Add doom/version command

core/autoload/help.el

@@ -113,3 +113,18 @@ in, or d) the module associated with the current major mode (see
         (fill-region (point-min) (point-max)))
       (quiet! (indent-region (point-min) (point-max))))
     (string-trim (buffer-string))))
+
+;;;###autoload
+(defun doom/version ()
+  "Display the current version of Doom & Emacs, including the current Doom
+branch and commit."
+  (interactive)
+  (message "Doom v%s (Emacs v%s). Branch: %s. Commit: %s."
+           doom-version
+           emacs-version
+           (if-let* ((branch (vc-git--symbolic-ref "core/core.el")))
+               branch
+             "n/a")
+           (if-let* ((rev (vc-git-working-revision "core/core.el")))
+               rev
+             "n/a")))