09c308b93c
Nomarchy roots are BTRFS, never ZFS, but the zfs module's `true` default for
forceImportRoot emits a warning on every eval/build ("recommended to set it
to false, the new default from 26.11"). Adopt that default early via
mkDefault — silences the noise, future-proofs for 26.11, and a real ZFS-root
downstream can still force it back on.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
358 lines
17 KiB
Nix
358 lines
17 KiB
Nix
# Nomarchy — reusable system layer (NixOS 26.05).
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#
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# This module is the distro: import it from any host (see
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# nixosModules.nomarchy in flake.nix) and layer your machine specifics
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# (bootloader, hostname, users, hardware) on top. Host concerns are
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# deliberately NOT set here. Everything user-facing (Hyprland config,
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# Waybar, Ghostty, theming) lives in modules/home.
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{ config, lib, pkgs, ... }:
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let
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cfg = config.nomarchy.system;
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# Reused by the greeter banner and MOTD so the brand name lives in one
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# place (system.nixos.distroName, set below).
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distroName = config.system.nixos.distroName;
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# The Nomarchy glyph font: a single-glyph face (the logo at U+F000) used
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# by the Waybar menu button in the summer themes. Pinned via
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# `font-family: Nomarchy` in their CSS, since Nerd Fonts also occupy
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# U+F000 (a glass icon) and would otherwise win.
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nomarchyLogoFont = pkgs.runCommandLocal "nomarchy-logo-font" { } ''
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install -Dm444 ${./branding/Nomarchy.ttf} $out/share/fonts/truetype/Nomarchy.ttf
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'';
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in
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{
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imports = [ ./options.nix ./plymouth.nix ./file-manager.nix ./power.nix ./services.nix ./hardware.nix ];
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config = {
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# The safe half of distro branding: distroName flows into
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# /etc/os-release PRETTY_NAME, systemd-boot entry titles and the
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# ISO boot-menu label. distroId stays "nixos" on purpose — it feeds
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# DEFAULT_HOSTNAME and upstream isNixos checks (see roadmap).
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system.nixos.distroName = lib.mkDefault "Nomarchy";
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# MOTD on TTY/SSH login (the desktop auto-logs into Hyprland, so this
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# is mostly seen over SSH or on a bare console). Branded, and doubles
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# as a cheat sheet for the distro's own helpers.
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users.motd = lib.mkDefault ''
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${distroName} — a NixOS desktop, themed from one JSON.
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sys-update update inputs + rebuild the system
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home-update apply home/theme changes (no sudo)
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nomarchy-theme-sync apply <theme> switch the whole palette
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SUPER+? keybindings cheatsheet
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'';
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# Unfree allowed distro-wide: pragmatic-desktop territory (vendor
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# GPU/wifi drivers, firmware, fonts, …). The custom nixpkgs-config
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# type can't carry a nested mkDefault; disagree with
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# `nixpkgs.config = lib.mkForce { allowUnfree = false; }`.
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nixpkgs.config.allowUnfree = true;
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# ── One keyboard layout everywhere, incl. the LUKS prompt ────────
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# services.xserver.xkb.layout is the single source of truth for the
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# layout (the installer writes it; downstream sets it in system.nix).
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# These bridge that one knob through to the encrypted-disk prompt —
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# without them, setting only xkb.layout moves the graphical session
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# but leaves the console keymap unset, so the initrd LUKS passphrase
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# prompt falls back to US:
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# useXkbConfig the virtual-console keymap follows xkb (TTYs)
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# earlySetup bakes that keymap into the initrd
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# systemd initrd loads it before cryptsetup asks for the passphrase
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# (the legacy scripted initrd cannot; also what
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# Plymouth needs — defaulted here so it no longer
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# hinges on the splash being enabled).
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# All mkDefault, so an explicit console.keyMap or a scripted initrd
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# still wins.
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console.useXkbConfig = lib.mkDefault true;
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console.earlySetup = lib.mkDefault true;
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boot.initrd.systemd.enable = lib.mkDefault true;
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# Nomarchy roots are BTRFS, not ZFS, so adopt the 26.11 default early and
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# silence the eval warning the old `true` default emits. mkDefault, so a
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# genuine ZFS-root downstream can still force it back on.
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boot.zfs.forceImportRoot = lib.mkDefault false;
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# ── Wayland session: Hyprland ────────────────────────────────────
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# Installs the binary, registers the session, wires up
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# xdg-desktop-portal-hyprland. Configuration is Home Manager's job.
