* Babel: tangling questions
@ 2019-12-03 9:53 Jarmo Hurri
2019-12-03 13:28 ` Diego Zamboni
0 siblings, 1 reply; 3+ messages in thread
From: Jarmo Hurri @ 2019-12-03 9:53 UTC (permalink / raw)
To: emacs-orgmode
Greetings.
I am trying to tangle code to a specific directory.
1. I want to tangle to the default filename (derived from name of org
file and programming language). However, the :tangle header argument
only takes either "yes" or "filename." If the value is "yes", then
the filename is deduced automatically. How can I specify a tangling
directory and still have the default filename?
There was a related question on stack exchange, but it did not use
the default filename:
https://emacs.stackexchange.com/questions/41806/org-babel-set-root-dir-for-tangled-files
2. The question above implies a feature request: third possible value
for :tangle, a directory. In this case code would be tangled into the
specified directory into a file with default filename. Any support?
3. Is it possible to tangle automatically on (every) export? I always
export, but I might forget to tangle, in which case export and tangle
would be out of sync.
Someone asked about this a while ago on stack exchange, but maybe
things have changed:
https://emacs.stackexchange.com/questions/24645/exporting-and-tangling-simultaneously-in-org-mode
Thanks a bunch in advance.
Jarmo
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Babel: tangling questions
2019-12-03 9:53 Babel: tangling questions Jarmo Hurri
@ 2019-12-03 13:28 ` Diego Zamboni
2019-12-03 15:22 ` Jarmo Hurri
0 siblings, 1 reply; 3+ messages in thread
From: Diego Zamboni @ 2019-12-03 13:28 UTC (permalink / raw)
To: Org-mode; +Cc: Jarmo Hurri
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Hi Jarmo,
1. I want to tangle to the default filename (derived from name of org
> file and programming language). However, the :tangle header argument
> only takes either "yes" or "filename." If the value is "yes", then
> the filename is deduced automatically. How can I specify a tangling
> directory and still have the default filename?
>
> There was a related question on stack exchange, but it did not use
> the default filename:
>
> https://emacs.stackexchange.com/questions/41806/org-babel-set-root-dir-for-tangled-files
You can specify a full path as the value of :tangle, but I don't know of a
way to specify only the directory.
As a workaround, you can also use emacs-lisp code as the value for :tangle,
so you could do something like this:
:tangle (concat "/some/dir/" (file-name-base (file-name-sans-extension
(buffer-file-name))) ".ext")
3. Is it possible to tangle automatically on (every) export? I always
> export, but I might forget to tangle, in which case export and tangle
> would be out of sync.
>
I use the following hook to tangle on every save. I find it indispensable :)
(add-hook 'org-mode-hook (lambda () (add-hook 'after-save-hook
'org-babel-tangle
'run-at-end 'only-in-org-mode)))
Also, check out my free book "Literate Config", where I discuss some more
tips about Literate Programming: https://leanpub.com/lit-config/read
Hope this helps,
--Diego
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: Babel: tangling questions
2019-12-03 13:28 ` Diego Zamboni
@ 2019-12-03 15:22 ` Jarmo Hurri
0 siblings, 0 replies; 3+ messages in thread
From: Jarmo Hurri @ 2019-12-03 15:22 UTC (permalink / raw)
To: emacs-orgmode
Greetings Diego.
Diego Zamboni <diego@zzamboni.org> writes:
>> 1. I want to tangle to the default filename (derived from name of org
>> file and programming language). However, the :tangle header argument
>> only takes either "yes" or "filename." If the value is "yes", then
>> the filename is deduced automatically. How can I specify a tangling
>> directory and still have the default filename?
>
> You can specify a full path as the value of :tangle, but I don't know
> of a way to specify only the directory.
For my purposes this would be a nice new feature. Specifying a directory
would imply the default filename.
> As a workaround, you can also use emacs-lisp code as the value for
> :tangle, so you could do something like this:
>
> :tangle (concat "/some/dir/" (file-name-base (file-name-sans-extension
> (buffer-file-name))) ".ext")
Nice! For this to be practical, I need two additional features.
1. Ability to set "/some/dir/" on a per-file basis.
2. Ability to infer ".ext" from the source block.
I was actually extend your suggestion to a solution with both of these
properties. In my emacs init file I define:
(defun org-default-tangle-file-with-dir-from-property ()
(concat (or (org-entry-get nil "ORG_TANGLE_DIRECTORY" t) ".")
"/"
(file-name-base (file-name-sans-extension (buffer-file-name)))
"."
(let ((lang (car (org-babel-get-src-block-info t))))
(or (cdr (assoc lang org-babel-tangle-lang-exts)) lang))))
Then I set on the top of my org file, for example
#+property: ORG_TANGLE_DIRECTORY ../docs
After this the following works like a charm (at least so far):
:tangle (org-default-tangle-file-with-dir-from-property)
>> 3. Is it possible to tangle automatically on (every) export? I always
>> export, but I might forget to tangle, in which case export and tangle
>> would be out of sync.
>>
>
> I use the following hook to tangle on every save. I find it indispensable :)
>
> (add-hook 'org-mode-hook (lambda () (add-hook 'after-save-hook
> 'org-babel-tangle
> 'run-at-end 'only-in-org-mode)))
Good idea, I will explore this.
> Also, check out my free book "Literate Config", where I discuss some
> more tips about Literate Programming:
> https://leanpub.com/lit-config/read
Will do.
> Hope this helps,
Sure did. Thanks!
Jarmo
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2019-12-03 9:53 Babel: tangling questions Jarmo Hurri
2019-12-03 13:28 ` Diego Zamboni
2019-12-03 15:22 ` Jarmo Hurri
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