From d0d82cd6a11814b1a59b39154207c7552fac3434 Mon Sep 17 00:00:00 2001
From: Mike Auty <mike.auty@gmail.com>
Date: Thu, 27 Dec 2018 21:43:14 +0000
Subject: [PATCH] Preliminary support for systemd-boot bootloader.

This adds preliminary support for systemd-boot using the kernel-install
tool.  It's dependent upon systemd pull request #11281
(https://github.com/systemd/systemd/pull/11281) to work properly with
initrd files.

It's a little ugly because it wipes (to avoid double copying files) it
wipes out the ones that genkernel has already copied to /boot, since
genkernel copies those in multiple different places in the code.

Ideally those would be refactored and delayed until everything had built
successfully, but that was a large refactoring, so for now this adds
support as is.

Signed-off-by: Mike Auty <mike.auty@gmail.com>
---
 gen_bootloader.sh | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/gen_bootloader.sh b/gen_bootloader.sh
index 28fa2920..aadad60a 100755
--- a/gen_bootloader.sh
+++ b/gen_bootloader.sh
@@ -8,12 +8,36 @@ set_bootloader() {
 		grub2)
 			set_bootloader_grub2
 			;;
+		systemd-boot)
+			set_bootloader_systemd
+			;;
 		*)
 			print_warning "Bootloader ${BOOTLOADER} is not currently supported"
 			;;
 	esac
 }
 
+set_bootloader_systemd() {
+
+	if [[ ! -x `which kernel-install` ]]; then
+		gen_die "Unable to locate kernel-install, is systemd installed?"
+	fi
+
+	# Clear out the mistakenly installed copies, since kernel-install copies its own versions over
+	# We do this first, to prevent people thinking they have enough free space but needing twice the amount
+	KERNEL_IMAGE=$(find_kernel_binary ${KERNEL_BINARY_OVERRIDE:-${KERNEL_BINARY}})
+	rm "${BOOTDIR}/kernel-${KNAME}-${ARCH}-${KV}"
+	INITRD_FILE=""
+	if [[ -f "${BOOTDIR}/initramfs-${KNAME}-${ARCH}-${KV}" ]]; then
+		rm "${BOOTDIR}/initramfs-${KNAME}-${ARCH}-${KV}"
+		INITRD_FILE="${TMPDIR}/initramfs-${KV}"
+	fi
+
+	# Do the call
+	echo "Executing: kernel-install add $KV \"${KERNEL_IMAGE}\" \"${INITRD_FILE}\""
+	kernel-install add $KV "${KERNEL_IMAGE}" "${INITRD_FILE}"
+}
+
 set_bootloader_read_fstab() {
 	local ROOTFS=$(awk 'BEGIN{RS="((#[^\n]*)?\n)"}( $2 == "/" ) { print $1; exit }' /etc/fstab)
 	local BOOTFS=$(awk 'BEGIN{RS="((#[^\n]*)?\n)"}( $2 == "'${BOOTDIR}'") { print $1; exit }' /etc/fstab)