From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Sebastien Vauban" Subject: Re: [babel] eval code only once :eval once Date: Mon, 16 Apr 2012 12:50:53 +0200 Message-ID: <803984ympe.fsf@somewhere.org> References: Mime-Version: 1.0 Content-Type: text/plain Return-path: List-Id: "General discussions about Org-mode." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org-mXXj517/zsQ@public.gmane.org Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org-mXXj517/zsQ@public.gmane.org To: emacs-orgmode-mXXj517/zsQ@public.gmane.org Hi Thomas, Thomas S. Dye wrote: > Torsten Wagner writes: >> I started to use lisp (as well as other) code blocks more and more to >> modify my work environment (emacs) for a particular (buffer-based) >> task. >> That is I change some variables, add some stuff etc. >> A real world example is for example the section below >> >> * Set-up :nonexport: >> #+source: setup-minted >> #+begin_src emacs-lisp :exports none :results silent >> (setq org-export-latex-listings 'minted) >> (setq org-export-latex-custom-lang-environments >> '( >> (emacs-lisp "common-lispcode") >> )) >> (setq org-export-latex-minted-options >> '(("frame" "lines") >> ("fontsize" "\\scriptsize") >> ("linenos" ""))) >> (setq org-latex-to-pdf-process >> '("pdflatex -shell-escape -interaction nonstopmode >> -output-directory %o %f" >> "pdflatex -shell-escape -interaction nonstopmode >> -output-directory %o %f" >> "pdflatex -shell-escape -interaction nonstopmode >> -output-directory %o %f")) >> #+end_src >> >> This are settings from worg, which I use only during my work on that >> particular file/buffer e.g. to modify the export of the following >> beamer presentation. >> Whenever I load the buffer I jump to set-up and hit C-c C-C to execute >> it once. After that exports will do what I want. >> If I would change the above to :exports results and :results silent I >> would be asked to execute the code block on every export. >> Thanks to the new auto completion feature, I came across :eval and >> wonder if it makes sense to add >> :eval once >> and >> :eval once-query >> >> Which would allow to execute it only once (with query) if not called >> before and otherwise keeps quite. >> That would make *Set-up blocks much more efficient. >> Was thinking why there is no 'no-query' resp. 'always' flag which >> would execute code blocks without query even if asked for it in >> general but that would be somehow against safety measures ;) > > Aloha Totti, > > Will :cache yes do what you want? I'd answer no, as this wouldn't be re-eval'ed the next time he opens that buffer. But...? Best regards, Seb -- Sebastien Vauban