PATCH: don't emit empty attributes for lstlistings in LaTeX listings backend

PATCH: don't emit empty attributes for lstlistings in LaTeX listings backend

[Pedro Andres Aranda Gutierrez]

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Hi,

attached is a small patch for the Latex export backend that suppresses
emitting empty labels and captions when exporting src blocks using
'listings. This cleans up the emitted LaTeX.

BR,/PA
-- 
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..1291aff95 100644
--- a/lisp/ox-latex.el
+++ b/lisp/ox-latex.el
@@ -3594,11 +3594,11 @@ and FLOAT are extracted from SRC-BLOCK and INFO in `org-latex-src-block'."
           ((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")))
+         (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)))

Re: PATCH: don't emit empty attributes for lstlistings in LaTeX listings backend

[Ihor Radchenko]

Pedro Andres Aranda Gutierrez <paaguti@gmail.com> writes:

> attached is a small patch for the Latex export backend that suppresses
> emitting empty labels and captions when exporting src blocks using
> 'listings. This cleans up the emitted LaTeX.

For record.
There is a new version of this patch in https://orgmode.org/list/CAO48Bk9rjGXZMkuPNyXLeRYow95PfBB=+O0S0UuCMTW_pjar0g@mail.gmail.com

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
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