On Fri, Mar 07 2025, alain.coch...@unistra.fr wrote:
> #+BEGIN_SRC sh :var filename=(buffer-file-name) :exports both
> wc -w $filename
> #+END_SRC
(buffer-file-name) is evaluating the Emacs Lisp function
`buffer-file-name', which returns a string with the buffer's filename.
>
>
> I have a subtree containing just this code block:
>
> #+BEGIN_SRC shell :var filename=("/tmp/test.r") :exports both
> wc -w $filename
> #+END_SRC
>
> Upon 'C-c C-c', it gives
>
> #+RESULTS:
> : 1 /tmp/test.r
>
> which is what I expect.
>
> However, upon latex export of the subtree (C-c e l p), I get:
>
> org-babel-read: Invalid function: "/tmp/test.r"
Org is trying to evaluate an Emacs Lisp function, "/tmp/test.r", but
that name is invalid since it is a string and not a symbol.
You want to remove the parentheses in this case, because you are passing
a literal string, not wanting to evaluate an elisp function.
>
> Now, if I remove the parentheses, i.e., if I just use
> filename="/tmp/test.r" above, then it works as I expect in both cases, that
> is, there is no error during export and I do see
>
> wc -w $filename
>
> 1 /tmp/test.r
>
> in the exported pdf file.
>
> Are the parentheses in the manual correct? If so, what is the rationale?
> Thanks.
Yes, they manual is correct, just not relevant to your second example.
Leo
