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{ pkgs, lib, ... }:
{
boot.initrd.postDeviceCommands = lib.mkAfter ''
mkdir /btrfs_tmp
mount /dev/root_vg/root /btrfs_tmp
delete_subvolume_recursively() {
IFS=$'\n'
for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
delete_subvolume_recursively "/btrfs_tmp/$i"
done
btrfs subvolume delete "$1"
}
delete_subvolume_recursively "/btrfs_tmp/root"
btrfs subvolume create /btrfs_tmp/root
umount /btrfs_tmp
'';
fileSystems."/persist".neededForBoot = true;
environment.persistence."/persist/system" = {
hideMounts = true;
directories = [
"/var/log"
"/var/lib/bluetooth"
"/var/lib/nixos"
"/var/lib/libvirt"
"/var/lib/systemd/coredump"
"/etc/NetworkManager/system-connections"
"/var/lib/docker"
];
files = [
"/etc/machine-id"
{ file = "/var/keys/secret_file"; parentDirectory = { mode = "u=rwx,g=,o="; }; }
];
};
}
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