switch to ssh commit signing

hosts/potatobook-g/configuration.nix

@@ -53,7 +53,6 @@
       evremap.enable = true;
     };
     terminal.enable = true;
-    git.signingKey = "08F0 E7C9 6941 84C2 D514 7F31 5621 290C A02C 7BD8";
   };
 
   fileSystems = {

modules/git.nix

@@ -1,12 +1,9 @@
 {
   config,
   lib,
+  pkgs,
   ...
-}: let
-  cfg = config.jade.git;
-in {
-  options.jade.git.signingKey = lib.mkOption {type = lib.types.str;};
-  config = {
+}: {
   home-manager.users.jade = {pkgs, ...}: {
     programs.git = {
       enable = true;
@@ -21,9 +18,14 @@ in {
         s = "status";
       };
       signing = {
-          key = cfg.signingKey;
+        key = "${pkgs.writeText "red_nk3.pub" "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOaE8TFsIazpn4OnHvHcRpOFr9FfvMaWOiEjmHsmnAoE cardno:000F_70CD7D05"}";
         signByDefault = true;
       };
+      extraConfig = {
+        gpg = {
+          format = "ssh";
+        };
+      };
     };
     programs.gitui = {
       enable = true;
@@ -62,5 +64,4 @@ in {
       '';
     };
   };
-  };
 }