125 lines
3 KiB
Nix
125 lines
3 KiB
Nix
{
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lib,
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pkgs,
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inputs,
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namespace,
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system,
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target,
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format,
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virtual,
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systems,
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config,
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...
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}:
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with lib;
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with lib.${namespace}; let
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cfg = config.${namespace}.presets.disko.impermanenceBtrfs;
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in {
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options.${namespace}.presets.disko.impermanenceBtrfs = with types; {
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enable = mkBoolOpt false "Enable preset";
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device = mkOpt' str "/dev/nvme0n1";
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swapSize = mkOpt' int 32;
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};
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config = mkIf cfg.enable {
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${namespace}.impermanence = {
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enable = true;
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persistentStorage = "/persist";
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};
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disko.devices = {
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disk.main = {
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inherit (cfg) device;
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type = "disk";
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content = {
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type = "gpt";
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partitions = {
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boot = {
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name = "boot";
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size = "1M";
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type = "EF02";
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};
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esp = {
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name = "ESP";
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size = "500M";
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type = "EF00";
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content = {
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type = "filesystem";
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format = "vfat";
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mountpoint = "/boot";
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};
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};
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swap = {
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size = "${builtins.toString cfg.swapSize}G";
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content = {
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type = "swap";
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resumeDevice = true;
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};
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};
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root = {
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name = "root";
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size = "100%";
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content = {
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type = "lvm_pv";
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vg = "root_vg";
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};
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};
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};
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};
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};
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lvm_vg = {
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root_vg = {
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type = "lvm_vg";
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lvs = {
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root = {
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size = "100%FREE";
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content = {
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type = "btrfs";
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extraArgs = ["-f"];
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subvolumes = {
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"/root" = {
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mountpoint = "/";
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};
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"/persist" = {
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mountOptions = ["subvol=persist" "noatime"];
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mountpoint = "/persist";
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};
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"/nix" = {
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mountOptions = ["subvol=nix" "noatime"];
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mountpoint = "/nix";
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};
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};
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};
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};
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};
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};
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};
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};
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boot.initrd.postDeviceCommands = ''
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mkdir -p /btrfs_tmp
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mount /dev/root_vg/root /btrfs_tmp
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if [[ -e /btrfs_tmp/root ]]; then
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mkdir -p /btrfs_tmp/old_roots
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timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%-d_%H:%M:%S")
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mv /btrfs_tmp/root "/btrfs_tmp/old_roots/$timestamp"
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fi
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delete_subvolume_recursively() {
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IFS=$'\n'
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for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
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delete_subvolume_recursively "/btrfs_tmp/$i"
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done
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btrfs subvolume delete "$1"
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}
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for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +30); do
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delete_subvolume_recursively "$i"
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done
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btrfs subvolume create /btrfs_tmp/root
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umount /btrfs_tmp
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'';
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};
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}
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