I cannot figure out output position

[shaqaruden]

I have had a heck of time trying to figure out how to set position for my displays. I have every combination of values that I could think of that makes sense but nothing returns the proper KDL format. I tried using Google Gemini, Claude, ChatGPT, Kagi Assistant and plain Web Searches all either giving me something I have already tried or something that just plain does not work

I have tried

position = "x=3440 y=0";

position = {
  x = 3440;
  y = 0;
};

position = [ "x=3440" "y=0"];

and some other weird ones that AI gave that are just simply syntactically wrong. I am looking for my main

here is my entire niri config

{
  self,
  inputs,
  ...
}: {
  flake.nixosModules.nixiri = {
    pkgs,
    lib,
    ...
  }: {
    programs.niri = {
      enable = true;
      package = self.packages.${pkgs.stdenv.hostPlatform.system}.nixiri;
    };
  };

  perSystem = {
    pkgs,
    lib,
    self',
    ...
  }: {
    packages.nixiri = inputs.wrapper-modules.wrappers.niri.wrap {
      inherit pkgs;

      settings = {
        spawn-at-startup = [
          (lib.getExe self'.packages.nixtalia)
        ];

        outputs = {
          "DP-7" = {
            focus-at-startup = true;
            variable-refresh-rate = true;
            mode = "3440x1440@175";
            position = "x=0 y=0";
          };
          "DP-5" = {
            position = "x=3440 y=0";
            mode = "2560x1440@165";
          };
        };

        xwayland-satellite.path =
          lib.getExe pkgs.xwayland-satellite;

        input.keyboard = {
          xkb.layout = "us";
        };

        layout.gaps = 5;

        binds = {
          "Super+Return".spawn-sh = lib.getExe pkgs.ghostty;
          "Super+Q".close-window = null;
          "Super+Space".spawn-sh = "${lib.getExe self'.packages.nixtalia} ipc call launcher toggle";
        };
      };
    };
  };
}

[BirdeeHub]

It is done like this (now)

nix-wrapper-modules/wrapperModules/n/niri/check.nix

Lines 75 to 88 in 01cb23e

	outputs = {
	"DP-3" = {
	position = _: {
	props = {
	x = 1440;
	y = 1080;
	};
	};
	background-color = "#003300";
	hot-corners = {
	off = _: { };
	};
	};
	};

^ If that throws an error, update nix-wrapper-modules, I updated that in literally the last commit it used to be just an attrset containing _attrs, but this way with a function is more complete, and implements the whole kdl spec now.

It USED to be done like this

nix-wrapper-modules/wrapperModules/n/niri/check.nix

Lines 75 to 88 in 23b8770

	outputs = {
	"DP-3" = {
	position = {
	_attrs = {
	x = 1440;
	y = 1080;
	};
	};
	background-color = "#003300";
	hot-corners = {
	off = null;
	};
	};
	};

And also you used to include null if you wanted just the node name.

However, null is an actual thing in kdl, written #null

So, now to represent that, you do somename = _: {} instead of somename = null

If you were doing it correctly before, you will get a deprecation warning about this which tells you where they are and what to change.

The reason for the confusion is that in kdl, a node can look like

  f "arg1" "key"="val" {
    g
  }

Or even weirder

  (string)"p" (string)"q" "r"=(string)"s" {
    "t" #null
  }

There is now also a wlib.toKdl so, there is more info about this format in the docs than there was before

https://birdeehub.github.io/nix-wrapper-modules/lib/wlib.html#function-library-wlib.toKdl