!48 fix the installation failure of grub2-efi-x64/grub2-efi-aa64 package on the /boot partition of VFAT file system

From: @zhangqiumiao
Reviewed-by: @t_feng
Signed-off-by: @t_feng

grub.macros

@@ -277,6 +277,8 @@ Requires:	%{name}-common = %{evr}					\
 Requires:	%{name}-tools-minimal >= %{evr}				\
 Requires:	%{name}-tools-extra = %{evr}				\
 Requires:	%{name}-tools = %{evr}					\
+Requires(pre):	%{name}-tools = %{evr}					\
+Requires(postun):	%{name}-tools = %{evr}				\
 Provides:	%{name}-efi = %{evr}					\
 %{?legacy_provides:Provides:	%{name} = %{evr}}			\
 %{-o:Obsoletes:	%{name}-efi < %{evr}}					\
@@ -284,6 +286,19 @@ Provides:	%{name}-efi = %{evr}					\
 %{expand:%%description %{1}}						\
 %{desc}									\
 This subpackage provides support for %{1} systems.			\
+%pre %{1}								\
+res=$(grub2-probe /boot)						\
+if [ "xvfat" != "x$res" -a "xfat" != "x$res" ]; then			\
+	ln -sf ../efi/EFI/%{efi_vendor}/grubenv /boot/grub2/grubenv	\
+fi									\
+									\
+%postun %{1}								\
+if [ "x0" == "x$1" ];then						\
+	res=$(grub2-probe /boot)					\
+	if[ "xvfat" != "x$res" -a "xfat" != "x$res" ];then		\
+        	rm -f /boot/grub2/grubenv				\
+	fi								\
+fi									\
 									\
 %{expand:%%{?!buildsubdir:%%define buildsubdir grub-%{1}-%{tarversion}}}\
 %{expand:%if 0%{?with_efi_modules}					\

grub2.spec

@@ -7,7 +7,7 @@
 Name:		grub2
 Epoch:		1
 Version:	2.04
-Release:	11
+Release:	12
 Summary:	Bootloader with support for Linux, Multiboot and more
 License:	GPLv3+
 URL:		http://www.gnu.org/software/grub/
@@ -448,6 +448,13 @@ rm -r /boot/grub2.tmp/ || :
 %{_datadir}/man/man*
 
 %changelog
+* Wed Mar 17 2021 zhangqiumiao <zhangqiumiao1@huawei.com> - 2.04-12
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:fix the installation failure of grub2-efi-x64/grub-efi-aa64 packages on
+       the /boot partition of VFAT file system.
+
 * Tue Mar 62 2021 hanhui <hanhui15@huawei.com> - 2.04-11
 - Type:cves
 - Id:CVE-2020-27779 CVE-2020-14372