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programs.hyprland.enable = lib.mkDefault true;
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xdg.portal = {
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enable = lib.mkDefault true;
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extraPortals = [ pkgs.xdg-desktop-portal-gtk ]; # file pickers, etc.
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};
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services.greetd = lib.mkIf cfg.greeter.enable {
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enable = lib.mkDefault true;
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settings = {
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default_session = {
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# start-hyprland is Hyprland 0.55's watchdog launcher; running
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# the bare binary makes every session print a warning.
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command = lib.mkDefault "${pkgs.tuigreet}/bin/tuigreet --time --remember --greeting 'Welcome to ${distroName}' --cmd start-hyprland";
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user = "greeter";
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};
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# Boot straight into the session once; logout → normal greeter.
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initial_session = lib.mkIf (cfg.greeter.autoLogin != null) {
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command = "start-hyprland";
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user = cfg.greeter.autoLogin;
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};
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};
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};
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# ── Audio: Pipewire ──────────────────────────────────────────────
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security.rtkit.enable = lib.mkDefault cfg.audio.enable;
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services.pulseaudio.enable = lib.mkDefault false;
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services.pipewire = lib.mkIf cfg.audio.enable {
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enable = lib.mkDefault true;
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alsa.enable = true;
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alsa.support32Bit = true;
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pulse.enable = true;
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wireplumber.enable = true;
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};
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# ── Desktop services ─────────────────────────────────────────────
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security.polkit.enable = lib.mkDefault true;
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services.gnome.gnome-keyring.enable = lib.mkDefault true;
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services.dbus.enable = lib.mkDefault true;
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services.upower.enable = lib.mkDefault true;
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# Firmware updates via LVFS. Ships the daemon + its metadata-refresh
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# timer only — it never flashes anything on its own; applying an update
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# is an explicit `fwupdmgr update`. On by default as desktop security
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# hygiene (BIOS/UEFI/Thunderbolt/SSD fixes land here); a clean no-op
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# where LVFS sees no devices (VMs/headless). Disable natively with
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# `services.fwupd.enable = false`.
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services.fwupd.enable = lib.mkDefault true;
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networking.networkmanager.enable = lib.mkDefault true;
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# No double-unlock on hibernate. Locking the session before sleep is
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# right for suspend (resumes from RAM, no other gate), but an encrypted
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# hibernate already resumes through the LUKS passphrase — a hyprlock on
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# top is a second password. And we can't just drop the lock after the
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# resume: a Wayland session-lock whose client dies without releasing
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# trips hyprlock's "go to a tty" crash failsafe (the compositor keeps the
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# screen locked for safety). So don't lock before an encrypted hibernate
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# in the first place. hypridle can't tell suspend from hibernate, hence a
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# system unit hooked to the sleep targets: it locks on the RAM-resume
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# sleeps always, and on hibernate only when the disk is unencrypted (no
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# LUKS gate to rely on). Replaces hypridle's old before_sleep_cmd.
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systemd.services.nomarchy-lock-before-sleep =
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let
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encrypted = builtins.attrNames config.boot.initrd.luks.devices != [ ];
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# Sleeps whose normal resume is from RAM — always lock these.
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ramTargets = [ "suspend.target" "hybrid-sleep.target" "suspend-then-hibernate.target" ];
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ramServices = [ "systemd-suspend.service" "systemd-hybrid-sleep.service" "systemd-suspend-then-hibernate.service" ];
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in
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{
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description = "Lock the session before sleep (skipped for an encrypted hibernate)";
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before = ramServices ++ lib.optional (!encrypted) "systemd-hibernate.service";
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wantedBy = ramTargets ++ lib.optional (!encrypted) "hibernate.target";
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serviceConfig = {
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Type = "oneshot";
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# Plural: a system unit has no session of its own to lock.
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ExecStart = "${config.systemd.package}/bin/loginctl lock-sessions";
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};
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};
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# zsh as the default login shell (the desktop's shell experience —
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# starship/bat/eza/zoxide — is configured home-side in shell.nix).
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# programs.zsh.enable wires /etc/zshrc, completion and /etc/shells;
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# defaultUserShell applies to normal users that don't set their own.
