refactor: add config.host option for host variables

home/hosts/andromache/default.nix

@@ -5,9 +5,6 @@
   ...
 }:
 
-let
-  username = "h";
-in
 {
   imports = [
     ../../modules
@@ -35,8 +32,8 @@ in
 
   home = {
     stateVersion = "25.05";
-    inherit username;
-    homeDirectory = "/home/${username}";
+    username = config.host.username;
+    homeDirectory = "/home/${config.host.username}";
   };
 
   xdg.userDirs.createDirectories = false;

home/hosts/astyanax/default.nix

@@ -4,9 +4,6 @@
   ...
 }:
 
-let
-  username = "h";
-in
 {
   imports = [
     ../../modules
@@ -33,8 +30,8 @@ in
 
   home = {
     stateVersion = "25.05";
-    inherit username;
-    homeDirectory = "/home/${username}";
+    username = config.host.username;
+    homeDirectory = "/home/${config.host.username}";
   };
 
   xdg.userDirs.createDirectories = false;

hosts/andromache/default.nix

@@ -7,8 +7,6 @@
 }:
 
 let
-  username = "h";
-  hostName = "andromache";
   wolInterfaces = import ./wol-interfaces.nix;
 in
 {
@@ -30,7 +28,7 @@ in
     ../../modules/bluetooth
     ../../modules/gaming
     ../../modules/keyboard
-    (import ../../modules/networking { inherit hostName; })
+    (import ../../modules/networking { hostName = config.host.name; })
     ../../modules/users
     ../../modules/audio
     ../../modules/localization
@@ -45,7 +43,12 @@ in
     ../../modules/yubikey
   ];
 
-  home-manager.users.${username} = import ../../home/hosts/andromache {
+  host = {
+    username = "h";
+    name = "andromache";
+  };
+
+  home-manager.users.${config.host.username} = import ../../home/hosts/andromache {
     inherit
       inputs
       config
@@ -54,13 +57,11 @@ in
       ;
   };
 
-  networking.hostName = hostName;
-
-  ssh.username = username;
+  ssh.username = config.host.username;
   ssh.authorizedHosts = [ "astyanax" ];
 
-  secrets.username = username;
-  docker.user = username;
+  secrets.username = config.host.username;
+  docker.user = config.host.username;
 
   nix.settings.secret-key-files = [ config.sops.secrets.nix_signing_key_andromache.path ];
 
@@ -94,7 +95,7 @@ in
 
   my.yubikey = {
     enable = false;
-    inherit username;
+    username = config.host.username;
     keys = [
       {
         handle = "<KeyHandle1>";

hosts/astyanax/default.nix

@@ -6,8 +6,6 @@
   ...
 }:
 let
-  username = "h";
-  hostName = "astyanax";
   wolInterfaces = import ../andromache/wol-interfaces.nix;
 in
 {
@@ -30,7 +28,7 @@ in
     ../../modules/backups
     ../../modules/bluetooth
     ../../modules/keyboard
-    (import ../../modules/networking { inherit hostName; })
+    (import ../../modules/networking { hostName = config.host.name; })
     ../../modules/users
     ../../modules/localization
     ../../modules/fonts
@@ -42,7 +40,12 @@ in
     ../../modules/nfc
   ];
 
-  home-manager.users.${username} = import ../../home/hosts/astyanax {
+  host = {
+    username = "h";
+    name = "astyanax";
+  };
+
+  home-manager.users.${config.host.username} = import ../../home/hosts/astyanax {
     inherit
       inputs
       config
@@ -51,14 +54,12 @@ in
       ;
   };
 
-  networking.hostName = hostName;
-
-  ssh.username = username;
+  ssh.username = config.host.username;
   ssh.authorizedHosts = [ "andromache" ];
 
-  secrets.username = username;
-  docker.user = username;
-  nfc.user = username;
+  secrets.username = config.host.username;
+  docker.user = config.host.username;
+  nfc.user = config.host.username;
   desktop.ly.enable = true;
 
   nix.settings.secret-key-files = [ config.sops.secrets.nix_signing_key_astyanax.path ];

hosts/eetion-02/default.nix

@@ -1,21 +1,23 @@
-{ pkgs, ... }:
+{ pkgs, config, ... }:
 
 # Raspberry Pi 3
 # See <https://nixos.wiki/wiki/NixOS_on_ARM/Raspberry_Pi_3>
 
-let
-  username = "h";
-  hostName = "eetion-02";
-in
 {
   imports = [
     ./hard.nix
     ../../modules/ssh
+    ../../modules/common
   ];
 
+  host = {
+    username = "h";
+    name = "eetion-02";
+  };
+
   ssh = {
-    inherit username;
-    publicHostname = "eetion-02";
+    username = config.host.username;
+    publicHostname = config.host.name;
     authorizedHosts = [
       "andromache"
       "astyanax"
@@ -38,7 +40,7 @@ in
   hardware.enableRedistributableFirmware = true;
 
   networking = {
-    inherit hostName;
+    hostName = config.host.name;
     networkmanager.enable = true;
     firewall = {
       enable = true;
@@ -51,7 +53,7 @@ in
 
   users.users = {
     root.hashedPassword = "!";
-    ${username} = {
+    ${config.host.username} = {
       isNormalUser = true;
       extraGroups = [ "wheel" ];
     };

hosts/eetion/default.nix

@@ -1,22 +1,24 @@
-{ pkgs, ... }:
+{ pkgs, config, ... }:
 
