vc-checkin (RCS) always. Problem with vc-checkin

[Uwe Brauer]

Hello

The following code can be found in

http://www.emacswiki.org/emacs/VersionControlAlways

(defun ensure-in-vc-or-check-in ()
  "Automatically checkin file ,v can be in the same directory or in the
subdirectory RCS. The idea is  to call that function only for files
not for buffers. See the function ensure-in-vc-or-check-in-modes  
which could be use in an apropriate HOOK."
  (interactive)
  (when (buffer-file-name)   
        (if (or (and (file-exists-p (format "%s,v" (buffer-file-name))))
                        (and (file-exists-p (format "RCS/%s,v" 
(file-name-nondirectory buffer-file-name)))))
  (let ((p (point)))
                (progn
                        (vc-checkin (buffer-file-name) nil "")
                        (vc-toggle-read-only) 
                        (message "Checked in"))
                    (goto-char p))
          (progn
                  (message "You need to check this in! ")))))

I modified the original code
by adding (format "RCS/%s,v" (file-name-nondirectory buffer-file-name)



The point is the code works for a old version of VC, however for GNU
emacs 25
(vc-checkin (buffer-file-name) nil "")

does not work any more.

The docstring for the old function said:
(vc-checkin FILE &optional REV COMMENT INITIAL-CONTENTS)
file for the new function:
(vc-checkin FILES BACKEND &optional COMMENT INITIAL-CONTENTS)
so I thought

(vc-checkin (buffer-file-name) 'RCS nil "")
or
(vc-checkin (buffer-file-name) 'RCS  "")

Should work, it does not. The following error is given
 vc-delistify seems the culprit, but I am stack.


Thanks

Uwe Brauer


--8<---------------cut here---------------start------------->8---

Debugger entered--Lisp error: (wrong-type-argument sequencep 47)
  mapconcat(identity
  "/home/oub/emacs/site-lisp/versch/vc-ensure-checkin.el" " ")
  vc-delistify("/home/oub/emacs/site-lisp/versch/vc-ensure-checkin.el")
  #[514
  "\303\304\305!\"\210\211\203