progress in multi user config

modules/home/shell/toolset/gnupg.nix

@@ -0,0 +1,31 @@
+{ config, options, lib, pkgs, ... }:
+let
+  inherit (builtins) getEnv;
+  inherit (lib.modules) mkIf;
+
+  cfg = config.modules.${user}.shell.toolset.gnupg;
+in
+{
+  options.modules.${user}.shell.toolset.gnupg = let
+    inherit (lib.options) mkEnableOption;
+  in { enable = mkEnableOption "cryptographic suite"; };
+
+  config = mkIf config.modules.shell.toolset.gnupg.enable {
+    environment.variables.GNUPGHOME = "$XDG_CONFIG_HOME/gnupg";
+
+    home-manager.users.${user}.programs.gnupg.agent = {
+      enable = true;
+      enableSSHSupport = true;
+      pinentryPackage = pkgs.pinentry-gnome3;
+
+      settings = let
+        cacheTTL = 86400;
+      in {
+        default-cache-ttl = cacheTTL;
+        default-cache-ttl-ssh = cacheTTL;
+        max-cache-ttl = cacheTTL;
+        max-cache-ttl-ssh = cacheTTL;
+      };
+    };
+  };
+}