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* [org-babel] Dynamic Tangle?
@ 2010-12-07  4:57 Nathan Neff
  2010-12-13 20:58 ` Eric Schulte
  0 siblings, 1 reply; 2+ messages in thread
From: Nathan Neff @ 2010-12-07  4:57 UTC (permalink / raw)
  To: emacs-orgmode

I'm preparing a presentation and I'm getting using tangle to show code /and/
produce working code examples -- this is really cool.

It is possible to define a "template" and pass code blocks to it?
For example: (Using pseudo-org-babel-code for brevity)

#+template
header code
<<code_that_is_passed_to_me>>
footer code

#+example1 :render #+template with 1111111
1111111111

#+example2 :render #+template with 222222
222222222

The tangled output would be:

header code
11111111111
footer code

header code
2222222222
footer code

I'm already able to use org-babel like below, but I have to
put a <<footer>> and a <<header>> in each code block.

Here's my existing setup:
#+header
header code

#+footer
footer code

#+example1
<<header>>    <-- I have to specify these <<header>> and <<footer>> in
each code block
11111111111
<<footer>>

#+example2
<<header>>
2222222222
<<footer>>

Thanks again for org-babel -- I'll post my presentation when I get it done.

--Nate

^ permalink raw reply	[flat|nested] 2+ messages in thread

• * Re: [org-babel] Dynamic Tangle?
    2010-12-07  4:57 [org-babel] Dynamic Tangle? Nathan Neff
  @ 2010-12-13 20:58 ` Eric Schulte
    0 siblings, 0 replies; 2+ messages in thread
  From: Eric Schulte @ 2010-12-13 20:58 UTC (permalink / raw)
    To: Nathan Neff; +Cc: emacs-orgmode
  
  Hi Nathan,
  
  The easiest way I can think of to accomplish templates would be through
  some abuse of code block evaluation.  Maybe something like the following
  would work...
  
  ** tangle templates
  #+source: template-heading
  #+begin_src emacs-lisp
    some stuff here
  #+end_src
  
  #+source: template-footing
  #+begin_src emacs-lisp
    some other stuff here
  #+end_src
  
  #+source: template
  #+begin_src sh :results output :noweb yes :var body="body stuff"
  heading=$(cat<<EOF
  <<template-heading>>
  EOF
  )
  footing=$(cat<<EOF
  <<template-footing>>
  EOF
  )
  echo $heading
  echo "$body"
  echo $footing
  #+end_src
  
  #+call: template[:noweb yes](body="something new")
  
  #+results: template[:noweb yes](body="something new")
  : some stuff here
  : something new
  : some other stuff here
  
  I hope this makes sense, and isn't too gross looking, for a really clean
  implementation the template function could be located in a different org
  file using the library of babel.
  
  Note, that this relies upon an improvement to variable escaping that I
  just pushed up to the latest version in git.
  
  Best -- Eric
  
  Nathan Neff <nathan.neff@gmail.com> writes:
  
  > I'm preparing a presentation and I'm getting using tangle to show code /and/
  > produce working code examples -- this is really cool.
  >
  > It is possible to define a "template" and pass code blocks to it?
  > For example: (Using pseudo-org-babel-code for brevity)
  >
  > #+template
  > header code
  > <<code_that_is_passed_to_me>>
  > footer code
  >
  > #+example1 :render #+template with 1111111
  > 1111111111
  >
  > #+example2 :render #+template with 222222
  > 222222222
  >
  > The tangled output would be:
  >
  > header code
  > 11111111111
  > footer code
  >
  > header code
  > 2222222222
  > footer code
  >
  > I'm already able to use org-babel like below, but I have to
  > put a <<footer>> and a <<header>> in each code block.
  >
  > Here's my existing setup:
  > #+header
  > header code
  >
  > #+footer
  > footer code
  >
  > #+example1
  > <<header>>    <-- I have to specify these <<header>> and <<footer>> in
  > each code block
  > 11111111111
  > <<footer>>
  >
  > #+example2
  > <<header>>
  > 2222222222
  > <<footer>>
  >
  > Thanks again for org-babel -- I'll post my presentation when I get it done.
  >
  > --Nate
  >
  > _______________________________________________
  > Emacs-orgmode mailing list
  > Please use `Reply All' to send replies to the list.
  > Emacs-orgmode@gnu.org
  > http://lists.gnu.org/mailman/listinfo/emacs-orgmode
  
  ^ permalink raw reply	[flat|nested] 2+ messages in thread

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2010-12-07  4:57 [org-babel] Dynamic Tangle? Nathan Neff
2010-12-13 20:58 ` Eric Schulte

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