# Written by hand from the CachyOS install, in the shape nixos-generate-config
# produces. During the install, compare it with the output of
#   nixos-generate-config --show-hardware-config --root /mnt
# and keep the generated one if they differ.
#
# Disk layout: the existing btrfs partition is kept. NixOS gets subvolumes of
# its own (@nixos for /, @nix for /nix, @nixos-log for /var/log) next to
# CachyOS's, and /home is CachyOS's @home, so your files stay where they are.
# See MIGRATION.md.
{
  config,
  lib,
  modulesPath,
  ...
}:
let
  btrfs = "/dev/disk/by-uuid/6e57f546-3dd3-43f6-9d1b-1c57f3b489ad";
  subvol = name: [
    "subvol=${name}"
    "noatime"
    "compress=zstd"
  ];
in
{
  imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];

  boot.initrd.availableKernelModules = [
    "nvme"
    "xhci_pci"
    "ahci"
    "usbhid"
    "usb_storage"
    "sd_mod"
  ];
  boot.kernelModules = [ "kvm-amd" ];

  fileSystems."/" = {
    device = btrfs;
    fsType = "btrfs";
    options = subvol "@nixos";
  };
  fileSystems."/nix" = {
    device = btrfs;
    fsType = "btrfs";
    options = subvol "@nix";
  };
  fileSystems."/var/log" = {
    device = btrfs;
    fsType = "btrfs";
    options = subvol "@nixos-log";
    neededForBoot = true;
  };
  fileSystems."/home" = {
    device = btrfs;
    fsType = "btrfs";
    options = subvol "@home";
  };
  fileSystems."/boot" = {
    device = "/dev/disk/by-uuid/DDCE-5209";
    fsType = "vfat";
    options = [
      "fmask=0077"
      "dmask=0077"
    ];
  };

  # The second drive (sdb, ext4) was commented out in CachyOS's fstab too.
  # fileSystems."/home/vizie/Games" = {
  #   device = "/dev/disk/by-uuid/deadbeef-b2a7-406c-9704-4d07e2f38996";
  #   fsType = "ext4";
  # };

  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
}