feat: Redirect custom file to cache dir

users/crumb/programs/emacs/modules/syd-custom.el

@@ -0,0 +1,14 @@
+;;; syd-custom.el -*- lexical-binding: t; -*-
+
+;; To discourage use of the custom file, we store it somewhere will
+;; Impermanence will wipe it.
+(use-package emacs
+  ;; TODO: I'd like to allow /some/ custom variables.  E.g., the trusted
+  ;; dir-locals files.  See `hack-dir-local-variables'.  It has some hooks that
+  ;; should make this accomplishable.
+  :custom (custom-file (file-name-concat syd-data-dir "custom.el"))
+  :config
+  (when (file-readable-p custom-file)
+    (load custom-file)))
+
+(provide 'syd-custom)