Re: PATCH: include controlling language= in my previous patch

[Pedro Andres Aranda Gutierrez <paaguti@gmail.com>]

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Hi Ihor,

thanks for the patience. I have a comment on the message you refer to... If
comes from 2014.

So I have resorted to my fresh Emacs29, opened it with emacs -Q for a clean
environment.

With the MWE
```
#+CAPTION: caption of block 1
#+BEGIN_SRC asm
vmpovapd %%zmm0, %zmm1
#+END_SRC


#+LABEL: lst:second
#+BEGIN_SRC asm
vmpovapd %%zmm0, %zmm1
#+END_SRC

# Local Variables:
# org-latex-listings: 'listings
# End:
```
I get the following:
```
\begin{lstlisting}[language=asm,label= ,caption={caption of block
1},captionpos=b,numbers=none]
vmpovapd %%zmm0, %zmm1
\end{lstlisting}


\begin{lstlisting}[language=asm,label=lst:org2f3fc09,caption=
,captionpos=b,numbers=none]
vmpovapd %%zmm0, %zmm1
\end{lstlisting}

```

In my most humble opinion, I looks like the global \lstset{} isn't used and
that the caption/label is set locally. And this makes me believe that
label= or caption= are not very useful.

I have extended my research to a SRC block without language and that
results in a \begin{verbatim}--\end{verbatim}

I'm attaching the patch generated with git diff -p.
Mea culpa, I should have RTFM before sending anything :-)

Best, /PA


On Sun, 11 Dec 2022 at 11:05, Ihor Radchenko <yantar92@posteo.net> wrote:

> Note: This email thread is a followup for
> https://orgmode.org/list/CAO48Bk_6bqKgp1MgnZaARYku2+St6R1D4Bziq5NzMWNEWqfitw@mail.gmail.com
>
> Pedro Andres Aranda Gutierrez <paaguti@gmail.com> writes:
>
> > I have a second version of my previous patch, inlcuing and extra variable
> > to control whether you want to include the language= or not. It is made
> in
> > a backwards-compatible way. Default is to include it and you have to
> >
> > (setq org-latex-listings-src-omit-language t)
> >
> > to omit language=
>
> Makes sense from a first glance.
>
> > +         (when label                    ; label= w/o label makes little
> sense
> > +             `(("label" ,(org-latex--label src-block info))))
> > +         (when caption-str              ; caption= w/o caption makes
> little sense
> > +           `(("caption" ,caption-str))
> > +           `(("captionpos" ,(if caption-above-p "t" "b")))) ; as does
> captionpos w/o caption
>
> This is not true. We do need that empty caption/label.
> See
> https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=eaaa5c2e4
> and
> https://orgmode.org/list/534BEAFB.4080607@gmx.de
>
> Also, if you can, please create a proper patch instead of diff. See
> https://orgmode.org/worg/org-contribute.html#first-patch
>
> --
> Ihor Radchenko // yantar92,
> Org mode contributor,
> Learn more about Org mode at <https://orgmode.org/>.
> Support Org development at <https://liberapay.com/org-mode>,
> or support my work at <https://liberapay.com/yantar92>
>


-- 
Fragen sind nicht da um beantwortet zu werden,
Fragen sind da um gestellt zu werden
Georg Kreisler

Headaches with a Juju log:
unit-basic-16: 09:17:36 WARNING juju.worker.uniter.operation we should run
a leader-deposed hook here, but we can't yet

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diff --git a/lisp/ox-latex.el b/lisp/ox-latex.el
index 5b29a284c..a319fa830 100644
--- a/lisp/ox-latex.el
+++ b/lisp/ox-latex.el
@@ -1021,6 +1021,16 @@ in this list - but it does not hurt if it is present."
 	   (symbol :tag "Major mode       ")
 	   (string :tag "Listings language"))))
 
+(defcustom org-latex-listings-src-omit-language nil
+  "Set this option to t to omit the
+\"language=\"
+in the parameters to \\begin{lstlisting} when exporting a src block"
+  :group 'org-export-latex
+  :version "30.0"
+  :package-version '(Org . "9.7")
+  :type 'boolean
+  )
+
 (defcustom org-latex-listings-options nil
   "Association list of options for the latex listings package.
 
@@ -3593,12 +3603,13 @@ and FLOAT are extracted from SRC-BLOCK and INFO in `org-latex-src-block'."
           ((string= "multicolumn" float) '(("float" "*")))
           ((and float (not (assoc "float" lst-opt)))
            `(("float" ,(plist-get info :latex-default-figure-position)))))
-         `(("language" ,lst-lang))
-         (if label
-             `(("label" ,(org-latex--label src-block info)))
-           '(("label" " ")))
-         (if caption-str `(("caption" ,caption-str)) '(("caption" " ")))
-         `(("captionpos" ,(if caption-above-p "t" "b")))
+         (unless org-latex-listings-src-omit-language
+           `(("language" ,lst-lang)))
+         (when label                    ; label= w/o label makes little sense
+             `(("label" ,(org-latex--label src-block info))))
+         (when caption-str              ; caption= w/o caption makes little sense
+           `(("caption" ,caption-str))
+           `(("captionpos" ,(if caption-above-p "t" "b")))) ; as does captionpos w/o caption
          (cond ((assoc "numbers" lst-opt) nil)
                ((not num-start) '(("numbers" "none")))
                (t `(("firstnumber" ,(number-to-string (1+ num-start)))