Re: [O] [BABEL] BUG Re: Omitting try/catch blocks from tangled R code?

[Eric Schulte]

Rainer M Krug <address@hidden> writes:

> Eric Schulte <address@hidden> writes:
>
>> Rainer M Krug <address@hidden> writes:
>>
>>> Eric Schulte <address@hidden> writes:
>>>
>>>> Charles Berry <address@hidden> writes:
>>>>
>>>>> John Hendy <jw.hendy <at> gmail.com> writes:
>>>>>
>>>>> [deleted]
>>>>>> >
>>>>>> > I think the default behavior should be reverted, as tangling and
>>>>>> > exporting are two different things. When I tangle, I want to see the
>>>>>> > code blocks as they are in the org document (with possible variables 
>>>>>> > and
>>>>>> > expansions) but not to create files where I do not put it explicitly
>>>>>> > into a code block. These wrappers have nothing to do with the code, and
>>>>>> > are only there for the exported engine. So I would either revert to the
>>>>>> > original behavior, or, introduce a new header argument,
>>>>>> > e.g. :include-wrappers, which would, if set to t, include the export
>>>>>> > wrappers in the tangled file. This might be useful for debugging
>>>>>> > exporting of code block results, but not for general tangling.
>>>>>> 
>>>>>> Thanks for chiming in. This was my gut reaction to the default
>>>>>> behavior. I guess we're still only a sample size of 2, but
>>>>>> intuitively, I would think that tangling would be a separate beast in
>>>>>> most cases from exporting. Just to have it on the record, if I tangle,
>>>>>> it's usually to take the code I've used in something like a Beamer
>>>>>> presentation or document and combine it into a single .R file so
>>>>>> someone can run it without needing Org-mode.
>>>>>
>>>>> [deleted]
>>>>>
>>>>> Sorry to be late to add my $0.02...
>>>>>
>>>>> I never want the try/catch wrappers.
>>>>>
>>>>> But noweb is indispensable.
>>>>>
>>>>> I use noweb a lot to organize and collect blocks. In some cases, I export
>>>>> them and in others I just tangle them.
>>>>>
>>>>> I hope that the revised code will allow me to turn off try/catch wrapping
>>>>> and still be able to use noweb when tangling or exporting.
>>>>>
>>>>
>>>> In addition to noweb, there are cases where variable expansion is useful
>>>> in tangled code.
>>>>
>>>> The simplest option is to move things like try/catch blocks out of the
>>>> code block expansion function, and into the execution function.  Then if
>>>> other language present similar constructs (which we want to add to
>>>> execution by default but never want to tangle), we can think about
>>>> abstracting this out into some new level of code block expansion.
>>>>
>>>> Thoughts?
>>>
>>> Makes perfect sense to me, and would definitely be the better place to
>>> add them.
>>>
>>> If one wants enclosing code in the tangling, there is always
>>> the :epilogue and :prologue header arguments, and the try/catch should
>>> be considered as internal to the execution.
>>>
>>
>> Great, how's this patch work?  If it looks good I'll apply it.
>
> Git still puzzles me a lot... If you tell me how I can apply this patch
> (from emacs?) I will try it out.
>

Here are some instructions from the command line.

1. write the patch out to a file on disk, say /tmp/0001-etc...patch

2. cd into the org-mode directory

3. make sure you're up to date with the latest

     git pull

4. apply the patch

     git am /tmp/0001-etc...patch

and that should do it.

Best,

>
> Thanks,
>
> Rainer
>
>>
>> Thanks,

-- 
Eric Schulte
https://cs.unm.edu/~eschulte
PGP: 0x614CA05D