Add doom/describe-{setting,module}

core/autoload/help.el

@@ -0,0 +1,37 @@
+;;; ../core/autoload/help.el
+
+;;;###autoload
+(defun doom/describe-setting (setting)
+  "Open the documentation of SETTING (a keyword defined with `def-setting!')."
+  (interactive
+   ;; TODO try to read setting from whole line
+   (let ((keyword (thing-at-point 'symbol t)))
+     (list (completing-read
+            (format "Describe setting%s: "
+                    (if (equal (substring keyword 0 1) ":")
+                        (format " (default %s)" keyword)
+                      ""))
+            doom-settings
+            nil t nil nil keyword))))
+  (let ((fn (intern-soft (format "doom-setting--setter%s" setting))))
+    (unless fn
+      (error "'%s' is not a valid DOOM setting" setting))
+    (describe-function fn)))
+
+;;;###autoload
+(defun doom/describe-module (module)
+  "Open the documentation of MODULE (a string that represents the category and
+submodule in the format, e.g. ':feature evil')."
+  (interactive
+   ;; TODO try to read module from whole line
+   (list (completing-read "Describe module: "
+                          (mapcar (lambda (x) (format "%s %s" (car x) (cdr x)))
+                                  (reverse (hash-table-keys doom-modules)))
+                          nil t)))
+  (destructuring-bind (category submodule) (mapcar #'intern (split-string module " "))
+    (unless (member (cons category submodule) (doom--module-pairs))
+      (error "'%s' isn't a valid module" module))
+    (let ((doc-path (expand-file-name "README.org" (doom-module-path category submodule))))
+      (unless (file-exists-p doc-path)
+        (error "There is no documentation for this module"))
+      (find-file doc-path))))

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
+  `(progn
+     (defun ,(intern (format "doom-setting--setter%s" keyword)) ,arglist
        ,docstring
-     ,@forms))
+       ,@forms)
+     (cl-pushnew ,keyword doom-settings)))
 
 (defmacro set! (keyword &rest values)
   "Set an option defined by `def-setting!'. Skip if doesn't exist."