On 02.01.2024 11:48, Ihor Radchenko wrote:
> gerard.vermeulen@posteo.net writes:
> 
[...]
> 
> IMHO, this is a bug.
> The current approach with regexp matching in 
> `org-babel-demarcate-block'
> is clearly not accurate. What would be more robust is using
> org-element-at-point + org-element-copy + set :value +
> org-element-interpret-data to carry over all the affiliated keywords 
> and
> header arguments.
> 
[...]
> 
> (org-babel--get-vars (nth 2 (org-babel-get-src-block-info)))

Attached you'll find a new patch trying to implement your suggestions.
Interactive splitting by demarcation seems to work quite well (see the
before and after splitting snippets in the PS).

However, I cannot run the test because org-babel-demarcate-block
always errors "org-element--cache: Emergency exit" while the same
input works interactively. Could there be a problem of cache
synchronization or something like that? Is there something I can do?

I also did not yet look into how to propagate a switch like -n10.

PS:
# begin before splitting snippet
#+caption[Demarcation splitting test]:
#+caption: Demarcation splitting test.
#+header: :var edge="also copied"
#+header: :wrap "src any-spanish -n"
#+name: lst:test
#+begin_src python -i -n :var here="copied" :wrap "src any-english -n"

# above-split

# below-split

#+end_src
# end before splitting snippet

# begin after splitting snippet
#+caption[Demarcation splitting test]:
#+caption: Demarcation splitting test.
#+header: :var edge="also copied"
#+header: :wrap "src any-spanish -n"
#+name: lst:test
#+begin_src python -i -n :var here="copied" :wrap "src any-english -n"

# above-split
#+end_src

#+header: :var edge="also copied"
#+header: :wrap "src any-spanish -n"
#+begin_src python -i -n :var here="copied" :wrap "src any-english -n"

# below-split
#+end_src
# end after splitting snippet