efibootmgr: change kernel hook logic

srcpkgs/efibootmgr/files/efibootmgr-kernel-hook.confd

@@ -1,10 +1,9 @@
 # Options for the kernel hook script installed by the efibootmgr package.
-MODIFY_EFI_ENTRIES=0
-# To allow efibootmgr to modify boot entries, set
-# MODIFY_EFI_ENTRIES=1
-# Kernel command-line options.  Example:
-# OPTIONS="root=/dev/sda3 loglevel=4"
-# Disk where EFI Partition is.  Default is /dev/sda
-# DISK="/dev/sda"
-# Partition number of EFI Partition.  Default is 1
-# PART=1
+#
+# Allow efibootmgr to update kernels and initramfs in the EFI partition.
+# This will keep two kernels and initramfs, the most recently configured
+# version will be vmlinuz-A.efi and initramfs-A.img while your previously
+# configured kernel and initramfs will be vmlinuz-B.efi and initramfs-B.img.
+# This does NOT modify efi entries, you must add one for kernel A and B with
+# efibootmgr(1).
+# UPDATE_KERNELS=yes

srcpkgs/efibootmgr/files/kernel.d/efibootmgr.post-install

@@ -4,42 +4,29 @@
 #
 # Arguments passed to this script: $1 pkgname, $2 version.
 #
-PKGNAME="$1"
+#PKGNAME="$1"
 VERSION="$2"
 
 . "${ROOTDIR}/etc/default/efibootmgr-kernel-hook"
-if [ "x${MODIFY_EFI_ENTRIES}" != x1 ]; then
+
+if [ ! "${UPDATE_KERNELS}" ]; then
 	exit 0
 fi
 
-OPTIONS="${OPTIONS} initrd=/initramfs-${VERSION}.img"
+#TODO: need a way to detect where the user has there EFI Boot partition
+EFI=/boot/efi
 
-args=""
-if [ "x${DISK}" != x ]; then
-	args="-d $DISK"
-fi
-if [ "x${PART}" != x ]; then
-	args="$args -p $PART"
+# move previous kernel to vmlinuz-B.efi and initramfs-B.img
+if [ -e "$EFI/vmlinuz-A.efi" ]
+then
+	mv "$EFI/vmlinuz-A.efi" "$EFI/vmlinuz-B.efi"
 fi
 
-# get major version, e.g. "4.8" for "linux4.8"
-major_version=$(echo $PKGNAME | cut -c 6-)
-
-# look for previous entry for this major kernel version
-existing_entry=$(efibootmgr | grep "Void Linux with kernel ${major_version}")
-
-# get the boot order
-# this is required because when in the next step the existing entry is removed,
-# it is also removed from the order so it needs to be restored later
-bootorder=$(efibootmgr |grep "BootOrder: " |cut -c 12-)
-
-# if existing, remove it
-if [ "$existing_entry" != "" ]; then
-  /etc/kernel.d/post-remove/50-efibootmgr $PKGNAME
+if [ -e "$EFI/initramfs-A.img" ]
+then
+	mv "$EFI/initramfs-A.img" "$EFI/initramfs-B.img"
 fi
 
-# create the new entry
-efibootmgr -qc $args -L "Void Linux with kernel ${major_version}" -l /vmlinuz-${VERSION} -u "${OPTIONS}"
-
-# restore the boot order
-efibootmgr -qo $bootorder
+# copy new kernel and initramfs to vmlinuz-A.efi and initramfs-A.img
+cp -f "${ROOTDIR}/boot/vmlinuz-$VERSION" "$EFI/vmlinuz-A.efi"
+cp -f "${ROOTDIR}/boot/initramfs-$VERSION.img" "$EFI/initramfs-A.img"

srcpkgs/efibootmgr/template

@@ -1,7 +1,7 @@
 # Template file for 'efibootmgr'
 pkgname=efibootmgr
 version=18
-revision=1
+revision=2
 hostmakedepends="pkg-config"
 makedepends="libefivar-devel popt-devel"
 short_desc="Tool to modify UEFI Firmware Boot Manager Variables"