feat(tazjin/nixos): setup niri (scrolling window manager) r/8626

This commit is experimental for now.

The backstory is this: There are use-cases where tiling windows (as in EXWM,
which I normally use) annoy me. There are also use-cases where stacking
windows (as in e.g. XFCE, which I tried for a bit) are annoying.

Scrolling WMs are a new thing which is sort of similar to tiling, but as it adds
more screen real estate doesn't require shuffling around or resizing of existing
windows basically ever.

I'm going to trial this (assuming I can get everything that's relevant for me
set up) and see how it goes.

Change-Id: I603c87b8ebd7fbde763d9d4708e098e9079889c5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12402
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 25 insertions, 21 deletions

diff --git a/users/tazjin/nixos/modules/desktop.nix b/users/tazjin/nixos/modules/desktop.nix
index 296960a44345..22bec1c7d501 100644
--- a/users/tazjin/nixos/modules/desktop.nix
+++ b/users/tazjin/nixos/modules/desktop.nix
@@ -10,7 +10,6 @@
       pulse.enable = true;
     };
 
-    redshift.enable = true;
     blueman.enable = true;
     libinput.enable = true;
 
@@ -19,34 +18,39 @@
       xkb.layout = "us";
       xkb.options = "caps:super";
 
-      displayManager = {
-        # Give EXWM permission to control the session.
-        sessionCommands = "${pkgs.xorg.xhost}/bin/xhost +SI:localuser:$USER";
-        lightdm.enable = true;
-        # lightdm.greeters.gtk.clock-format = "%H:%M"; # TODO(tazjin): TZ?
+      displayManager.sessionPackages = [ pkgs.niri ];
+      displayManager.gdm = {
+        enable = true;
+        wayland = true;
       };
-
-      windowManager.session = lib.singleton {
-        name = "exwm";
-        start = "${config.tazjin.emacs}/bin/tazjins-emacs --internal-border=0 --border-width=0";
-      };
-      desktopManager.xfce.enable = true;
     };
   };
 
-  # Set variables to enable EXWM-XIM and other Emacs features.
-  environment.sessionVariables = {
-    XMODIFIERS = "@im=exwm-xim";
-    GTK_IM_MODULE = "xim";
-    QT_IM_MODULE = "xim";
-    CLUTTER_IM_MODULE = "xim";
-    EDITOR = "emacsclient";
-    _JAVA_AWT_WM_NONREPARENTING = "1";
-  };
+  programs.xwayland.enable = true;
+
+  environment.systemPackages = with pkgs; [
+    # core packages
+    niri
+    xwayland-satellite
+    swaylock
+
+    # support tooling
+    qt5.qtwayland
+    sfwbar
+    swaybg
+    swayidle
+    wdisplays
+    wezterm
+    wl-mirror
+    xfce.xfce4-appfinder
+  ];
 
   # Do not restart the display manager automatically
   systemd.services.display-manager.restartIfChanged = lib.mkForce false;
 
+  # swaylock needs an empty PAM configuration, otherwise it locks the user out
+  security.pam.services.swaylock = { };
+
   # If something needs more than 10s to stop it should probably be
   # killed.
   systemd.extraConfig = ''