Hi

First of all thanks for integrating Org-babel into Org-mode.

But for the less fluent elisp and org-mode users, I am slightly confused in
the changes necessary on my side.

I have the following in my emacs.org file:


#+begin_src emacs-lisp
  (require 'org-babel-R)         ;; requires R and ess-mode
  ;; (require 'org-babel-ruby)      ;; requires ruby, irb, ruby-mode, and
inf-ruby
  (require 'org-babel-python)    ;; requires python, and python-mode
  ;; (require 'org-babel-clojure)   ;; requires clojure, clojure-mode,
swank-clojure and slime
#+end_src
*** Start babel
#+begin_src emacs-lisp
  (org-babel-load-library-of-babel)
#+end_src
*** Customization of sh
  set shebang for sh script to "#!/bin/bash" and exclude additional comments
(t)
#+begin_src emacs-lisp
  (setq org-babel-tangle-langs
  (cons
  '("sh" "sh" "#!/bin/bash" t)
  (remove-if (lambda (el) (string= (car el) "sh")) org-babel-tangle-langs)))
#+end_src
*** Customization of R
  set shebang for R script to "" and exclude additional comments (t)
#+begin_src emacs-lisp
  (setq org-babel-tangle-langs
  (cons
  '("R" "R")
  (remove-if (lambda (el) (string= (car el) "R")) org-babel-tangle-langs)))
#+end_src

which custimizes the shebang creation and the comments in the tangled file.
Do I have to change any settings, and if yes, how? The previous conversation
seems to say "yes, it needs to be changed", but I don't understand what and
how.


Thanks,

Rainer.
On Thu, Jun 24, 2010 at 6:27 PM, Eric Schulte <schulte.eric@gmail.com>wrote:

> Hi Sébastien,
>
> Sébastien Vauban <wxhgmqzgwmuf@spammotel.com> writes:
>
> [...]
> >
> > For my own understanding, what's the status of `Org-babel-screen', for
> which
> > I've never been able to understand completely all the differences with
> `sh' in
> > `Org-babel'?
> >
>
> I believe screen has more of a focus on sustained interaction with an
> interactive terminal, although to be honest I haven't really used it and
> can't say for sure.  Benjamin Andresen, the author, may have a more
> satisfying answer for you.
>
> >
> > Second, a problem with the following code:
> >
> >       ;; Org-babel needs to be told to recognize awk source code blocks
> and
> >       ;; how they should be tangled, which can be accomplished with the
> >       ;; following:
> >       (org-babel-add-interpreter "awk")
> >       (add-to-list 'org-babel-tangle-langs '("awk" "awk"))
> >
> >       (org-babel-add-interpreter "fortran")
> >       (add-to-list 'org-babel-tangle-langs '("fortran" "f"))
> >
> >       ;; ;; org-babel panics when trying to evaluate ruby code blocks
> because
> >       ;; ;; you don't have the required ruby executables available on
> your
> >       ;; ;; system. Probably the best way to deal with this is to remove
> ruby
> >       ;; ;; from the list of languages supported by babel:
> >       ;; (setq org-babel-interpreters (delete "ruby"
> org-babel-interpreters))
> >
> >       ;; make pre-built helper functions (`lob') available
> >       ;; (org-babel-load-library-of-babel)
> >
> >       ;; mapping between languages (listings in LaTeX) and their major
> mode
> >       ;; (in Emacs)
> >       (setq org-src-lang-modes
> >             '(("ocaml" . tuareg)
> >               ("elisp" . emacs-lisp)
> >               ;; ("Delphi" . perl)
> >               ("ditaa" . artist)
> >               ("asymptote" . asy)
> >               ("dot" . fundamental)))
> >       ;; )
> >
> > Neither org-babel-add-interpreter, neither its shorter version do exist
> now?
> >
>
> Yes, thanks for bringing this up! I realized last night that I forgot to
> mention this in the announcement.
>
> We have simplified the handling of languages in Org-babel, in that the
> org-babel-interpreters and org-babel-tangle-langs variables have both
> been removed.
>
> Rather than keeping explicit lists of supported languages, Babel will
> now try to work with every language, and will only give up if it can't
> find a needed function (e.g. if there is no org-babel-execute:foo
> function defined then babel will give up on evaluating a foo code
> block).  The only remaining language list is
> `org-babel-tangle-lang-exts' which can optionally be used to associate
> file extensions with language names, but is *not* required for
> evaluation or tangling.
>
> Given this, your configuration from above could be rewritten as
>
> --8<---------------cut here---------------start------------->8---
>       ;; Org-babel now needs less hand-holding :) however it could be
>      ;; useful to know extensions for some languages
>      (add-to-list 'org-babel-tangle-lang-exts '("fortran" . "f"))
>
>      ;; mapping between languages (listings in LaTeX) and their major mode
>      ;; (in Emacs)
>      (setq org-src-lang-modes
>            '(("ocaml" . tuareg)
>              ("elisp" . emacs-lisp)
>              ;; ("Delphi" . perl)
>              ("ditaa" . artist)
>              ("asymptote" . asy)
>              ("dot" . fundamental)))
>      ;; )
> --8<---------------cut here---------------end--------------->8---
>
> Cheers -- Eric
>
> >
> > Best regards,
> >   Seb
>
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