liminix/modules/zyxel-dual-image/service.nix

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{
liminix
, lib
, zyxel-bootconfig
}:
{ ensureActiveImage, primaryMtdPartition, secondaryMtdPartition, bootConfigurationMtdPartition, kernelCommandLineSource }:
let
inherit (liminix.services) oneshot;
activeImageIndex = if ensureActiveImage == "primary" then 0 else 1;
in oneshot {
name = "zyxel-boot-configure";
up = ''
set -- $(cat /proc/device-tree/chosen/bootargs)
for x in "$@"; do
case "$x" in
bootImage=*)
BOOT_IMAGE="''${x#bootImage=}"
echo "Current boot image is $BOOT_IMAGE."
;;
esac
done
if test -z "$BOOT_IMAGE"; then
echo "No valid image was provided in the kernel command line."
exit 1
else
${lib.getExe zyxel-bootconfig} ${bootConfigurationMtdPartition} set-image-status "$BOOT_IMAGE" valid
${lib.getExe zyxel-bootconfig} ${bootConfigurationMtdPartition} set-active-image ${toString activeImageIndex}
echo "Active image is now ${ensureActiveImage}"
fi
'';
}