feat: niri - define configs via home-manager

hosts/12kingdoms-shoukei/home.nix

@@ -1,8 +1,11 @@
-{ config, ... }:
+{ config, niri, ... }:
 let
   hostName = "shoukei"; # Define your hostname.
 in
 {
+  programs.ssh.matchBlocks."github.com".identityFile =
+    "${config.home.homeDirectory}/.ssh/${hostName}";
+
   modules.desktop.hyprland = {
     nvidia = false;
     settings.source = [
@@ -10,6 +13,35 @@ in
     ];
   };
 
-  programs.ssh.matchBlocks."github.com".identityFile =
-    "${config.home.homeDirectory}/.ssh/${hostName}";
+  modules.desktop.niri = {
+    settings =
+      let
+        inherit (niri.lib.kdl)
+          node
+          plain
+          leaf
+          flag
+          ;
+      in
+      [
+        (node "output" "eDP-1" [
+          (leaf "scale" 1.5)
+          (leaf "transform" "normal")
+          (leaf "mode" "2560x1600@60")
+          (leaf "position" {
+            x = 0;
+            y = 0;
+          })
+        ])
+
+        # Settings for debugging. Not meant for normal use.
+        # These can change or stop working at any point with little notice.
+        (plain "debug" [
+          # Override the DRM device that niri will use for all rendering.
+          # Fix: niri fails to correctly detect the primary render device
+          (leaf "render-drm-device" "/dev/dri/renderD128")
+        ])
+      ];
+  };
+
 }

hosts/idols-ai/home.nix

@@ -1,13 +1,68 @@
-{ config, ... }:
+{ config, niri, ... }:
 {
-  modules.desktop = {
-    hyprland = {
-      nvidia = true;
-      settings.source = [
-        "${config.home.homeDirectory}/nix-config/hosts/idols-ai/hypr-hardware.conf"
-      ];
-    };
+  programs.ssh.matchBlocks."github.com".identityFile = "${config.home.homeDirectory}/.ssh/idols-ai";
+
+  modules.desktop.hyprland = {
+    nvidia = true;
+    settings.source = [
+      "${config.home.homeDirectory}/nix-config/hosts/idols-ai/hypr-hardware.conf"
+    ];
   };
 
-  programs.ssh.matchBlocks."github.com".identityFile = "${config.home.homeDirectory}/.ssh/idols-ai";
+  modules.desktop.niri = {
+    settings =
+      let
+        inherit (niri.lib.kdl)
+          node
+          plain
+          leaf
+          flag
+          ;
+      in
+      [
+        # running `niri msg outputs` to find outputs
+        (node "output" "DP-2" [
+          # Uncomment this line to disable this output.
+          # (flag "off")
+
+          # Scale is a floating-point number, but at the moment only integer values work.
+          (leaf "scale" 1.5)
+
+          # Transform allows to rotate the output counter-clockwise, valid values are:
+          # normal, 90, 180, 270, flipped, flipped-90, flipped-180 and flipped-270.
+          (leaf "transform" "normal")
+
+          # Resolution and, optionally, refresh rate of the output.
+          # The format is "<width>x<height>" or "<width>x<height>@<refresh rate>".
+          # If the refresh rate is omitted, niri will pick the highest refresh rate
+          # for the resolution.
+          # If the mode is omitted altogether or is invalid, niri will pick one automatically.
+          # Run `niri msg outputs` while inside a niri instance to list all outputs and their modes.
+          (leaf "mode" "3840x2160@144")
+
+          # Position of the output in the global coordinate space.
+          # This affects directional monitor actions like "focus-monitor-left", and cursor movement.
+          # The cursor can only move between directly adjacent outputs.
+          # Output scale has to be taken into account for positioning:
+          # outputs are sized in logical, or scaled, pixels.
+          # For example, a 3840×2160 output with scale 2.0 will have a logical size of 1920×1080,
+          # so to put another output directly adjacent to it on the right, set its x to 1920.
+          # It the position is unset or results in an overlap, the output is instead placed
+          # automatically.
+          (leaf "position" {
+            x = 0;
+            y = 0;
+          })
+        ])
+        (node "output" "HDMI-A-1" [
+          (leaf "scale" 1.5)
+          (leaf "transform" "normal")
+          (leaf "mode" "3840x2160@60")
+          (leaf "position" {
+            x = 2560; # on the right of DP-2
+            y = 0;
+          })
+        ])
+      ];
+  };
 }