+(luna-define-method elmo-folder-rename-internal ((folder elmo-maildir-folder)
+ new-folder)
+ (let* ((old (elmo-maildir-folder-directory-internal folder))
+ (new (elmo-maildir-folder-directory-internal new-folder))
+ (new-dir (directory-file-name (file-name-directory new))))
+ (unless (file-directory-p old)
+ (error "No such directory: %s" old))
+ (when (file-exists-p new)
+ (error "Already exists directory: %s" new))
+ (unless (file-directory-p new-dir)
+ (elmo-make-directory new-dir))
+ (rename-file old new)
+ t))
+