Fix building of VC package manuals with relative org links/includes

* lisp/emacs-lisp/package-vc.el (package-vc--build-documentation):
Ensure that default-default is the docs-directory around
org-export-to-file to ensure that links to relative files work
correctly.  (Bug#65243)

diff --git a/lisp/emacs-lisp/package-vc.el b/lisp/emacs-lisp/package-vc.el
index b4c911015b595ba5d88765644f695189f113eb34..ffc7afeb2eeada335e263f41edf08320c4c4d846 100644 (file)
--- a/lisp/emacs-lisp/package-vc.el
+++ b/lisp/emacs-lisp/package-vc.el
@@ -356,7 +356,8 @@ otherwise it's assumed to be an Info file."
       (with-temp-buffer
         (insert-file-contents file)
         (setq file (make-temp-file "ox-texinfo-"))
-        (org-export-to-file 'texinfo file)
+        (let ((default-directory docs-directory))
+          (org-export-to-file 'texinfo file))
         (setq clean-up t)))
     (with-current-buffer (get-buffer-create " *package-vc doc*")
       (erase-buffer)