bug#32251: [Windows] Cannot locate gs when the path contains space

[Jian Wang]

Hi, all

When I try to preview on windows, the Ghostscript executable bundled with MiKTeX cannot be located since the path of MiKTeX contains a space. Thus when I open a tex buffer there will be an echoed message telling me ''c:/Program" is not a valid command.

I fixed this issue by making the following change:

(defcustom preview-gs-command

  (or ;; The GS wrapper coming with TeX Live

   (executable-find "rungs")

   ;; The MikTeX builtin GS

   (let ((gs (executable-find "mgs")))

   ;; Check if mgs is functional for external non-MikTeX apps.

   ;; See http://blog.miktex.org/post/2005/04/07/Starting-mgsexe-at-the-DOS-Prompt.aspx

   (when (and gs (= 0 (shell-command (concat (shell-quote-argument gs) " -q -dNODISPLAY -c quit"))))

     gs))

   ;; Windows ghostscript

   (executable-find "GSWIN32C.EXE")

   ;; standard GhostScript

   (executable-find "gs"))

  "*How to call gs for conversion from EPS.  See also `preview-gs-options'."

  :group 'preview-gs

  :type 'string)

I wrap the 'gs' variable with a 'shell-quote-argument' and voila! I hope this would be helpful for those who had the same issue.

Best regards,

James