Re: [O] How to inspect a document and check for the presence of source block language names and support

[Grant Rettke]

What a treat, sir, thank you for sharing that as if by some delightful
magic, which surely it indeed is.

On Sat, Nov 29, 2014 at 4:38 AM, Nicolas Goaziou <address@hidden> wrote:
> Hello,
>
> Andreas Leha <address@hidden> writes:
>
>> Grant Rettke <address@hidden> writes:
>>> Good evening,
>>>
>>> My goal is to obtain the following behavior in org mode for a document:
>>> 1) Report an error if there is a source block without a language
>>>    specified
>>> 2) Report an error if there is a source block with a language specified
>>>    that is *not* present in `org-babel-load-languages'
>>>
>>> I've thought about ways to do this and come up with:
>>> 1) Visually inspect the document
>>> 2) Use `org-element' to parse and process the document
>>
>> I'd be interested in 2) if you come up with something here :-)
>
>   (defun my-src-block-check ()
>     (interactive)
>     (org-element-map (org-element-parse-buffer 'element) 'src-block
>       (lambda (src-block)
>         (let ((language (org-element-property :language src-block)))
>           (cond ((null language)
>                  (error "Missing language at position %d"
>                         (org-element-property :post-affiliated src-block)))
>                 ((not (assoc-string language org-babel-load-languages))
>                  (error "Unknown language at position %d"
>                         (org-element-property :post-affiliated 
> src-block)))))))
>     (message "Source blocks checked in %s." (buffer-name 
> (buffer-base-buffer))))
>
>
> Regards,
>
> --
> Nicolas Goaziou
>



-- 
Grant Rettke
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