write the username into a separate file

flake.nix

@@ -23,6 +23,7 @@
     }:
     let
       system = "x86_64-linux";
+      username = import ./username.nix;
       overlay-unstable = final: prev: {
         unstable = import nixpkgs-unstable {
           system = "x86_64-linux";
@@ -50,7 +51,7 @@
           {
             home-manager.useGlobalPkgs = true;
             home-manager.useUserPackages = true;
-            home-manager.users.andreas = import ./home-manager/desktop.nix
+            home-manager.users.${username} = import ./home-manager/desktop.nix
               {
                 inherit inputs system pkgs;
               };
@@ -67,7 +68,7 @@
           {
             home-manager.useGlobalPkgs = true;
             home-manager.useUserPackages = true;
-            home-manager.users.andreas = import ./home-manager/desktop.nix
+            home-manager.users.${username} = import ./home-manager/desktop.nix
               {
                 inherit inputs system pkgs;
               };
@@ -82,7 +83,7 @@
           {
             home-manager.useGlobalPkgs = true;
             home-manager.useUserPackages = true;
-            home-manager.users.andreas = import ./home-manager/desktop.nix
+            home-manager.users.${username} = import ./home-manager/desktop.nix
               {
                 inherit inputs system pkgs;
               };

home-manager/common.nix

@@ -1,10 +1,12 @@
 { pkgs, ... }:
-
+let
+  username = import ../username.nix;
+in
 {
   # Home Manager needs a bit of information about you and the
   # paths it should manage.
-  home.username = "andreas";
-  home.homeDirectory = "/home/andreas";
+  home.username = username;
+  home.homeDirectory = "/home/${username}";
 
   # This value determines the Home Manager release that your
   # configuration is compatible with. This helps avoid breakage

home-manager/common/default.nix

@@ -1,7 +1,10 @@
 { ... }:
+let
+  username = import ../../username.nix;
+in
 {
   # Home Manager needs a bit of information about you and the
   # paths it should manage.
-  home.username = "andreas";
-  home.homeDirectory = "/home/andreas";
+  home.username = username;
+  home.homeDirectory = "/home/${username}";
 }

home-manager/work-wsl.nix

@@ -1,4 +1,7 @@
 { pkgs, ... }:
+let
+  username = import ../username.nix;
+in
 {
   imports = [
     ./common
@@ -10,7 +13,7 @@
     enable = true;
     bashrcExtra = ''
       . ~/git_repos/nixos/home-manager/work_config/bashrc
-      . /home/andreas/.nix-profile/etc/profile.d/nix.sh
+      . /home/${username}/.nix-profile/etc/profile.d/nix.sh
     '';
   };
 }

modules/common.nix

@@ -1,5 +1,7 @@
 { pkgs, ... }:
-
+let
+  username = import ../username.nix;
+in
 {
   imports = [
     ./cli-packages.nix
@@ -43,7 +45,7 @@
   };
 
   # Define a user account. Don't forget to set a password with ‘passwd’.
-  users.users.andreas = {
+  users.users.${username} = {
     isNormalUser = true;
     initialPassword = "password";
     extraGroups = [

modules/docker.nix

@@ -1,11 +1,14 @@
 { pkgs, ... }:
+let
+  username = import ../username.nix;
+in
 {
   virtualisation.docker =
     {
       enable = true;
       autoPrune.enable = true;
     };
-  users.users.andreas.extraGroups = [ "docker" ];
+  users.users.${username}.extraGroups = [ "docker" ];
   environment.systemPackages = with pkgs; [
     docker-compose
     lazydocker

modules/droidcam/default.nix

@@ -1,4 +1,7 @@
 { pkgs, ... }:
+let
+  username = import ../../username.nix;
+in
 {
   programs.droidcam.enable = true;
   # required for USB connection
@@ -6,7 +9,7 @@
   environment.shellAliases = {
     webcam = "droidcam-cli -size=1920x1080 ios 4747";
   };
-  home-manager.users.andreas = {
+  home-manager.users.${username} = {
     xdg.desktopEntries = {
       droidcam = {
         name = "Droidcam";

modules/home-manager.nix

@@ -3,6 +3,7 @@ let
   system-version = import ../version.nix;
   home-manager-url = "https://github.com/nix-community/home-manager/archive/release-" + system-version + ".tar.gz";
   home-manager = builtins.fetchTarball home-manager-url;
+  username = import ../username.nix;
 in
 {
   imports = [
@@ -10,7 +11,7 @@ in
   ];
 
   home-manager.useGlobalPkgs = true;
-  home-manager.users.andreas = {
+  home-manager.users.${username} = {
     imports = [
       ../home-manager/desktop.nix
     ];

modules/restic/default.nix

@@ -1,13 +1,16 @@
 { ... }:
+let
+  username = import ../../username.nix;
+in
 {
-  services.restic.backups."andreas" = {
-    user = "andreas";
+  services.restic.backups.${username} = {
+    user = username;
     repository = "sftp:borg@10.7.89.117:restic";
     timerConfig.OnCalendar = "hourly";
-    passwordFile = "/home/andreas/git_repos/nixos/secrets/passwords/restic.key";
-    paths = [ "/home/andreas/" ];
+    passwordFile = "/home/${username}/git_repos/nixos/secrets/passwords/restic.key";
+    paths = [ "/home/${username}/" ];
     extraBackupArgs = [
-      "--exclude-file=/home/andreas/git_repos/nixos/modules/restic/excludes.txt"
+      "--exclude-file=/home/${username}/git_repos/nixos/modules/restic/excludes.txt"
     ];
 
   };

modules/xonsh/default.nix

@@ -1,16 +1,23 @@
 { pkgs, ... }:
+let
+  username = import ../../username.nix;
+in
 {
   programs.xonsh = {
     enable = true;
     config = ''
-      aliases['management-server'] = "mosh andreas@10.7.89.106 tmux a"
+      aliases['management-server'] = "mosh ${username}@10.7.89.106 tmux a"
       aliases['nix-generations'] = "sudo nix-env --list-generations --profile /nix/var/nix/profiles/system"
       aliases['rebuild'] = "sudo nixos-rebuild -j auto switch"
       aliases['find-garbage'] = "ls -l /nix/var/nix/gcroots/auto/ | sort"
     '';
   };
-  users.users.andreas = {
+  users.users.${username} = {
     shell = pkgs.xonsh;
   };
+  documentation.man.generateCaches = true;
+  home-manager.users.${username} = {
+    programs.man.generateCaches = true;
+  };
 }
 

username.nix

@@ -0,0 +1 @@
+"andreas"