From 09513b5c4e4babfaefdd06c592ef34c0908dc572 Mon Sep 17 00:00:00 2001
From: sadbeast <sadbeast@sadbeast.com>
Date: Thu, 30 May 2024 00:47:47 +0000
Subject: oh god what have i done

---
 hosts/wopr/hardware-configuration.nix | 103 ++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 hosts/wopr/hardware-configuration.nix

(limited to 'hosts/wopr/hardware-configuration.nix')

diff --git a/hosts/wopr/hardware-configuration.nix b/hosts/wopr/hardware-configuration.nix
new file mode 100644
index 0000000..02a1988
--- /dev/null
+++ b/hosts/wopr/hardware-configuration.nix
@@ -0,0 +1,103 @@
+{
+  config,
+  lib,
+  pkgs,
+  modulesPath,
+  ...
+}: {
+  imports = [
+    (modulesPath + "/installer/scan/not-detected.nix")
+  ];
+
+  boot.initrd.availableKernelModules = ["ehci_pci" "ahci" "firewire_ohci" "usb_storage" "sd_mod" "sr_mod" "sdhci_pci"];
+  boot.initrd.kernelModules = [];
+  boot.kernelModules = ["kvm-intel"];
+  boot.extraModulePackages = [];
+
+  boot.initrd.luks.devices."enc".device = "/dev/disk/by-uuid/e9671751-99d2-4a1c-84f1-1f58dc117fc1";
+
+  # Note `lib.mkBefore` is used instead of `lib.mkAfter` here.
+  boot.initrd.postDeviceCommands = pkgs.lib.mkBefore ''
+    mkdir -p /mnt
+
+    # We first mount the btrfs root to /mnt
+    # so we can manipulate btrfs subvolumes.
+    mount -o subvol=/ /dev/mapper/enc /mnt
+
+    # While we're tempted to just delete /root and create
+    # a new snapshot from /root-blank, /root is already
+    # populated at this point with a number of subvolumes,
+    # which makes `btrfs subvolume delete` fail.
+    # So, we remove them first.
+    #
+    # /root contains subvolumes:
+    # - /root/var/lib/portables
+    # - /root/var/lib/machines
+    #
+    # I suspect these are related to systemd-nspawn, but
+    # since I don't use it I'm not 100% sure.
+    # Anyhow, deleting these subvolumes hasn't resulted
+    # in any issues so far, except for fairly
+    # benign-looking errors from systemd-tmpfiles.
+    btrfs subvolume list -o /mnt/root |
+    cut -f9 -d' ' |
+    while read subvolume; do
+      echo "deleting /$subvolume subvolume..."
+      btrfs subvolume delete "/mnt/$subvolume"
+    done &&
+    echo "deleting /root subvolume..." &&
+    btrfs subvolume delete /mnt/root
+
+    echo "restoring blank /root subvolume..."
+    btrfs subvolume snapshot /mnt/root-blank /mnt/root
+
+    # Once we're done rolling back to a blank snapshot,
+    # we can unmount /mnt and continue on the boot process.
+    umount /mnt
+  '';
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-label/boot";
+    neededForBoot = true;
+    fsType = "btrfs";
+  };
+
+  fileSystems."/" = {
+    device = "/dev/disk/by-uuid/0ceef315-a8bb-4899-b037-4ad4b6d094a7";
+
+    fsType = "btrfs";
+    options = ["subvol=root" "noatime"];
+  };
+
+  fileSystems."/nix" = {
+    device = "/dev/disk/by-uuid/0ceef315-a8bb-4899-b037-4ad4b6d094a7";
+    fsType = "btrfs";
+    options = ["subvol=nix" "noatime"];
+  };
+
+  fileSystems."/persistent" = {
+    device = "/dev/disk/by-uuid/0ceef315-a8bb-4899-b037-4ad4b6d094a7";
+    fsType = "btrfs";
+    neededForBoot = true;
+    options = ["subvol=persistent" "noatime"];
+  };
+
+  swapDevices = [
+    {device = "/dev/disk/by-label/swap";}
+  ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking = {
+    useDHCP = lib.mkDefault true;
+    wireless = {
+      enable = true;
+      userControlled.enable = true;
+    };
+  };
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}
-- 
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