 # Orange Pi Zero2 H616
 # See <https://nixos.wiki/wiki/NixOS_on_ARM/Orange_Pi_Zero2_H616>
 
-let
-  username = "h";
-  hostName = "eetion";
-in
 {
   imports = [
     ./hard.nix
     ../../modules/ssh
+    ../../modules/common
     # ../../modules/uptime-kuma
   ];
 
+  host = {
+    username = "h";
+    name = "eetion";
+  };
+
   ssh = {
-    inherit username;
-    publicHostname = "eetion";
+    username = config.host.username;
+    publicHostname = config.host.name;
     authorizedHosts = [
       "andromache"
       "astyanax"
@@ -29,7 +31,7 @@ in
   };
 
   networking = {
-    inherit hostName;
+    hostName = config.host.name;
     networkmanager.enable = true;
     firewall = {
       enable = true;
@@ -44,7 +46,7 @@ in
 
   users.users = {
     root.hashedPassword = "!";
-    ${username} = {
+    ${config.host.username} = {
       isNormalUser = true;
       extraGroups = [ "wheel" ];
     };
@@ -57,19 +59,19 @@ in
       enable = true;
       passwordFile = "/etc/paperless-admin-pass";
       settings = {
-        PAPERLESS_URL = "http://paperless.eetion";
+        PAPERLESS_URL = "http://paperless.${config.host.name}";
       };
     };
 
     # added (OPNSense) domain override to make this work on LAN
     #
-    # host: eetion
+    # host: <host-name>
     # domain: <domain (e.g. lan)>
-    # ip address: <eetion-ip>
+    # ip address: <host-ip>
     #
     # host: paperless
-    # domain: eetion
-    # ip address: <eetion-ip>
+    # domain: <host-name>
+    # ip address: <host-ip>
     nginx = {
       enable = true;
       recommendedGzipSettings = true;
@@ -78,13 +80,13 @@ in
       recommendedTlsSettings = true;
 
       virtualHosts = {
-        "eetion" = {
+        "${config.host.name}" = {
           default = true;
           locations."/" = {
             proxyPass = "http://127.0.0.1:5006";
           };
         };
-        "paperless.eetion" = {
+        "paperless.${config.host.name}" = {
           locations."/" = {
             proxyPass = "http://127.0.0.1:28981";
           };

hosts/hecuba/default.nix

@@ -1,15 +1,12 @@
 {
   inputs,
   pkgs,
+  config,
   ...
 }:
 
 # Also see <https://wiki.nixos.org/wiki/Install_NixOS_on_Hetzner_Cloud>
 
-let
-  username = "username";
-  hostName = "hecuba";
-in
 {
   imports = [
     inputs.disko.nixosModules.disko
@@ -19,9 +16,14 @@ in
     ../../modules/docker
   ];
 
-  networking.hostName = hostName;
+  host = {
+    username = "username";
+    name = "hecuba";
+  };
+
+  networking.hostName = config.host.name;
   ssh = {
-    inherit username;
+    username = config.host.username;
     publicHostname = "server.hektormisplon.xyz";
     authorizedHosts = [
       "andromache"
@@ -29,7 +31,7 @@ in
     ];
   };
 
-  docker.user = username;
+  docker.user = config.host.username;
 
   fileSystems."/" = {
     device = "/dev/disk/by-label/nixos";
@@ -50,7 +52,7 @@ in
 
   users.users = {
     root.hashedPassword = "!";
-    username = {
+    ${config.host.username} = {
       isNormalUser = true;
       extraGroups = [ "wheel" ];
     };

hosts/vm/default.nix

@@ -5,10 +5,6 @@
   pkgs,
   ...
 }:
-let
-  username = "h";
-  hostName = "vm";
-in
 {
   imports = [
     inputs.disko.nixosModules.disko
@@ -18,7 +14,7 @@ in
     ./disk.nix
     ../../modules/boot/bootloader.nix
     ../../modules/keyboard
-    (import ../../modules/networking { inherit hostName; })
+    (import ../../modules/networking { hostName = config.host.name; })
     ../../modules/users
     ../../modules/audio
     ../../modules/localization
@@ -31,14 +27,19 @@ in
     })
   ];
 
-  home-manager.users.${username} = import ../../home/hosts/vm {
+  host = {
+    username = "h";
+    name = "vm";
+  };
+
+  home-manager.users.${config.host.username} = import ../../home/hosts/vm {
     inherit inputs config pkgs;
   };
 
-  networking.hostName = hostName;
-  ssh.username = username;
+  networking.hostName = config.host.name;
+  ssh.username = config.host.username;
 
-  secrets.username = username;
+  secrets.username = config.host.username;
 
   disko = {
     devices.disk.main = {

modules/common/default.nix

@@ -12,6 +12,7 @@ in
 {
   imports = [
     inputs.home-manager.nixosModules.default
+    ./host.nix
   ];
 
   options.nixpkgs.allowedUnfree = lib.mkOption {

modules/common/host.nix

@@ -0,0 +1,13 @@
+{ lib, ... }:
+
+{
+  options.host = {
+    username = lib.mkOption {
+      type = lib.types.str;
+    };
+
+    name = lib.mkOption {
+      type = lib.types.str;
+    };
+  };
+}