dotfile: new variable dotspacemacs-max-rollback-slots

Replaces the old spacemacs-number-of-rollback-slots

core/core-configuration-layer.el

@@ -67,9 +67,6 @@
 (defconst configuration-layer-rollback-info "rollback-info"
   "Spacemacs rollback information file.")
 
-(defvar spacemacs-number-of-rollback-slots 5
-  "Number of spacemacs rollback slots.")
-
 (defclass cfgl-layer ()
   ((name :initarg :name
          :type symbol
@@ -840,7 +837,7 @@ path."
          (dirs (sort dirattrs
                      (lambda (d e)
                        (time-less-p (nth 6 d) (nth 6 e))))))
-    (dotimes (c (- (length dirs) spacemacs-number-of-rollback-slots))
+    (dotimes (c (- (length dirs) dotspacemacs-max-rollback-slots))
       (delete-directory (concat configuration-layer-rollback-directory
                                 "/" (car (pop dirs)))
                         t t))))

core/core-dotspacemacs.el

@@ -124,6 +124,9 @@ with `:' and Emacs commands are executed with `<leader> :'.")
   "If non nil then name of the default layout as a string to be displayed in
 the mode-line.")
 
+(defvar dotspacemacs-max-rollback-slots 5
+  "Maximum number of rollback slots to keep in the cache.")
+
 (defvar dotspacemacs-use-ido nil
   "If non nil then `ido' replaces `helm' for some commands. For now only
 `find-files' (SPC f f) is replaced.")

core/templates/.spacemacs.template

@@ -120,6 +120,8 @@ values."
    ;; file stored in the cache directory and `nil' to disable auto-saving.
    ;; (default 'cache)
    dotspacemacs-auto-save-file-location 'cache
+   ;; Maximum number of rollback slots to keep in the cache. (default 5)
+   dotspacemacs-max-rollback-slots 5
    ;; If non nil then `ido' replaces `helm' for some commands. For now only
    ;; `find-files' (SPC f f), `find-spacemacs-file' (SPC f e s), and
    ;; `find-contrib-file' (SPC f e c) are replaced. (default nil)