nixos-config

My NixOS configuration files

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{
  config,
  lib,
  pkgs,
  ...
}:

{
  nix = {
    # BAD NIX STORE STOP BEING 100GB
    gc = {
      automatic = true;
      dates = "weekly";
      options = "--delete-older-than 7d";
    };
    optimise = {
      automatic = true;
      # Not sure why the inconsistency...
      dates = [ "weekly" ];
    };
    # Don't trash my $HOME please like come on it's not 2005 anymore
    settings.use-xdg-base-directories = true;
    # Fancy stuff yay
    # The new CLI is so much better anyways
    # Why oh why is it still "experimental"
    settings.experimental-features = [
      "nix-command"
      "flakes"
      "pipe-operators"
    ];
  };

  # Use a better rebuild tool instead of a Bash script
  system.rebuild.enableNg = true;

  # Instant boot
  boot.loader.timeout = 0;
  # This is what literally every other distro does
  boot.tmp.useTmpfs = true;

  # I NEED ZSTD
  # NixOS is a disk destroyer
  fileSystems = {
    "/".options = [ "compress=zstd" ];
    "/home".options = [ "compress=zstd" ];
    "/var/log".options = [ "compress=zstd" ];
    "/.snapshots".options = [ "compress=zstd" ];
    "/nix".options = [
      "compress=zstd"
      "noatime"
    ];
  };

  # Download more RAM
  zramSwap.enable = true;

  users.users.a = {
    # Am I really that normal?
    isNormalUser = true;
    extraGroups = [ "wheel" ];
    description = "Anthony Wang";
    # I can't bash you know
    shell = pkgs.fish;
    initialPassword = "silly insecure password";
  };

  # Enable the boring stuff
  programs = {
    git.enable = true;
    fish.enable = true;
  };

  # Everyone likes these right?
  environment.systemPackages = with pkgs; [
    btop
    # Apparently hugo is mission-critical software now
    hugo
    micro
  ];

  # It sync things I guess
  services.syncthing = {
    enable = true;
    user = "a";
    group = "users";
    openDefaultPorts = true;
    # The default when running Syncthing normally
    configDir = "/home/a/.local/state/syncthing";
  };

  # THE ONLY CORRECT BACKUP METHOD
  services.btrbk.instances.btrbk = {
    settings = {
      timestamp_format = "short";
      snapshot_dir = "/.snapshots";
      snapshot_preserve = "3d 3w 3m *y";
      snapshot_preserve_min = "latest";
    };
  };
  # Basically equivalent to making the btrbk user root?
  security.sudo.extraRules = [
    {
      users = [ "btrbk" ];
      commands = [
        {
          command = "${pkgs.coreutils}/bin/test";
          options = [ "NOPASSWD" ];
        }
        {
          command = "${pkgs.coreutils}/bin/readlink";
          options = [ "NOPASSWD" ];
        }
        {
          command = "${pkgs.btrfs-progs}/bin/btrfs";
          options = [ "NOPASSWD" ];
        }
      ];
    }
  ];

  # This option defines the first version of NixOS you have installed on this particular machine,
  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
  #
  # Most users should NEVER change this value after the initial install, for any reason,
  # even if you've upgraded your system to a new NixOS release.
  #
  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
  # to actually do that.
  #
  # This value being lower than the current NixOS release does NOT mean your system is
  # out of date, out of support, or vulnerable.
  #
  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
  # and migrated your data accordingly.
  #
  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
  system.stateVersion = "24.11"; # Did you read the comment?

}