From mboxrd@z Thu Jan  1 00:00:00 1970
From: Neil Jerram <neil@ossau.homelinux.net>
Subject: Re: Problem with bash arrays from list-valued org-babel :var
 assignments?
Date: Fri, 9 Jun 2017 10:16:07 +0100
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To: Keith Amidon <camalot@picnicpark.org>, emacs-orgmode@gnu.org

On 09/06/17 05:56, Keith Amidon wrote:
> With current org-mode, when I try to execute the following org-babel
> block:
>
> #+begin_src bash :var lst='(1 2 3 4 5 6 7)
> printf "%s\n" "${lst[*]}"
> #+end_src
>
> I get result and the following error in the minibuffer:
>
>     Wrong type argument: listp, 1
>
> This, on the other hand works fine:
>
> #+begin_src emacs-lisp :var lst='(1 2 3 4 5 6 7)
> lst
> #+end_src
>
> In investigating this, I looked into the code for how bash variables
> are set from the org variables and found this code in ob-shell that I
> don't really understand:
>
> (defun org-babel--variable-assignments:bash (varname values &optional sep hline)
>    "Represents the parameters as useful Bash shell variables."
>    (if (listp values)
>        (if (and (listp (car values)) (= 1 (length (car values))))
> 	  (org-babel--variable-assignments:bash_array varname values sep hline)
> 	(org-babel--variable-assignments:bash_assoc varname values sep hline))
>      (org-babel--variable-assignments:sh-generic varname values sep hline)))

Based on that code, I'd expect this to work, and it does:

#+begin_src bash :var lst='((1) (2) (3) (4) (5) (6) (7))
printf "%s\n" "${lst[*]}"
#+end_src

#+RESULTS:
: 1 2 3 4 5 6 7

But I agree that it would still be nice if the more intuitive form that 
you mentioned also worked.

Regards,
      Neil