Re: [BUG] LaTeX preview should use a subdirectory in /tmp

[Emmanuel Charpentier]

On 25/03/2024 19:49, Max Nikulin wrote:

> > (defun org-ensure-tmp-dir (dir-symbol prefix)
> >    (let ((dir (symbol-value dir-symbol)))
> >      ;; Temporary directory has not been cleaned.
> >      (or (and dir (file-directory-p dir) dir)
>
>
>`if' should be used instead of `or' here.
>
>
>
>>
>>     (setf (symbol-value dir-symbol)
>>           (make-temp-file (or prefix "orgtmp-") 'dir)))))
>> 
>> (defvar org-tex-tmpdir nil)
>> 
>> Usage example: (org-ensure-tmp-dir 'org-tex-tmpdir "orgtex-")

> I do not like that the function may be called with
different `temporary-file-directory' and I can not figure out how to
adjust API to handle such case. On the other hand I am unsure if it is
a realistic case when this function is called with
alternating `temporary-file-directory'.  

I have a case where the current way of forcing the temporary directory
to me `/tmp` is wrong. Running emacs on Ubuntu **under WSL2**,,
exporting latex snippets to ODT *as images* fails : the `.dvi` files
are correctly compiled and placed in `/tmp{, but the convert program
tries to read them in `../../../../tmp/`, which is indeed `/tmp` in a
"normal" filesystem but **is not** in WSL, where the root (`/`) is in
fact a mounted tree.

Admittedly, this is a corner case, but it turned out to be necessary
(exporting via mathml gave unsatisfying results).