[pve-devel] [PATCH kernel-helper v2 2/2] proxmox-boot-tool: check if correct grub metapackage is installed

[Stoiko Ivanov]

this part of the hook applies only to systems not using pbt for
bootmangement.

Currently our ISO installs grub-pc unconditionally - and never the
conflicting grub-efi-amd64. Both packages are responsible for
running grub-install (for the appropriate disks) upon an upgrade of
grub.

This results in grub currently not getting updated on uefi-booted
systems (which do not use proxmox-boot-tool).

The patch causes a warning to be printed to notify the user.

Also considered putting the check+warning in d/postinst - but this way
it will get triggered more often (upon every
kernel-upgrade/update-initramfs, instead of only on
proxmox-kernel-helper updates, which are less often), increasing the
chances of being noticed.

checking for the changelog-presence was chosen, over `dpkg-query` for
the status, for consistency with the similar patch for pve7to8 (and
potentially a small speed-gain).

Suggested-by: Thomas Lamprecht <t.lamprecht at proxmox.com>
Signed-off-by: Stoiko Ivanov <s.ivanov at proxmox.com>
---
 src/proxmox-boot/zz-proxmox-boot | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/src/proxmox-boot/zz-proxmox-boot b/src/proxmox-boot/zz-proxmox-boot
index 1adc1b1..4dfa765 100755
--- a/src/proxmox-boot/zz-proxmox-boot
+++ b/src/proxmox-boot/zz-proxmox-boot
@@ -215,6 +215,23 @@ disable_systemd_boot_hook() {
 
 }
 
+check_grub_efi_package() {
+
+	if [ -f "${ESP_LIST}" ]; then
+		return
+	fi
+
+	if [ ! -d /sys/firmware/efi ]; then
+		return
+	fi
+
+	if [ -f /usr/share/doc/grub-efi-amd64/changelog.Debian.gz ]; then
+		return
+	fi
+	warn "uefi-booted system, without grub-efi-amd64 package - /boot/efi will not be updated"
+
+}
+
 set -- $DEB_MAINT_PARAMS
 mode="${1#\'}"
 mode="${mode%\'}"
@@ -228,6 +245,7 @@ case $0:$mode in
 		BOOT_KVERS="$(boot_kernel_list "$@")"
 		update_esps
 		disable_systemd_boot_hook
+		check_grub_efi_package
 	;;
 	 */postrm.d/*:|*/postrm.d/*:remove)
 		reexec_in_mountns "$@"
@@ -235,6 +253,7 @@ case $0:$mode in
 		BOOT_KVERS="$(boot_kernel_list)"
 		update_esps
 		disable_systemd_boot_hook
+		check_grub_efi_package
 	;;
 esac
 
-- 
2.39.2