initial tunyon config

devices/tunyon/default.nix

@@ -0,0 +1,108 @@
+{ lib, pkgs, ... }: let
+  disks = {
+    boot = "";
+    crypt = "";
+    root = "";
+  };
+in{
+  imports = [
+    ./options.nix
+    ./impermanece
+  ];
+
+  nixpkgs = {
+    hostPlatform = "x86_64-linux";
+  };
+
+  networking = {
+    hostName = "tunyon";
+  };
+
+  boot = {
+    initrd = {
+      availableKernelModules = [ "nvme" "xhci_pci" "thunderbolt" ];
+      luks.devices.root.device = "/dev/disk/by-uuid/${disks.crypt}";
+      postDeviceCommands = lib.mkAfter ''
+        mkdir /btrfs_tmp
+        mount /dev/disk/by-uuid/${disks.root} /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
+      '';
+    };
+
+    kernelModules = [ "kvm-amd" ];
+    kernelPackages = pkgs.linuxPackages_zen;
+
+    loader = {
+      systemd-boot = {
+        enable = true;
+      };
+      efi.canTouchEfiVariables = true;
+    };
+  };
+
+  fileSystems = {
+    "/boot" = {
+      device = "/dev/disk/by-uuid/${disks.boot}";
+      fsType = "vfat";
+    };
+    "/" = {
+      device = "/dev/disk/by-uuid/${disks.root}";
+      fsType = "btrfs";
+      options = [ "subvol=root" "compress=zstd" "noatime" ];
+    };
+    "/nix" = {
+      device = "/dev/disk/by-uuid/${disks.root}";
+      fsType = "btrfs";
+      options = [ "subvol=nix" "compress=zstd" "noatime" ];
+      neededForBoot = true;
+    };
+    "/persist" = {
+      device = "/dev/disk/by-uuid/${disks.root}";
+      fsType = "btrfs";
+      options = [ "subvol=persist" "compress=zstd" "noatime" ];
+      neededForBoot = true;
+    };
+    "/swap" = {
+      device = "/dev/disk/by-uuid/${disks.root}";
+      fsType = "btrfs";
+      options = [ "subvol=swap" "noatime" ];
+    };
+  };
+  swapDevices = [ { device = "/swap/swapfile"; } ];
+
+  services = {
+    upower.enable = true;
+    fwupd.enable = true;
+    power-profiles-daemon.enable = true;
+  };
+
+  hardware = {
+    enableRedistributableFirmware = true;
+    enableAllFirmware = true;
+    cpu.amd.updateMicrocode = true;
+
+    graphics = {
+      enable = true;
+      enable32Bit = true;
+    };
+  };
+}