alpine: add support for nvram writing

alpine-install-on-disk.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 if [ $# -ne 3 ]; then
-    echo "$0 disk ssh-keyfile [efi|bios]"
+    echo "$0 disk ssh-keyfile [efi|bios|efinvram]"
     echo "   disk: which disk to install to"
     echo "   ssh-keyfile: ssh keys to add into the image"
     echo "   use efi or bios partitioning"
@@ -65,7 +65,7 @@ EOF
         sudo mkfs.ext4 -F ${partition1}
         sudo mount -t ext4 ${partition1} $rootfs_tmpdir
         ;;
-    efi)
+    efi*)
         sudo sfdisk "$DISK" <<EOF
 label: gpt
 ,500MiB,U
@@ -151,7 +151,7 @@ case "$BOOT_VIA" in
         run_root grub-install --target=i386-pc ${DISK}
         echo "UUID=$UUID_1 / ext4 defaults 0 1" >> ${rootfs_tmpdir}/etc/fstab
         ;;
-    efi)
+    efi*)
         eval $(blkid | grep ^${DISK}2 | awk '{ print $2 }')
         UUID_2=$UUID
 
@@ -166,6 +166,15 @@ case "$BOOT_VIA" in
         ;;
 esac
 
+# Actually do add us to the bios
+if [ $BOOT_VIA = "efinvram" ]; then
+    dir=/sys/firmware/efi/efivars/
+    sudo mount --bind ${dir} ${rootfs_tmpdir}${dir}
+    run_root apk add efibootmgr
+    run_root grub-install --efi-directory=/boot
+fi
+
+
 # Debug
 run_root cat /etc/fstab
 
@@ -182,6 +191,3 @@ rmdir ${rootfs_tmpdir}
 echo "${DISK} has been setup with Alpine Linux"
 
 exit 0
-
-apk add grub-efi
-grub-install --no-nvram --efi-directory /boot/