Modules/Agenix: Change to system module

system/modules/agenix/default.nix

@@ -0,0 +1,33 @@
+{
+  config,
+  lib,
+  mylib,
+  pkgs,
+  username,
+  publicKeys,
+  ...
+}: let
+  inherit (config.modules) agenix;
+in {
+  options.modules.agenix = import ./options.nix {inherit lib mylib;};
+
+  config = {
+    # NOTE: See the generated secrets.nix file in home/christoph/default.nix
+
+    # Register generated secrets to the age system module
+    age.secrets = let
+      mkSecretIfExists = name:
+      # If this user has already encrypted the secret...
+        if builtins.pathExists ./${name}.age
+        # ...we will register it with age...
+        then {${name}.file = ./${name}.age;}
+        # ...otherwise we link to a bogus file.
+        else {${name}.file = ./void.age;};
+    in
+      lib.mkIf
+      # If this user defined any secrets...
+      (builtins.hasAttr "${username}" agenix.secrets)
+      # ...we will register all secrets files that have already been generated.
+      (lib.mkMerge (builtins.map mkSecretIfExists agenix.secrets.${username}));
+  };
+}