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programs.zsh.enable = lib.mkDefault true;
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# mkOverride 500: beats nixpkgs' bash.nix `mkDefault bashInteractive`
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# (equal mkDefault priority would conflict) while staying below a
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# plain downstream assignment. A per-user `users.users.<n>.shell`
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# overrides this regardless.
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users.defaultUserShell = lib.mkOverride 500 pkgs.zsh;
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hardware.bluetooth.enable = lib.mkDefault cfg.bluetooth.enable;
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services.blueman.enable = lib.mkDefault cfg.bluetooth.enable;
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# ── Foreign binaries: nix-ld ─────────────────────────────────────
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# An ld.so shim so dynamically-linked binaries not built for NixOS
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# (downloaded tools, language servers, pip/npm-installed ELFs, the
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# npx-fetched claude-code) run without manual patchelf. On by default —
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# a pragmatic-desktop expectation.
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programs.nix-ld.enable = lib.mkDefault true;
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# ── Firmware ─────────────────────────────────────────────────────
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# Blobs for in-kernel drivers: wifi (iwlwifi/ath/rtw/brcm), SOF
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# audio, Bluetooth. Drivers ship with the kernel, but without these
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# a real machine can boot with no wifi — QEMU never catches it.
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# nixos-generate-config also keys CPU microcode off this flag.
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hardware.enableRedistributableFirmware = lib.mkDefault true;
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# ── BTRFS timeline snapshots (ported from the previous iteration) ─
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# Guarded on the actual filesystem so enabling it on an ext4 machine
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# is a clean no-op rather than a failing timer.
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services.snapper.configs = lib.mkIf
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(cfg.snapper.enable && (config.fileSystems."/".fsType or "") == "btrfs")
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({
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root = {
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SUBVOLUME = "/";
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TIMELINE_CREATE = true;
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TIMELINE_CLEANUP = true;
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TIMELINE_LIMIT_HOURLY = "5";
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TIMELINE_LIMIT_DAILY = "7";
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TIMELINE_LIMIT_WEEKLY = "0";
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TIMELINE_LIMIT_MONTHLY = "0";
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TIMELINE_LIMIT_YEARLY = "0";
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};
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}
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# /home is user data — snapshot it too when it's its own BTRFS subvolume
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# (the installer's @home). Keep the recent hourlies for oops-recovery
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# plus dailies, and a month of weeklies; "at least daily" by default.
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// lib.optionalAttrs ((config.fileSystems."/home".fsType or "") == "btrfs") {
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home = {
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SUBVOLUME = "/home";
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TIMELINE_CREATE = true;
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TIMELINE_CLEANUP = true;
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TIMELINE_LIMIT_HOURLY = "5";
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TIMELINE_LIMIT_DAILY = "7";
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TIMELINE_LIMIT_WEEKLY = "4";
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TIMELINE_LIMIT_MONTHLY = "0";
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TIMELINE_LIMIT_YEARLY = "0";
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};
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});
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# snapper needs a `.snapshots` subvolume inside each tracked subvolume.
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# The installer made one for / (@snapshots → /.snapshots) but not /home,
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# so create a nested one there if missing (idempotent via the condition;
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# excluded from /home snapshots since BTRFS snapshots are non-recursive).
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# Runs at boot so it also fixes already-installed machines — no disko
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# change needed.
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systemd.services.nomarchy-home-snapshots-subvol = lib.mkIf
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(cfg.snapper.enable && (config.fileSystems."/home".fsType or "") == "btrfs") {
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description = "Create /home/.snapshots for snapper if missing";
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wantedBy = [ "multi-user.target" ];
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before = [ "snapper-timeline.service" "snapper-cleanup.service" ];
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unitConfig.ConditionPathExists = "!/home/.snapshots";
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serviceConfig = {
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Type = "oneshot";
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ExecStart = "${pkgs.btrfs-progs}/bin/btrfs subvolume create /home/.snapshots";
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};
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};
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# ── Fonts ────────────────────────────────────────────────────────
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# The ten most popular Nerd Fonts ship by default, so any of them
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# can be named in the theme state's fonts.mono and actually resolve
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# (nomarchy-theme-sync warns when a configured font is missing).
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fonts = {
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packages = with pkgs; [
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nerd-fonts.jetbrains-mono
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nerd-fonts.fira-code
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nerd-fonts.caskaydia-cove
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nerd-fonts.hack
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nerd-fonts.sauce-code-pro
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nerd-fonts.meslo-lg
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nerd-fonts.roboto-mono
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nerd-fonts.ubuntu-mono
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# iosevka would be next by popularity, but its package is 1.1 GB
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# (every weight × variant) — too heavy for the ISO and closures.
