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From: Alain.Cochard@unistra.fr
To: alain.cochard@unistra.fr
Cc: Org Mode List <emacs-orgmode@gnu.org>,
	"Fraga, Eric" <e.fraga@ucl.ac.uk>,
	Greg Minshall <minshall@umich.edu>
Subject: Re: Confused about source code blocks evaluation when exporting
Date: Tue, 12 Jul 2022 23:13:49 +0200	[thread overview]
Message-ID: <25293.58381.803841.645075@gargle.gargle.HOWL> (raw)
In-Reply-To: <25293.28342.763993.795868@gargle.gargle.HOWL>


Fraga, Eric writes on Tue 12 Jul 2022 14:08:

 > On Tuesday, 12 Jul 2022 at 14:53, Alain.Cochard@unistra.fr wrote:
 > > So far so good.  (Well almost: why does '#+RESULTS:' show 'bar' and
 > > not 'foo'?  After all, I'm just setting 'my-var', I'm not asking to
 > > display its value.  But that's incidental.)
 > 
 > It's not incidental.  By default, the results of a src block evaluation
 > is the value of the src block which is typically the value returned by
 > the last statement.

I guess I didn't use 'incidental' correctly.  I meant it as "not my
main concern".  Anyway, thank you; I could check that if I switch the
2 lines I indeed get '#+RESULTS:' to show foo'.

 > You can modify this by adding
 > 
 > :results output
 > 
 > for instance to the begin_src line.
 > 
 > > (test 2) Same org file.  If I do 'C-c C-e l o', no question is asked,
 > > no '#+RESULTS:' block is inserted, and the resulting pdf file shows:
 > 
 > On export, the default is to export the code.  If you want the results,
 > you need to add
 > 
 > :exports results
 > 
 > or if you want both code and results,
 > 
 > :exports both

Greg Minshall writes on Tue 12 Jul 2022 17:22:

 > maybe look in the org manual for ":results" (with "value" or
 > "output" as options) and ":exports" (with "code" or "results" or
 > "both" as options).

Thank you both, I made progress; but the behavior is still very so
unintuitive to me.  For example, I haven't found a way to have this
block:

#+begin_src emacs-lisp <arguments to be determined>
  (message "foo")
  (message "bar")
#+END_SRC

and have the following inserted during export:

#+RESULTS:
: foo
: bar

(after all, that is was goes into the *Messages* buffer upon
evaluation with 'C-c C-c'...)


Finally I still tend to consider that the sentence "Org evaluates
source code blocks in an Org file during export" is confusing.  But
maybe that's just I who interpret this as "code evaluation is the
default behavior upon export".

Regards

-- 
EOST (École et Observatoire des Sciences de la Terre) 
ITE (Institut Terre & Environnement) | alain.cochard@unistra.fr
5 rue René Descartes   [bureau 106]  | Phone: +33 (0)3 68 85 50 44 
F-67084 Strasbourg Cedex, France     | [ slot available for rent ]



  parent reply	other threads:[~2022-07-12 21:15 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-12 12:53 Confused about source code blocks evaluation when exporting Alain.Cochard
2022-07-12 14:08 ` Fraga, Eric
2022-07-14  5:47   ` Rudolf Adamkovič
2022-07-12 14:22 ` Greg Minshall
2022-07-12 21:13 ` Alain.Cochard [this message]
2022-07-13 10:57   ` Fraga, Eric
2022-07-13 21:06     ` Alain.Cochard
2022-07-14  7:06       ` Fraga, Eric
2022-07-14  8:09         ` Alain.Cochard
2022-07-14  8:35           ` Fraga, Eric
2022-07-20 12:12             ` Alain.Cochard
2022-07-20 12:43               ` Fraga, Eric
2022-07-22  4:27                 ` Alain.Cochard
2022-07-22 17:09                   ` Fraga, Eric
2022-07-22 22:21                     ` Alain.Cochard
2022-07-14  6:06 ` Rudolf Adamkovič
2022-07-14  6:48   ` Alain.Cochard

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