%{_libexecdir}/installkernel,g" %{SOURCE3} \
 	> %{buildroot}%{_sbindir}/installkernel
 
+%post
+if [ "$1" = 2 ]; then
+    arch=$(uname -m)
+    if [[ $arch == "s390x" ]]; then
+        command=zipl-switch-to-blscfg
+    else
+        command=grub2-switch-to-blscfg
+    fi
+
+    $command --backup-suffix=.rpmsave &>/dev/null || :
+fi
+
 %package deprecated
 Summary:	Legacy command line tool for updating bootloader configs
-Conflicts:	%{name} <= 8.40-13
+Conflicts:	%{name} <= 8.40-18
 
 %description deprecated
 This package provides deprecated, legacy grubby.  This is for temporary
@@ -115,6 +129,9 @@ current boot environment.
  %{_mandir}/man8/*.8*
 
 %changelog
+* Tue Nov 13 2018 Javier Martinez Canillas <javierm@redhat.com> - 8.40-20
+- Switch to a BLS configuration on %%post
+
 * Tue Nov 06 2018 Javier Martinez Canillas <javierm@redhat.com> - 8.40-19
 - Make the temporary config wrapper be what "grubby" contains, and put
   traditional grubby in grubby-deprecated (pjones)