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nerd-fonts.mononoki
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nerd-fonts.inconsolata
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inter
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noto-fonts
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noto-fonts-color-emoji
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# The legacy-ported waybar identities (summer-day/night) use
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# FontAwesome codepoints in their layouts and list it in css.
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font-awesome
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# The Nomarchy logo glyph (U+F000) for the summer menu button.
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nomarchyLogoFont
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];
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fontconfig.defaultFonts = {
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monospace = lib.mkDefault [ "JetBrainsMono Nerd Font" ];
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sansSerif = lib.mkDefault [ "Inter" ];
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emoji = lib.mkDefault [ "Noto Color Emoji" ];
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};
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};
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# ── Essential packages ───────────────────────────────────────────
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environment.systemPackages = with pkgs; [
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nomarchy-theme-sync # provided by overlays.default
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# Friendly wrappers for the two rebuild paths (README §3). Run as
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# your user: `nix flake update` must NOT run as root (libgit2
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# refuses the user-owned flake repo) — sudo happens inside, only
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# for the system switch.
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(pkgs.writeShellScriptBin "sys-update" ''
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set -e
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if [ "$(id -u)" -eq 0 ]; then
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echo "sys-update: run as your normal user (it sudos the rebuild itself)" >&2
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exit 1
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fi
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flake="''${NOMARCHY_PATH:-$HOME/.nomarchy}"
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echo "sys-update: updating flake inputs in $flake"
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nix flake update --flake "$flake"
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if command -v nixos-rebuild-snap >/dev/null 2>&1; then
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sudo nixos-rebuild-snap "$@" # BTRFS snapshot first
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else
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sudo nixos-rebuild switch --flake "$flake#default" "$@"
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fi
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'')
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(pkgs.writeShellScriptBin "home-update" ''
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set -e
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exec home-manager switch --flake "''${NOMARCHY_PATH:-$HOME/.nomarchy}" "$@"
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'')
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git
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vim
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wget
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curl
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jq
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brightnessctl
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playerctl
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pamixer
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wl-clipboard
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grim
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slurp
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] ++ lib.optional (cfg.snapper.enable && (config.fileSystems."/".fsType or "") == "btrfs")
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# Snapshot, then rebuild — rollback material for system changes
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# (theme changes don't need it; HM generations already roll back).
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(pkgs.writeShellScriptBin "nixos-rebuild-snap" ''
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if [ "$(id -u)" -ne 0 ]; then
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echo "This script must be run as root (use sudo)" >&2
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exit 1
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fi
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echo "Creating pre-rebuild snapshot..."
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${pkgs.snapper}/bin/snapper -c root create \
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-d "Pre-rebuild $(date +'%Y-%m-%d %H:%M:%S')" \
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--cleanup-algorithm number
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echo "Rebuilding..."
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nixos-rebuild switch --flake /etc/nixos#default "$@"
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'')
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# The desktop snapshot manager (browse / diff / restore / rollback over
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# snapper, elevating via polkit) — what `nomarchy-menu snapshot` launches.
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++ lib.optional cfg.snapper.enable pkgs.btrfs-assistant;
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# Don't let boot entries fill the ESP over the years.
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boot.loader.systemd-boot.configurationLimit = lib.mkDefault 10;
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# Backlight udev rule (chgrp video + g+w on /sys/class/backlight) so
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# the desktop's swayosd brightness control works for video-group
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# users without root. Harmless baseline even if the OSD is disabled.
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services.udev.packages = [ pkgs.swayosd ];
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# ── Nix itself ───────────────────────────────────────────────────
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nix = {
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settings = {
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experimental-features = [ "nix-command" "flakes" ];
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auto-optimise-store = lib.mkDefault true;
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# The downstream flake (~/.nomarchy) is meant to be a live working
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# tree: nomarchy-theme-sync rewrites theme-state.json on every
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# switch (and you needn't commit each tweak), so the "Git tree is
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# dirty" warning fires on every rebuild and is pure noise here.
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warn-dirty = lib.mkDefault false;
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};
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gc = {
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automatic = lib.mkDefault true;
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dates = lib.mkDefault "weekly";
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options = lib.mkDefault "--delete-older-than 14d";
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};
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};
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};
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}
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