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|
# USAGE in your configuration.nix.
# Update devices to match your hardware.
# {
# imports = [ ./disko-config.nix ];
# disko.devices.disk.main.device = "/dev/sda";
# disko.devices.disk.main.content.partitions.swap.size = "16G"; # Must be greater than RAM to enable hibernation
# }
{ lib, config, ... }:
{
boot.initrd.postDeviceCommands = ''
mkdir /btrfs_tmp
mount -t btrfs -o subvol=root,defaults ${config.disko.devices.disk.main.device} /btrfs_tmp
if [[ -e /btrfs_tmp/root ]]; then
mkdir -p /btrfs_tmp/old_roots
timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%-d_%H:%M:%S")
mv /btrfs_tmp/root "/btrfs_tmp/old_roots/$timestamp"
fi
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"
}
for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +30); do
delete_subvolume_recursively "$i"
done
btrfs subvolume create /btrfs_tmp/root
umount /btrfs_tmp
'';
disko.devices = {
disk = {
main = {
device = "/dev/sda";
type = "disk";
content = {
type = "gpt";
partitions = {
ESP = {
size = "1G";
type = "EF00";
content = {
type = "filesystem";
format = "vfat";
mountpoint = "/boot";
mountOptions = [ "umask=0077" ];
};
};
swap = {
size = "13G";
content = {
type = "swap";
discardPolicy = "both";
resumeDevice = true;
};
};
data = {
size = "100%";
content = {
type = "btrfs";
extraArgs = [ "-f" ];
mountpoint = "/partition-root";
subvolumes = {
"/nix" = {
mountOptions = [ "compress=zstd" "noatime" ];
mountpoint = "/nix";
};
"/persist" = {
mountpoint = "/persist";
};
"/root" = {
mountpoint = "/";
};
};
};
};
};
};
};
};
};
}
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