Stretch: Manage grub-efi installation

scripts/latecommand/post.stretch.sh

@@ -83,6 +83,26 @@ aptitude -y purge '~c'
 
 ## }}}
 
+# Grub {{{
+
+## If EFI directory is present
+EFI_PATH="/boot/efi"
+if [ -d "${EFI_PATH}" ]; then
+	## Install grub-efi
+	aptitude install -y grub-efi-amd64
+	## Get grub device (keep only some patterns, eg. /dev/sda, /dev/vda, /dev/nvme0n1,…)
+	GRUB_DEVICE=$(sed -n "s;^\(/dev/[a-z]\{3\}\|/dev/nvme[a-z0-9]\{3\}\)\(p[0-9]\|[0-9]\) ${EFI_PATH} .*;\1;p" /etc/mtab)
+	grub-install --target=x86_64-efi "${GRUB_DEVICE}" 2>/dev/null
+	if [ -d "${EFI_PATH}"/EFI ]; then
+		## Copy efi entries to a boot directory
+		mkdir -p -- "${EFI_PATH}"/EFI/boot
+		find "${EFI_PATH}"/EFI/grub -type f -iname "grubx64.efi" -exec cp {} "${EFI_PATH}"/EFI/boot/bootx64.efi \; -quit 2>/dev/null
+		find "${EFI_PATH}"/EFI/debian -type f -iname "grubx64.efi" -exec cp {} "${EFI_PATH}"/EFI/boot/bootx64.efi \; -quit
+	fi
+fi
+
+### }}}
+
 ### Rsyslog {{{
 
 # Install new Rsyslog configuration
@@ -95,7 +115,6 @@ cp -- "${RSYSLOGD_INCLUDE_SRC}"* "${RSYSLOGD_INCLUDE_PATH}"
 systemctl restart rsyslog
 
 ### }}}
-
 ### Logrotate {{{
 
 # Install new Logrotate configuration