Tangling to Multiple Files

Tangling to Multiple Files

[Alan Lue]

Hi, how does one tangle a single code block to multiple files?

I thought the following might work, but unfortunately it does not.

Set the frame size.
#+HEADERS: :tangle user-host-a.el user-host-b.el
#+BEGIN_SRC emacs-lisp
  (setq initial-frame-alist '((width . 80) (height . 38)))
#+END_SRC

To provide some background, I'm using =org-babel-load-file= in my
init.el file to load up my Emacs configuration from an Org file—call it
"user.org." I'd like to use just one user.org file across multiple
computers, however, meaning I'd like user.org to tangle into
user-host-a.el and user-host-b.el, for instance.

The configurations are only slightly different, so I'd like to be able
to selectively indicate to Org-mode which code blocks to tangle
into.

Re: Tangling to Multiple Files

[Thomas S. Dye]

Aloha Alan,

This can be achieved with noweb references.

Something like this:

#+name: user-host-a
#+HEADERS: :tangle user-host-a.el :noweb tangle
#+BEGIN_SRC emacs-lisp
<<initial-frame>>
#+END_SRC

#+name: user-host-b
#+HEADERS: :tangle user-host-b.el :noweb tangle
#+BEGIN_SRC emacs-lisp
<<initial-frame>>
#+END_SRC

#+name: initial-frame
#+BEGIN_SRC emacs-lisp
  (setq initial-frame-alist '((width . 80) (height . 38)))
#+END_SRC

hth,
Tom

Alan Lue <alan.lue@gmail.com> writes:

> Hi, how does one tangle a single code block to multiple files?
>
> I thought the following might work, but unfortunately it does not.
>
> Set the frame size.
> #+HEADERS: :tangle user-host-a.el user-host-b.el
> #+BEGIN_SRC emacs-lisp
>   (setq initial-frame-alist '((width . 80) (height . 38)))
> #+END_SRC
>
> To provide some background, I'm using =org-babel-load-file= in my
> init.el file to load up my Emacs configuration from an Org file—call it
> "user.org." I'd like to use just one user.org file across multiple
> computers, however, meaning I'd like user.org to tangle into
> user-host-a.el and user-host-b.el, for instance.
>
> The configurations are only slightly different, so I'd like to be able
> to selectively indicate to Org-mode which code blocks to tangle
> into.
>
>
>

-- 
Thomas S. Dye
http://www.tsdye.com

Re: Tangling to Multiple Files

[Eric Schulte]

Alan Lue <alan.lue@gmail.com> writes:

> Hi, how does one tangle a single code block to multiple files?
>
> I thought the following might work, but unfortunately it does not.
>
> Set the frame size.
> #+HEADERS: :tangle user-host-a.el user-host-b.el
> #+BEGIN_SRC emacs-lisp
>   (setq initial-frame-alist '((width . 80) (height . 38)))
> #+END_SRC
>
> To provide some background, I'm using =org-babel-load-file= in my
> init.el file to load up my Emacs configuration from an Org file—call it
> "user.org." I'd like to use just one user.org file across multiple
> computers, however, meaning I'd like user.org to tangle into
> user-host-a.el and user-host-b.el, for instance.
>
> The configurations are only slightly different, so I'd like to be able
> to selectively indicate to Org-mode which code blocks to tangle
> into.
>
>

You could try something like the following to tangle out to a different
file on each machine.

  :tangle (format "%s.el" system-name)

or

  :tangle (format "%s.el" user-login-name)

Hope this helps,

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

Re: Tangling to Multiple Files

[Alan Lue]

Thanks Eric, I didn't know that you could pass lisp code as header
arguments. It looks like it'll be best to conditionally tangle.

 :tangle (if (string-match "myhost" system-name) "yes" "no")

Eric Schulte <schulte.eric@gmail.com> writes:

> Alan Lue <alan.lue@gmail.com> writes:
>
>> Hi, how does one tangle a single code block to multiple files?
>>
>> I thought the following might work, but unfortunately it does not.
>>
>> Set the frame size.
>> #+HEADERS: :tangle user-host-a.el user-host-b.el
>> #+BEGIN_SRC emacs-lisp
>>   (setq initial-frame-alist '((width . 80) (height . 38)))
>> #+END_SRC
>>
>> To provide some background, I'm using =org-babel-load-file= in my
>> init.el file to load up my Emacs configuration from an Org file—call it
>> "user.org." I'd like to use just one user.org file across multiple
>> computers, however, meaning I'd like user.org to tangle into
>> user-host-a.el and user-host-b.el, for instance.
>>
>> The configurations are only slightly different, so I'd like to be able
>> to selectively indicate to Org-mode which code blocks to tangle
>> into.
>>
>>
>
> You could try something like the following to tangle out to a different
> file on each machine.
>
>   :tangle (format "%s.el" system-name)
>
> or
>
>   :tangle (format "%s.el" user-login-name)
>
> Hope this helps,