Tangle only current code block?

Tangle only current code block?

[Yann Le Du]

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Hi,

I have a bunch of code chunks with stuff like <<fun name>> and headers like
:tangle toto.c exporting to different files in noweb style

If I use C-c C-v t, it extracts all of those code chunks nicely

However, sometimes I would like to put my cursor inside one of those code
chunks and then extract only that one, not the others.

Is there a simple way ?

I narly found a solution, but to make it work nicely I need to put
org-babel-tangle inside a macro, but it fails: if I define a macro :

C-x (
M-x org-babel-tangle
C-x )
C-x e

it fails, saying wrong type argument stringp, nul

I'm lost.

Yann

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Re: Tangle only current code block?

[Eric Schulte]

Yann Le Du <yann.ledu.fr@gmail.com> writes:

> Hi,
>
> I have a bunch of code chunks with stuff like <<fun name>> and headers like
> :tangle toto.c exporting to different files in noweb style
>
> If I use C-c C-v t, it extracts all of those code chunks nicely
>
> However, sometimes I would like to put my cursor inside one of those code
> chunks and then extract only that one, not the others.
>
> Is there a simple way ?
>

Yes, run the tangle with a prefix argument to tangle only the block
under your cursor e.g., C-u C-c C-v t.

Best,

>
> I narly found a solution, but to make it work nicely I need to put
> org-babel-tangle inside a macro, but it fails: if I define a macro :
>
> C-x (
> M-x org-babel-tangle
> C-x )
> C-x e
>
> it fails, saying wrong type argument stringp, nul
>
> I'm lost.
>
> Yann

-- 
Eric Schulte
http://cs.unm.edu/~eschulte

Re: Tangle only current code block?

[Yann Le Du]

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On Mon, Oct 8, 2012 at 1:39 AM, Eric Schulte <eric.schulte@gmx.com> wrote:

> Yann Le Du <yann.ledu.fr@gmail.com> writes:
>
> > Hi,
> >
> > I have a bunch of code chunks with stuff like <<fun name>> and headers
> like
> > :tangle toto.c exporting to different files in noweb style
> >
> > If I use C-c C-v t, it extracts all of those code chunks nicely
> >
> > However, sometimes I would like to put my cursor inside one of those code
> > chunks and then extract only that one, not the others.
> >
> > Is there a simple way ?
> >
>
> Yes, run the tangle with a prefix argument to tangle only the block
> under your cursor e.g., C-u C-c C-v t.
>
>
Very nice! Is that documented? It's not in
http://orgmode.org/manual/Extracting-source-code.html


> Best,
>
> >
> > I narly found a solution, but to make it work nicely I need to put
> > org-babel-tangle inside a macro, but it fails: if I define a macro :
> >
> > C-x (
> > M-x org-babel-tangle
> > C-x )
> > C-x e
> >
> > it fails, saying wrong type argument stringp, nul
> >
> > I'm lost.
> >
> > Yann
>
> --
> Eric Schulte
> http://cs.unm.edu/~eschulte
>

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Re: Tangle only current code block?

[Eric Schulte]

Yann Le Du <yann.ledu.fr@gmail.com> writes:

> On Mon, Oct 8, 2012 at 1:39 AM, Eric Schulte <eric.schulte@gmx.com> wrote:
>
>> Yann Le Du <yann.ledu.fr@gmail.com> writes:
>>
>> > Hi,
>> >
>> > I have a bunch of code chunks with stuff like <<fun name>> and headers
>> like
>> > :tangle toto.c exporting to different files in noweb style
>> >
>> > If I use C-c C-v t, it extracts all of those code chunks nicely
>> >
>> > However, sometimes I would like to put my cursor inside one of those code
>> > chunks and then extract only that one, not the others.
>> >
>> > Is there a simple way ?
>> >
>>
>> Yes, run the tangle with a prefix argument to tangle only the block
>> under your cursor e.g., C-u C-c C-v t.
>>
>>
> Very nice! Is that documented? It's not in
> http://orgmode.org/manual/Extracting-source-code.html
>

This is now mentioned in the documentation.  Cheers,

>
>
>> Best,
>>
>> >
>> > I narly found a solution, but to make it work nicely I need to put
>> > org-babel-tangle inside a macro, but it fails: if I define a macro :
>> >
>> > C-x (
>> > M-x org-babel-tangle
>> > C-x )
>> > C-x e
>> >
>> > it fails, saying wrong type argument stringp, nul
>> >
>> > I'm lost.
>> >
>> > Yann
>>
>> --
>> Eric Schulte
>> http://cs.unm.edu/~eschulte
>>

-- 
Eric Schulte
http://cs.unm.edu/~eschulte

Re: Tangle only current code block?

[Bill White]

On Sun Oct 07 2012 at 18:39, Eric Schulte <eric.schulte@gmx.com> wrote:

> Yann Le Du <yann.ledu.fr@gmail.com> writes:
>
>> Hi,
>>
>> I have a bunch of code chunks with stuff like <<fun name>> and headers like
>> :tangle toto.c exporting to different files in noweb style
>>
>> If I use C-c C-v t, it extracts all of those code chunks nicely
>>
>> However, sometimes I would like to put my cursor inside one of those code
>> chunks and then extract only that one, not the others.
>>
>> Is there a simple way ?
>>
>
> Yes, run the tangle with a prefix argument to tangle only the block
> under your cursor e.g., C-u C-c C-v t.

And you can tangle a consecutive subset of code blocks by narrowing your
org buffer to only those blocks before tangling.  It happens to me so
often I wrote a bit of code to avoid it.  From my emacs.org:

#+begin_src emacs-lisp :tangle yes
(defadvice org-babel-tangle (before widen-before-tangling)
  "Widen a buffer before calling org-babel-tangle."
  (widen))

(ad-activate 'org-babel-tangle)
#+end_src

Cheers -

bw
-- 
Bill White . billw@wolfram.com
"No ma'am, we're musicians."