(setq enable-recursive-minibuffers t)
(minibuffer-depth-indicate-mode 1)
(define-key helm-read-file-map (kbd "C-c c") 'my-helm-make-folder)
(defun my-helm-make-folder (str)
"Make folders from helm save"
(interactive
(list
(read-from-minibuffer "Create folder: "
(minibuffer-contents-no-properties) nil nil nil)))
(make-directory str t)
)You have to enable the minibuffer recursive mode (and I added the recursive counter too) for it to work as it asks you for the creation of the folder.
By removing the /interactive/ arguments and function arguments, it will create the folder directly without asking and you will be able to avoid activating the /minibuffer recursive mode/ (I wonder why it’s not activated by default you can mail me).