Launch a terminal at boot in the live ISO.

The ISO is immutable so garbage collection does not make sense.

nix/configuration/configuration.nix

@@ -103,7 +103,7 @@
     };
 
   # Automatic garbage collection
-  nix.gc = {
+  nix.gc = lib.mkIf (!config.me.buildingIso) {
     # Runs nix-collect-garbage --delete-older-than 5d
     automatic = true;
     randomizedDelaySec = "14m";
@@ -136,9 +136,6 @@
     file
     usbutils # for lsusb
     pciutils # for lspci
-    mesa-demos # for glxgears TODO move to better role
-    vulkan-tools # for vkcube TODO move to better role
-    xorg.xeyes # to test which windows are using x11 TODO move to better role
     ripgrep
     strace
     ltrace
@@ -175,7 +172,6 @@
       "/var/lib/nixos" # Contains user information (uids/gids)
       "/var/lib/systemd" # Systemd state directory for random seed, persistent timers, core dumps, persist hardware state like backlight and rfkill
       "/var/log/journal" # Logs, alternatively set `services.journald.storage = "volatile";` to write to /run/log/journal
-      "/etc/zfs/zpool.cache" # Which zpools to import, the root zpool is already imported and does not need this cache file but this captures additional pools. TODO consider setting cachefile=none on main pool.
     ];
     files = [
       "/etc/machine-id" # Systemd unique machine id "otherwise, the system journal may fail to list earlier boots, etc"

nix/configuration/flake.nix

@@ -87,7 +87,8 @@
             // {
               modules = base_x86_64_linux.modules ++ [
                 (nixpkgs + "/nixos/modules/installer/cd-dvd/iso-image.nix")
-                # TODO: maybe?  imports = [ "${modulesPath}/profiles/image-based-appliance.nix" ];
+                # TODO: Figure out how to do image based appliances
+                # (nixpkgs + "/nixos/modules/profiles/image-based-appliance.nix")
                 {
                   isoImage.makeEfiBootable = true;
                   isoImage.makeUsbBootable = true;

nix/configuration/hosts/odo/default.nix

@@ -6,6 +6,7 @@
     ./optimized_build.nix
     ./power_management.nix
     ./screen_brightness.nix
+    ./wifi.nix
   ];
 
   # Generate with `head -c4 /dev/urandom | od -A none -t x4`

nix/configuration/hosts/odo/wifi.nix

@@ -0,0 +1,16 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [ ];
+
+  config = {
+    environment.loginShellInit = lib.mkIf (!config.me.buildingIso) ''
+      doas iw dev wlan0 set power_save off
+    '';
+  };
+}

nix/configuration/roles/graphics/default.nix

@@ -8,5 +8,36 @@
 {
   imports = [ ];
 
-  hardware.graphics.enable = true;
+  options.me.graphicsCardType = lib.mkOption {
+    type = lib.types.nullOr (
+      lib.types.enum [
+        "amd"
+        "intel"
+        "nvidia"
+      ]
+    );
+    default = null;
+    example = "amd";
+    description = "What graphics card type is in the computer.";
+  };
+
+  options.me.graphical = lib.mkOption {
+    type = lib.types.bool;
+    default = false;
+    example = true;
+    description = "Whether we want to install graphical programs.";
+  };
+
+  config = (
+    lib.mkMerge [
+      (lib.mkIf config.me.graphical {
+        environment.systemPackages = with pkgs; [
+          mesa-demos # for glxgears
+          vulkan-tools # for vkcube
+          xorg.xeyes # to test which windows are using x11
+        ];
+        hardware.graphics.enable = true;
+      })
+    ]
+  );
 }

nix/configuration/roles/launch_keyboard/default.nix

@@ -16,7 +16,6 @@
       lxqt.lxqt-policykit # Need a polkit agent to launch the keyboard configurator
     ];
 
-    # TODO: Switch sway to using seatd instead of polkit
     systemd = {
       user.services.lxqt-policykit-agent = {
         description = "lxqt-policykit-agent";

nix/configuration/roles/media/default.nix

@@ -21,26 +21,6 @@ in
 {
   imports = [ ];
 
-  options.me.graphicsCardType = lib.mkOption {
-    type = lib.types.nullOr (
-      lib.types.enum [
-        "amd"
-        "intel"
-        "nvidia"
-      ]
-    );
-    default = null;
-    example = "amd";
-    description = "What graphics card type is in the computer.";
-  };
-
-  options.me.graphical = lib.mkOption {
-    type = lib.types.bool;
-    default = false;
-    example = true;
-    description = "Whether we want to install graphical programs.";
-  };
-
   config = (
     lib.mkMerge [
       {

nix/configuration/roles/sway/default.nix

@@ -258,6 +258,7 @@ in
 {
   imports = [
     ./graphical_session_target.nix
+    ./iso.nix
   ];
 
   options.me.swayIncludes = lib.mkOption {
@@ -383,9 +384,8 @@ in
     services.gvfs.enable = true;
 
     # Auto-launch sway
-    environment.loginShellInit = ''
-      # TODO: This shouldn't be shoe-horned into the sway config
-      doas iw dev wlan0 set power_save off
+    # Run sway as the absolute last command in the login shell init. mkBefore = 500, plain = 1000, mkAfter = 1500
+    environment.loginShellInit = lib.mkOrder 2000 ''
       [ -z "$WAYLAND_DISPLAY" ] && [ -n "$XDG_VTNR" ] && [ "$XDG_VTNR" -eq 1 ] && [ "$(tty)" = "/dev/tty1" ] && exec ${pkgs.systemd}/bin/systemd-cat --identifier=sway sway
     '';
   };

nix/configuration/roles/sway/iso.nix

@@ -0,0 +1,25 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  launch_terminal = pkgs.writeTextFile {
+    name = "launch_terminal.conf";
+    text = ''
+      exec ${pkgs.alacritty}/bin/alacritty
+    '';
+  };
+in
+{
+  imports = [ ];
+
+  config = lib.mkIf (config.me.buildingIso) {
+    # Launch a terminal at boot in the live ISO for when hotkeys don't work.
+    me.swayIncludes = [
+      launch_terminal
+    ];
+  };
+}

nix/configuration/roles/zfs/default.nix

@@ -44,4 +44,11 @@ in
     zfs_clone_recv
     zfs_clone_resume
   ];
+
+  environment.persistence."/persist" = lib.mkIf (!config.me.buildingIso) {
+    hideMounts = true;
+    directories = [
+      "/etc/zfs/zpool.cache" # Which zpools to import, the root zpool is already imported and does not need this cache file but this captures additional pools.
+    ];
+  };
 }