feat(provides): new tty-autologin battery used for vm. #155

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Merged

vic merged 1 commit into main from autologin

Feb 11, 2026

modules/aspects/provides/tty-autologin.nix

-Original file line number
+Diff line change
@@ -0,0 +1,32 @@
+    let
+      description = ''
+        Enables automatic tty login given a username.
+        This battery must be included in a Host aspect.
+           den.aspects.my-laptop.includes = [ (den._.tty-autologin "root") ];
+      '';
+      # From https://discourse.nixos.org/t/autologin-for-single-tty/49427/2
+      tty-autologin-module =
+        username:
+        { pkgs, config, ... }:
+        {
+          systemd.services."getty@tty1" = {
+            overrideStrategy = "asDropin";
+            serviceConfig.ExecStart = [
+              ""
+              "@${pkgs.util-linux}/sbin/agetty agetty --login-program ${config.services.getty.loginProgram} --autologin ${username} --noclear --keep-baud %I 115200,38400,9600 $TERM"
+            ];
+          };
+        };
+      __functor = _self: username: {
+        nixos = tty-autologin-module username;
+      };
+    in
+    {
+      den.provides.tty-autologin = {
+        inherit description __functor;
+      };
+    }

templates/default/README.md

-Original file line number
+Diff line change
@@ Expand Up / @@ -10,10 +10,14 @@ Steps you can follow after cloning this template: @@
     nix flake update den
     ```
-    - Run checks to test everything works.
+    - Edit [modules/hosts.nix](modules/hosts.nix)
+    - Run the VM
+    We recommend to use a VM develop cycle so you can play with the system before applying to your hardware.
+    See [modules/vm.nix](modules/vm.nix)
     ```console
-    nix flake check
+    nix run .#vm
     ```
-    - Edit [modules/hosts.nix](modules/hosts.nix)

templates/default/modules/vm.nix

-Original file line number
+Diff line change
@@ -1,16 +1,24 @@
     # enables `nix run .#vm`. it is very useful to have a VM
     # you can edit your config and launch the VM to test stuff
     # instead of having to reboot each time.
-    { inputs, ... }:
+    { inputs, den, ... }:
     {
+      # USER TODO: remove this tty-autologin used for the VM
+      den.aspects.igloo.includes = [ (den.provides.tty-autologin "tux") ];
       perSystem =
         { pkgs, ... }:
         {
           packages.vm = pkgs.writeShellApplication {
             name = "vm";
-            text = ''
-              ${inputs.self.nixosConfigurations.igloo.config.system.build.vm}/bin/run-igloo-vm "$@"
-            '';
+            text =
+              let
+                host = inputs.self.nixosConfigurations.igloo.config;
+              in
+              ''
+                ${host.system.build.vm}/bin/run-${host.networking.hostName}-vm "$@"
+              '';
           };
         };
     }

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