From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?utf-8?Q?S=C3=A9bastien_Vauban?= <wxhgmqzgwmuf-geNee64TY+gS+FvcfC7Uqw@public.gmane.org>
Subject: [babel] Execute checks before trying to load Babel languages
Date: Wed, 09 Feb 2011 14:03:50 +0100
Message-ID: <80oc6l9x6x.fsf@missioncriticalit.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org-mXXj517/zsQ@public.gmane.org>
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <http://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request-mXXj517/zsQ@public.gmane.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode-mXXj517/zsQ@public.gmane.org>
List-Help: <mailto:emacs-orgmode-request-mXXj517/zsQ@public.gmane.org?subject=help>
List-Subscribe: <http://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request-mXXj517/zsQ@public.gmane.org?subject=subscribe>
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org-mXXj517/zsQ@public.gmane.org
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org-mXXj517/zsQ@public.gmane.org
To: emacs-orgmode-mXXj517/zsQ@public.gmane.org

Hi,

I am sharing my .emacs file, and this is beginning to cause problems with
people who don't have the same environment as I do. In particular with the
following:

#+begin_src emacs-lisp
          (org-babel-do-load-languages
           'org-babel-load-languages
           '(
             (C . t)
             (R . t)
             (calc . t)
             (ditaa . t)
             (dot . t)
             (emacs-lisp . t)
             (gnuplot . t)
             (haskell . nil)
             (latex . t)
             (ledger . t)
             (ocaml . nil)
             (octave . nil)
             (org . t)
             (perl . t)
             (python . t)
             (ruby . t)
             (screen . t)
             (sh . t)
             (sql . t)
             (sqlite . t)))
#+end_src

Someone got:

--8<---------------cut here---------------start------------->8---
    Debugger entered--Lisp error: (file-error "Cannot open load file" "ob-c=
alc")
--8<---------------cut here---------------end--------------->8---

In fact, this is much more general than checking the Org-version: it addres=
ses
as well installed packages such as

- Rterm (R and ess-mode)
- ditaa (requires =3Dsudo aptitude install openjdk-6-jre=3D)
- gnuplot (requires gnuplot-mode)
- ledger (requires that =3Dob-ledger=3D is found...)
- org (requires that =3Dob-org=3D is found...)
- ruby

Do I have to check myself for such executables in a way similar to:

#+begin_src emacs-lisp
(when (find-exec "Rterm")
  ... add R language ...
  )

(when (file-exists-p "ob-ledger")
  ... add ledger language ...
  )
#+end_src

or could we come up with some more generic and compact solution that would
easily be usable by all of us?

Maybe such a check should be made, by default, in every language file?

Best regards,
  Seb

--=20
S=C3=A9bastien Vauban


_______________________________________________
Emacs-orgmode mailing list
Please use `Reply All' to send replies to the list.
Emacs-orgmode-mXXj517/zsQ@public.gmane.org
http://lists.gnu.org/mailman/listinfo/emacs-orgmode