Re: Babel should not work in the subtree marked as not exported

[zwz <zhangweize@gmail.com>]

Sebastien Vauban <sva-news@mygooglest.com>
writes:

> Rainer M Krug wrote:
>> Ken Mankoff <mankoff@gmail.com> writes:
>>> On 2014-03-11 at 08:47, zwz wrote:
>>>> In my setup, there is 
>>>> (setq org-export-exclude-tags '("private" "exclude")
>>>>
>>>> and In my test.org:
>>>>
>>>> * test
>>>>
>>>> ** Not exported                :exclude:
>>>>    #+BEGIN_SRC ditaa :file test.png :cmdline -E
>>>>           +--------+---+---+---+---+---+---+---+  +---+---+---+---+---+---+---+---+
>>>>       x   | 0 cRED | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 |
>>>>           +--------+---+---+---+---+---+---+---+  +---+---+---+---+---+---+---+---+
>>>>    #+END_SRC
>>>>
>>>> ** blah blah
>>>>    blah blah blah
>>>>
>>>>
>>>> When I try to export it to pdf, the test.png is still generated,
>>>> although it is not used for the pdf at all.
>>>> So I think the export procedure may be optimized for more efficiency.
>>>
>>> No, because I often have code and sections I don't want exported, but
>>> I want their side-effects active. For example, code with sessions
>>> where part is not exported, but I need that code run so code
>>> elsewhere, using the same session, is able to run and be exported.
>>
>> AFAIK, this depends if you use a session. When you are using a session,
>> *all* code blocks are evaluated, if you do not set the header argument
>> session, only the ones which are exported are evaluated - precisely the
>> reason you give.
>
> We should know if zwz uses a session or not. Because, IIUC, what he
> reports is that all code blocks are evaluated, even the ones which are
> not exported.
>
> Best regards,
>   Seb
I checked my org settings, and did not found anything about "session".
And here is the options in the file:
#+OPTIONS:   H:2 num:t toc:t \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t

Is session turned on by default?