hosts/skadhi/fs.nix


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{ flake, flakeInputs, pkgs, config, lib, ... }:
{
  imports = with flake.nixosModules.systemProfiles; [
    disko
  ];

  config = {
    fileSystems."/persistent".neededForBoot = true;
    environment.persistence."/persistent" = {
      hideMounts = true;
      directories = [
        "/nix"
        "/root"
        "/var/log"
        "/var/lib/nixos"
        "/var/lib/sops-nix"
        "/var/lib/systemd"
        config.boot.lanzaboote.pkiBundle
      ];
      timezone = true;
    };

    disko.devices = {
      disk.nvm = {
        type = "disk";
        device = "/dev/nvme0n1";
        content = {
          type = "gpt";
          partitions = {
            ESP = {
              size = "512M";
              type = "EF00";
              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
                mountOptions = [
                  "fmask=0033" "dmask=0022"
                ];
              };
            };
            luks = {
              size = "100%";
              content = {
                type = "luks";
                name = "nvm";
                extraFormatArgs = [
                  "--cipher" "aegis128-random"
                  "--key-size" "128"
                  "--integrity" "aead"
                ];
                content = {
                  type = "btrfs";
                  extraArgs = let
                    subvols = ["/persistent"] ++ map (p: "/persistent/${p}") ["/nix" "/var/log"];
                    restricted = map (p: "/persistent/${p}") ["/root"];
                  in [
                    "--csum" "blake2"
                    "--compress" "zstd:15"
                    "--rootdir" (toString (pkgs.runCommand "rootdir" {
                    } ''
                      mkdir $out
                      install -d ${lib.concatMapStringsSep " " (p: "$out/${p}") subvols}
                      install -m 0700 -d ${lib.concatMapStringsSep " " (p: "$out/${p}") restricted}
                    ''))
                  ] ++ lib.concatMap (p: ["--subvol" p]) (subvols ++ restricted);
                  subvolumes = {
                    "/persistent".mountpoint = "/persistent";
                    "/swap" = {
                      mountpoint = "/.swap";
                      swap.swapfile.size = "96G";
                    };
                  };
                };
              };
            };
          };
        };
      };
    };
  };
}