On Wed, 19 Jan 2011, Chris Maier wrote:

> On Wed, Jan 19, 2011 at 5:05 AM, Rainer M Krug <r.m.krug@gmail.com> wrote:
>> On 01/19/2011 08:22 AM, Eric Schulte wrote:
>>>
>>> In addition to the solution Charles posted, it is possible to put
>>> arbitrary elisp forms into header arguments, so the following
>>> alternative to your block above will create the directory (if it doesn't
>>> already exist) whenever the block is tangled or evaluated.
>>>
>>> #+begin_src clojure :tangle (prog1 "src/foo.clj" (make-directory "src" "."))
>>>   (ns foo)
>>>
>>>   (defn my-inc [x]
>>>     (+ x 1))
>>> #+end_src
>
> This will do what I'm looking for, thanks!
>
> Is there a place where this and the eval-on-startup trick Charles
> posted are documented?  If so, I missed it, and these are both really
> useful to know.


C-h i, then navigate to

(emacs)Top > Customization > Variables > File Variables > Specifying File 
Variables

'eval' is a special kind of file variable.

Chuck

>
>> Would it be possible, to include this into tangling, i.e. if the folder
>> in which the source file should be created does not exist, create it?
>>
>> I remember vaguely a discussion along these lines some time ago, but I
>> don't remember the outcome?
>
> This would be a great feature to have.  Eric's embedded Lisp code
> trick will do the job, but I can imagine that it would get cumbersome
> for more complex projects.
>
> Thanks for all the help, everyone!
>
> Chris
>

Charles C. Berry                            Dept of Family/Preventive Medicine
cberry@tajo.ucsd.edu			    UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901