on-kernel-install

#!/bin/bash

red='\033[31m'
colorOff='\033[0m'
cancel() {
        echo -e "$red$1$colorOff"
        exit 1
}

efiDisk="/dev/sda1"
osDisk="/dev/sda2"
efiLabel=$(echo $efiDisk | grep -o '[a-z\/]*')
efiPart=$(echo $efiDisk | grep -o '[0-9]$')
osUuid=$(blkid -s UUID -o value $osDisk)
label="Arch Linux"

mount $efiDisk /efi

cd /boot
load_kernels() {
        initramfs=$(find . -name "*linux*.img" -type f -printf "%P\n")
        vmlinuz=$(find . -name "vmlinuz*" -type f -printf "%P\n")
}
load_kernels
if [ -z "$initramfs" ] || [ -z "$vmlinuz" ]; then
        source /usr/lib/booster/regenerate_images
        load_kernels
fi

ucode=$(find . -name "*-ucode.img" -type f -printf "%P\n")
if [ -z "$ucode" ]; then cancel "ucode missing"; fi

cp -f $ucode /efi
mv -f $initramfs /efi
mv -f $vmlinuz /efi

efibootmgr | pcregrep -o1 "(\d)\* $label" | while read -r bootnum; do
    efibootmgr -b "$bootnum" -B > /dev/null
done

# zswap disabled because using zram only.
efibootmgr --create --disk $efiLabel --part $efiPart --label "$label" --loader /$vmlinuz --unicode "root=UUID=$osUuid rw zswap.enabled=0 initrd=\\$ucode initrd=\\$initramfs"