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#!/bin/bash -e

[ -f "/etc/dracut-uefi-hook.conf" ] && source /etc/dracut-uefi-hook.conf

ESP_PATH=$(bootctl --print-esp-path)
MACHINE_ID=$(</etc/machine-id)
source <(grep '^BUILD_ID=' /etc/os-release)

kernels=()
dracut_update=0

while read -r line; do
    if [[ $line != 'usr/lib/modules/'+([^/])'/pkgbase' ]]; then
		dracut_update=1 # Dracut files have been updated
        continue 
    fi

    read -r pkgbase < "/${line}"
	kernels+=("${pkgbase}")
done

if (( dracut_update )); then
	kernels=()
	for file in /lib/modules/*/pkgbase; do
		if read -r pkgbase &> /dev/null < "$file"; then
			kernels+=("${pkgbase}")
		fi
	done
fi

for kernel in "${kernels[@]}"; do
	path="$(grep -lE "^${kernel}\$" /usr/lib/modules/*/pkgbase)"
	version=$(basename "${path%/pkgbase}")
    read -r pkgbase < "$path"

	echo "==> Building linux image $kernel ($version)"
	dracut -q -f --uefi --kver "${version}"
	
	if [[ "$pkgbase" == "$default_kernel_package" ]]; then
		echo "===> Mark linux image $kernel ($version) as default"
		bootctl set-default "linux-${version}-${MACHINE_ID}-${BUILD_ID}.efi"
	fi
done