[BUG] ox-latex produces broken references to src code listings without caption (was: [BUG] org-lint tells to move #+name to wrong place in results block)

[Ihor Radchenko <yantar92@posteo.net>]

gerard.vermeulen@posteo.net writes:

> I have found that CAPTION keywords  in the "name-result-example" in the
> manual are essential to produce correct links.

It should not be essential. What you demonstrated is two bugs in Org mode.

> In case the relevant blocks have e.g. ":exports both", Org handles
> this, but:
> 1. HTML export requires captions to produce links with unequivocal
>     "link texts" which are numbers in the HTML output.

Fixed, on main.
https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=ea529007d

> 2. LaTeX export requires captions to produce captions with labels like
>     =\caption{\label{path}desc}=.

`org-latex-link' assumes that it is safe to use
\ref{<org-latex--label ...>} in order to refer to an existing src block.
However, it is not true.

`org-latex-src-block--engraved', `org-latex-src-block--minted',
and `org-latex-src-block--listings' only produce a label when src block
has a caption.

We should generally not need to put a caption in order to refer to a
source block listing. At least, it does not look like we need it from
https://tex.stackexchange.com/questions/438260/referencing-without-captions-appearing-but-keeping-numbering

Thoughts? Ideas?

> Tested on example below:
> Produced by listing [[IN]].
>
> #+name: OUT
> #+RESULTS: IN
> #+begin_src emacs-lisp :exports code
> 6
> #+end_src
>
> #+header: :wrap "src emacs-lisp :exports code"
> #+name: IN
> #+begin_src emacs-lisp :exports both
> 6
> #+end_src
>
> Listing [[IN]] produces listing [[OUT]].
>
>  From inspecting HTML or LaTeX output using this example
> for the difference between with and without captions it is
> easy to see that only with captions the output is correct.

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