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nixfiles/hosts/MBP-Asahi/configuration.nix
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lyrathorpeandEmma Thorpe 128deca2e3
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refactor(flake): user registry, multi-user hosts, and portable home outputs (#49)
## Summary

Separates user identity (data) from the reusable Nix modules and lets a host declare any number of users, replacing the previous one-user-per-host structure. Also restructures the tree and exposes the home config for use off these hosts.

## Changes

- **User registry** (`users/registry.nix`): per-user identity (name, email, groups, authorized + signing keys) as the single source of truth; no user data hardcoded in modules.
- **Multi-user `mkHost`**: a host declares a `users` set keyed by username; per-user identity is injected into each home config via the `identity` module arg.
- **Restructured layout**: `users/`, `home/`, `modules/`, `hosts/`, `lib/` replace the former `lyrathorpe/` and `system/` trees.
- **Portable outputs**: standalone `homeConfigurations."<user>@<system>"` (the portable subset — shell, git, editor, claude) plus an exported `homeModules` for use on machines not managed by this flake, or as an input to other flakes.
- Docs (`README.md`, `home/README.md`) and `.gitignore` updated for the new paths.

## Fixes

- Closes #46 — shared user module authorized one user's SSH key for every account.
- Closes #47 — git committer identity hardcoded as defaults instead of per-user.
- Closes #48 — EDaaS systemd linger hardcoded to a literal username.

## Verification

- `nix flake check` passes: treefmt, deadnix, statix, pre-commit, and evaluation of all NixOS hosts + Darwin + homeConfigurations.
- Derivation-path comparison vs `main`: `lyrathorpe-mbp` and `emmathorpe-edaas` are byte-identical; `lyrathorpe-t400`, `lyrathorpe-macpro31` and `lyrathorpe-rpi5` differ only by de-duplicating a repeated `authorized_keys` entry (confirmed with nix-diff — no other change).
- Standalone `homeConfigurations."lyrathorpe@x86_64-linux".activationPackage` builds.

## Notes

- `emmathorpe` has no personal authorized key yet (it previously inherited Lyra's key via the bug in #46); the registry entry is intentionally empty — add a real key if SSH login as `emmathorpe` is wanted (moot on the WSL host).
- A two-repo (public dotfiles / private systems) split is deferred by design; this internal restructure is the prerequisite for it.

---------

Co-authored-by: Emma Thorpe <emma.thorpe@citrix.com>
Reviewed-on: #49
2026-06-29 13:06:23 +01:00

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Nix

# MacBook Pro (Apple Silicon, Asahi NixOS). Shared laptop options live in
# ../../modules/laptop.nix; only host-specific settings are here.
{ pkgs, ... }:
{
imports = [
./hardware-configuration.nix
];
# UEFI boot via systemd-boot. Asahi manages the EFI vars from macOS, so do not
# touch them from NixOS.
boot.loader.systemd-boot.enable = true;
boot.loader.efi.canTouchEfiVariables = false;
networking.hostName = "Lyra-Asahi";
# Audio (PipeWire) and the swaylock PAM stack are inherited from
# workstation.nix. hardware.enableRedistributableFirmware is also set there;
# it is harmless here since Asahi supplies its own peripheral firmware below.
# Binary cache for the Asahi kernel/build artifacts, so the MBP pulls prebuilt
# outputs instead of compiling the Asahi kernel locally.
nix.settings = {
substituters = [ "https://nixos-apple-silicon.cachix.org" ];
trusted-public-keys = [
"nixos-apple-silicon.cachix.org-1:8psDu5SA5dAD7qA0zMy5UT292TxeEPzIz8VVEr2Js20="
];
};
# Apple peripheral firmware (Wi-Fi/Bluetooth). The directory is gitignored and
# populated out-of-band -- see README.
hardware.asahi.peripheralFirmwareDirectory = ../../modules/firmware;
environment.systemPackages = with pkgs; [
asahi-bless
asahi-nvram
asahi-btsync
asahi-wifisync
unzip
ppp
iptables
];
# See `man configuration.nix` / the stateVersion docs before changing.
system.stateVersion = "25.05";
}