Set up waybar and building ISOs.

nix/configuration/roles/sway/default.nix

@@ -44,6 +44,8 @@ let
       include ${disable-focus-follows-mouse}
       include ${background}
       include ${touchpad_input}
+      include ${waybar}
+      include ${announce_sway_start}
     '';
   };
   base-hotkeys = pkgs.writeTextFile {
@@ -229,6 +231,36 @@ let
       }
     '';
   };
+  waybar = pkgs.writeTextFile {
+    name = "waybar.conf";
+    text = ''
+      #
+      # Status Bar:
+      #
+      # Read `man 5 sway-bar` for more information about this section.
+      bar {
+          position top
+
+          font pango:Cascadia Mono, FontAwesome 10
+          swaybar_command waybar
+
+          colors {
+              statusline #ffffff
+              background #323232
+              inactive_workspace #32323200 #32323200 #5c5c5c
+          }
+      }
+    '';
+  };
+  announce_sway_start = pkgs.writeTextFile {
+    name = "announce_sway_start.conf";
+    text = ''
+      # announce a running sway session to systemd
+      exec systemctl --user import-environment XDG_SESSION_TYPE XDG_CURRENT_DESKTOP
+      exec dbus-update-activation-environment --systemd WAYLAND_DISPLAY XDG_CURRENT_DESKTOP=sway
+    '';
+  };
+
   start_screen_share = pkgs.writeShellScriptBin "start_screen_share" ''
     # Disable displaying notifications. This is useful for video conference screen sharing.
     set -euo pipefail
@@ -261,23 +293,37 @@ in
     stop_screen_share
   ];
 
-  environment.sessionVariables = {
-    # WLR_RENDERER_ALLOW_SOFTWARE = "1";
-    WLR_RENDERER = "vulkan";
-  };
+  # Probably would be cleaner to use environment.sessionVariables but programs.sway.extraSessionCommands is sway-specific.
+  programs.sway.extraSessionCommands =
+    if config.me.buildingIso then
+      ''
+        export WLR_RENDERER_ALLOW_SOFTWARE=1;
+      ''
+    else
+      ''
+        export WLR_RENDERER=vulkan
+      '';
 
   programs.sway = {
     enable = true;
     wrapperFeatures.gtk = true;
-    extraOptions = [
-      "--debug"
-      "--config"
-      "${sway-config}"
-      # "--unsupported-gpu"
-    ];
+    extraOptions =
+      if config.me.buildingIso then
+        [
+          "--debug"
+          "--config"
+          "${sway-config}"
+          "--unsupported-gpu"
+        ]
+      else
+        [
+          "--debug"
+          "--config"
+          "${sway-config}"
+        ];
   };
 
-  environment.persistence."/state" = {
+  environment.persistence."/state" = lib.mkIf (!config.me.buildingIso) {
     hideMounts = true;
     users.talexander = {
       files = [
@@ -293,6 +339,20 @@ in
         xdg-desktop-portal-wlr
         xdg-desktop-portal-gtk
       ];
+      wlr = {
+        enable = true;
+        settings = {
+          # uninteresting for this problem, for completeness only
+          screencast = {
+            # output_name = "eDP-1";
+            max_fps = 30;
+            exec_before = "${start_screen_share}";
+            exec_after = "${stop_screen_share}";
+            chooser_type = "simple";
+            chooser_cmd = "${pkgs.slurp}/bin/slurp -f %o -or";
+          };
+        };
+      };
     };
   };
 }