messy code deserves a one-liner doc

README.md

@@ -22,3 +22,10 @@
 
 -   [truxnell/dotfiles](https://github.com//truxnell/nix-config/)
 -   [billimek/dotfiles](https://github.com/billimek/dotfiles/)
+
+## Upgrading the borgmatic template for reference
+
+```sh
+borgmatic config generate --source nixos/hosts/shadowfax/config/borgmatic/borgmatic-template.yaml --destination nixos/hosts/shadowfax/config/borgmatic/borgmatic-t
+emplate.yaml  --overwrite
+```

nixos/hosts/shadowfax/config/borgmatic/default.nix

@@ -1,7 +1,9 @@
-{ lib, ... }:
+{lib, ...}:
+# Includes all files with .nix suffix in the current directory except default.nix
 let
   dir = ./.;
-  files = lib.filterAttrs (name: type:
+  files = lib.filterAttrs (
+    name: type:
       type == "regular" && name != "default.nix" && lib.hasSuffix ".nix" name
   ) (builtins.readDir dir);
   imports = map (name: "${dir}/${name}") (builtins.attrNames files);