numlock: add module

This adds an option `xsession.numlock` that enable the Num Lock key
when starting a graphical session.

Fixes #651

1 files changed, 34 insertions, 0 deletions

diff --git a/modules/misc/numlock.nix b/modules/misc/numlock.nix
new file mode 100644
index 00000000000..df11f22a780
--- /dev/null
+++ b/modules/misc/numlock.nix
@@ -0,0 +1,34 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.xsession.numlock;
+
+in
+
+{
+  options = {
+    xsession.numlock.enable = mkEnableOption "Num Lock";
+  };
+
+  config = mkIf cfg.enable {
+    systemd.user.services.numlockx = {
+      Unit = {
+        Description = "NumLockX";
+        After = [ "graphical-session-pre.target" ];
+        PartOf = [ "graphical-session.target" ];
+      };
+
+      Service = {
+        Type = "oneshot";
+        ExecStart = "${pkgs.numlockx}/bin/numlockx";
+      };
+
+      Install = {
+        WantedBy = [ "graphical-session.target" ];
+      };
+    };
+  };
+}