Files
dotfiles/hosts/neogaia/default.nix
alexion e7d7eb14e1 feat: introduce guests as nested-container definitions
Add a third auto-loaded kind beside the host and the module: the guest, a
reusable definition under guests/ that a host enables like a module and that
realizes its interior as a systemd-nspawn nested container.

Split the shared base config so a guest can stand on it.
base.nix now holds the substrate both bases share — the primary user,
home-manager, and the unstable/stable overlays.
system.nix keeps the host-only machinery, and a new guest.nix is the slim
guest-base: it imports the full modules tree, pins the interior release, and
auto-enables the toolkit bundle and SSH so any guest is workable on sight.

Give modules.ssh a guest flavor.
A host restores its host keys from secrets as before, while a guest sets
hostKeys.restore = false, names no sops files, and self-generates a host key,
so it holds no age key of its own.

The lib grows a guest helper that declares the guests.<path> namespace with an
enable and a backend field.
Only the container backend is built; microvm is a reserved value that trips a
clear build-time assertion rather than silently building nothing.

A sample guest exercises the whole path, and neogaia enables it, so the guest
interior builds through the existing nix flake check seam.
2026-07-25 13:19:07 -04:00

61 lines
1.8 KiB
Nix

{
config,
inputs,
pkgs,
...
}:
# neogaia — Dell XPS 13 9380 laptop.
# Disk layout is in ./disk.nix.
# `fileSystems` are derived from it, none declared here.
{
imports = [
inputs.nixos-hardware.nixosModules.dell-xps-13-9380
./hardware-configuration.nix
./disk.nix
];
system.stateVersion = "26.05";
# systemd-boot on the EFI system partition.
boot.loader.systemd-boot.enable = true;
boot.loader.efi.canTouchEfiVariables = true;
boot.kernelPackages = pkgs.linuxPackages_cachyos;
# Redistributable firmware for the QCA6174 wifi (ath10k blobs).
# Intel microcode updates follow from this, so none is declared here.
hardware.enableRedistributableFirmware = true;
# RAM-backed swap, no on-disk swap partition.
zramSwap.enable = true;
# So wifi can be joined from the console.
networking.networkmanager.enable = true;
# So setup can be driven over the network.
# The matching host public keys sit beside this file in plaintext, since
# publishing them is their purpose.
modules.ssh.enable = true;
modules.ssh.hostKeys.sopsFile = ../../secrets/neogaia.yaml;
modules.ssh.userKey.sopsFile = ../../secrets/neogaia.yaml;
# A machine the operator works from, so it admits the workstation keys alone.
modules.ssh.authorizedKeys = config.modules.ssh.workstationKeys;
modules.toolkit.enable = true;
# The walking-skeleton guest, enabled like any module: proves the guest path
# end to end through this host's `nix flake check`.
guests.sample.enable = true;
modules.agents.claude-code.enable = true;
modules.agents.tools.gitea-axi.enable = true;
modules.agents.pi.enable = true;
modules.desktop.enable = true;
modules.desktop.obsidian.enable = true;
time.timeZone = "America/New_York";
i18n.defaultLocale = "en_GB.UTF-8";
}