142 lines
7.0 KiB
Markdown
142 lines
7.0 KiB
Markdown
# nixfiles
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NixOS / nix-darwin / home-manager configuration for all hosts, built from a
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single flake.
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## Hosts
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Defined in the host table in [`flake.nix`](./flake.nix):
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| Configuration | System | Machine |
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| --------------------- | ---------------- | ----------------------------------------------------------------------------------------------------------- |
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| `lyrathorpe-mbp` | `aarch64-linux` | MacBook Pro (Apple Silicon, Asahi) |
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| `lyrathorpe-t400` | `x86_64-linux` | ThinkPad T400 — [install notes](./hosts/T400/README.md) |
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| `lyrathorpe-macpro31` | `x86_64-linux` | Mac Pro 3,1, desktop — [install notes](./hosts/MacPro31/README.md) |
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| `emmathorpe-edaas` | `x86_64-linux` | Work WSL box (NixOS-WSL) |
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| `lyrathorpe-rpi5` | `aarch64-linux` | Raspberry Pi 5 headless server: Docker host + nginx reverse proxy — [install notes](./hosts/RPi5/README.md) |
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| `lyrathorpe-mac` | `aarch64-darwin` | macOS (nix-darwin) |
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Shared layers: `home` (home-manager: shell, git, editor),
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`modules/common-nixos.nix` (all NixOS hosts: fonts, nix-ld, caches),
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`modules/workstation.nix` (physical graphical hosts: audio, thermald,
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earlyoom, fwupd), `modules/laptop.nix` (laptops: Wi-Fi, Bluetooth, power,
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lid), and `modules/ssh.nix` (key-only sshd). The x86 hosts also pull
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`nixos-hardware` profiles.
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## Users
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Identity is data, kept separate from the reusable modules:
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- [`users/registry.nix`](./users/registry.nix) — one entry per user (display
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name, email, supplementary groups, authorized + signing keys). This is the
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single source of identity; no user data is hardcoded in the modules.
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- Each host's table entry declares a `users` set keyed by username; every entry
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lists that user's home-module composition (the shared `./home` bundle plus any
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per-user modules, e.g. [`users/emmathorpe/work.nix`](./users/emmathorpe/work.nix))
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and optional per-host-user system bits such as `linger`.
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- `mkHost` builds each account from the registry and injects the matching
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identity into that user's home config as the `identity` module arg. A host can
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therefore declare any number of users.
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### Portable home (off-NixOS / external consumers)
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The home config is also exposed for use beyond these hosts:
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- `homeConfigurations."<user>@<system>"` — a standalone home-manager profile
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(the portable subset: shell + git + editor + claude) that can be activated on a
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machine this flake does **not** manage:
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`home-manager switch --flake .#"lyrathorpe@x86_64-linux"`. The desktop/sway
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modules are intentionally excluded (they rely on a NixOS-provided Sway/Firefox
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binary).
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- `homeModules` — the reusable modules exported so another flake can import them
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(`inputs.<this>.homeModules.default`). Consumers must supply the module args
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these expect: `inputs` always, `identity` for git/desktop, `portable` for sway.
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## Directory authentication (SSSD → Authentik LDAP)
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Every NixOS host authenticates users against the Authentik LDAP outpost via
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SSSD, implemented in [`modules/sssd.nix`](./modules/sssd.nix) and enabled by
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default through the `services.authentikLdap.enable` option (added to
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`baseModules`). The **EDaaS** WSL box opts out
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(`services.authentikLdap.enable = false`) as a work-managed environment; the
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macOS host is unaffected (SSSD is Linux-only).
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- Connects over LDAPS to `ldap.lyrapup.pet:636`, search base
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`dc=ldap,dc=goauthentik,dc=io`, binding as
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`cn=sssd-bind,ou=users,dc=ldap,dc=goauthentik,dc=io`.
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- The schema mappings match Authentik's non-standard object classes
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(`goauthentik.io/ldap/user`, `goauthentik.io/ldap/group`) over the POSIX
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attributes (`uid`, `uidNumber`, `gidNumber`, `homeDirectory`).
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- Home directories are created on first login (`pam_mkhomedir`).
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### Secrets (agenix)
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The LDAP bind credential is an [agenix](https://github.com/ryantm/agenix)
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secret, decrypted at activation with each host's SSH host key. The decrypted
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plaintext is a full `sssd.conf` drop-in delivered to
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`/etc/sssd/conf.d/01-ldap-authtok.conf`, so the password never enters the Nix
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store. Owner setup (host recipient keys, encrypting the bind password, DNS for
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`ldap.lyrapup.pet`, rebuild) is documented in
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[`secrets/README.md`](./secrets/README.md).
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## Applying
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```sh
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# NixOS
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sudo nixos-rebuild switch --flake .#<configuration>
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# Darwin
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darwin-rebuild switch --flake .#lyrathorpe-mac
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```
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## Shell environment & keybindings
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- Interactive shell features (zsh, tmux, git, ssh, CLI tools, auto-tmux):
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[`home/README.md`](./home/README.md).
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- All Sway / tmux / foot / zsh keyboard shortcuts:
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[`home/KEYBINDINGS.md`](./home/KEYBINDINGS.md).
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## Login / greeter
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Graphical (Sway) hosts log in through a Wayland greeter — `greetd` running
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ReGreet inside the `cage` kiosk compositor — implemented in
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[`modules/sway.nix`](./modules/sway.nix), gated on
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`features.swayDesktop.enable` (the option is declared in
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[`modules/features.nix`](./modules/features.nix), so headless hosts
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can leave it off without importing `modules/sway.nix`). The greeter is forced to Dvorak
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to match the console and Sway session. Headless hosts (the WSL work box and the
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Raspberry Pi server) keep plain TTY login. The target account needs a password
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(`passwd <user>`) before it can log in.
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## MacBook (Asahi) firmware
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The MBP host references `modules/firmware/` for Apple peripheral
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firmware (Wi-Fi/Bluetooth). These blobs are **committed** (tracked) even though
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`.gitignore` lists the directory: the flake is `git+file`, so it only sees
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tracked files — untracking them breaks `lyrathorpe-mbp` evaluation (and the CI
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host-eval) because the config can't find the firmware. They are not
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redistributable; the repo is private.
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To refresh them, copy the firmware extracted during the Asahi install (from
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`/etc/nixos/firmware`, or re-extract per the
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[Asahi NixOS docs](https://github.com/tpwrules/nixos-apple-silicon)) into
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`modules/firmware/` and commit with `git add -f`.
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## Development
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A dev shell and a formatting/lint gate are wired through the flake:
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- `nix develop` — shell with `deadnix`, `statix`, `treefmt`, and the git
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`pre-commit` hooks (installed automatically on first entry).
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- `nix fmt` — formats the tree via `treefmt` (nixfmt + shfmt + prettier;
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generated files and `flake.lock` are excluded).
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- `nix flake check` — runs formatting, `deadnix`, `statix`, the pre-commit
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hooks, and evaluates every host. `.editorconfig` carries the base style;
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`statix.toml` disables the two house-style lints (`repeated_keys`,
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`empty_pattern`).
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## CI
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[`.gitea/workflows/ci.yaml`](./.gitea/workflows/ci.yaml) runs `nix flake check`
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(formatting, `deadnix`, `statix`, the pre-commit hooks) and evaluates every
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NixOS and Darwin host configuration on push/PR.
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