options to settings

modules/settings/accounts/default.nix

@@ -0,0 +1,49 @@
+{
+  lib,
+  config,
+  ...
+}: let
+  inherit (lib) mkOption types;
+
+  sshKeys = {
+    bunk = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIXCjkKouZrsMoswMIeueO8X/c3kuY3Gb0E9emvkqwUv cnst@cnixpad";
+    sobotka = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICiNcNex+/hrEQJYJJTj89uPXocSfChU38E5TujWdxaM cnstlab@cnixlab";
+    kima = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEUub8vbzUn2f39ILhAJ2QeH8xxLSjiyUuo8xvHGx/VB adam@cnst.dev";
+    toothpc = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGu5vZbb5ExampleKeyHereGfDF9c5 toothpick@toothpc";
+  };
+
+  keyName = config.settings.accounts.sshUser or null;
+
+  selectedKey =
+    if keyName != null
+    then
+      lib.attrByPath [keyName] (
+        builtins.abort "No SSH key defined for hostname/key '${toString keyName}'"
+      )
+      sshKeys
+    else builtins.abort "No accounts.sshUser provided, cannot select SSH key.";
+in {
+  options.settings.accounts = {
+    username = mkOption {
+      type = types.str;
+      default = "cnst";
+      description = "Set the desired username";
+    };
+    mail = mkOption {
+      type = types.str;
+      default = "adam@cnst.dev";
+      description = "Set the desired email";
+    };
+    sshKey = lib.mkOption {
+      type = lib.types.str;
+      default = selectedKey;
+      description = "Host-specific SSH key";
+      readOnly = true;
+    };
+    sshUser = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      description = "Optional override for selecting an SSH key by name";
+    };
+  };
+}