Add doom/describe-{setting,module}

core/core-lib.el

@@ -205,15 +205,19 @@ Body forms can access the hook's arguments through the let-bound variable
 ;; concise, do-what-I-mean front-facing configuration, believe it or not.
 ;;
 ;; Plus, it can benefit from byte-compilation.
+(defvar doom-settings nil)
+
 (defmacro def-setting! (keyword arglist &optional docstring &rest forms)
   "Define a setting macro. Like `defmacro', this should return a form to be
 executed when called with `set!'. FORMS are not evaluated until `set!' calls it."
   (declare (indent defun) (doc-string 3))
   (unless (keywordp keyword)
     (error "Not a valid property name: %s" keyword))
-  `(defun ,(intern (format "doom-setting--setter%s" keyword)) ,arglist
-     ,docstring
-     ,@forms))
+  `(progn
+     (defun ,(intern (format "doom-setting--setter%s" keyword)) ,arglist
+       ,docstring
+       ,@forms)
+     (cl-pushnew ,keyword doom-settings)))
 
 (defmacro set! (keyword &rest values)
   "Set an option defined by `def-setting!'. Skip if doesn't exist."