From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Subject: Re: How to inspect a document and check for the presence of source
 block language names and support
Date: Sat, 29 Nov 2014 11:38:36 +0100
Message-ID: <87egsmnvf7.fsf@nicolasgoaziou.fr>
References: <CAAjq1meLVbnKTX9wnDia31hUwW1hDZ8ZV8+BgS9dPcnhHWZYrQ@mail.gmail.com>
	<olufvd23fv4.fsf@med.uni-goettingen.de>
Mime-Version: 1.0
Content-Type: text/plain
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:56489)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <mail@nicolasgoaziou.fr>) id 1XufPU-0004dQ-AF
	for emacs-orgmode@gnu.org; Sat, 29 Nov 2014 05:37:59 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <mail@nicolasgoaziou.fr>) id 1XufPM-0003cK-Pt
	for emacs-orgmode@gnu.org; Sat, 29 Nov 2014 05:37:52 -0500
Received: from relay5-d.mail.gandi.net ([2001:4b98:c:538::197]:58421)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <mail@nicolasgoaziou.fr>) id 1XufPM-0003c0-JK
	for emacs-orgmode@gnu.org; Sat, 29 Nov 2014 05:37:44 -0500
In-Reply-To: <olufvd23fv4.fsf@med.uni-goettingen.de> (Andreas Leha's message
	of "Sat, 29 Nov 2014 02:22:39 +0000")
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
To: Andreas Leha <andreas.leha@med.uni-goettingen.de>
Cc: emacs-orgmode@gnu.org

Hello,

Andreas Leha <andreas.leha@med.uni-goettingen.de> writes:

> Grant Rettke <gcr@wisdomandwonder.com> 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