* tangle versus org-babel-load-file
@ 2018-04-03 12:54 Lawrence Bottorff
2018-04-03 16:16 ` Nick Dokos
0 siblings, 1 reply; 2+ messages in thread
From: Lawrence Bottorff @ 2018-04-03 12:54 UTC (permalink / raw)
To: emacs-orgmode Mailinglist
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I'm experimenting with Uncle Dave's config which is using a minimum init.el
to launch config.org, which is full of elisp babel source blocks. Here's
his relevant launching code:
(when (file-readable-p "~/.emacs.d/config.org")
(org-babel-load-file (expand-file-name "~/.emacs.d/config.org")))
However, I've seen this example:
(require 'org)
(require 'ob-tangle)
(org-babel-load-file (expand-file-name "~/.emacs.d/myemacs.org"))
which seems to want (require 'ob-tangle). The Uncle Dave setup is working
fine. I guess I don't know how it's tangling (which means running all the
code blocks in the org file, right?) without somehow being told to. But
then what is org-babel-tangle-file doing other than running all the code
blocks in a file? And then there's the :tangle yes parameter on an
individual code block. I'm missing something here. It seems
org-babel-load-file is creating a config.el from the config.org -- which is
a tangle behavior.
LB
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: tangle versus org-babel-load-file
2018-04-03 12:54 tangle versus org-babel-load-file Lawrence Bottorff
@ 2018-04-03 16:16 ` Nick Dokos
0 siblings, 0 replies; 2+ messages in thread
From: Nick Dokos @ 2018-04-03 16:16 UTC (permalink / raw)
To: emacs-orgmode
Lawrence Bottorff <borgauf@gmail.com> writes:
> I'm experimenting with Uncle Dave's config which is using a minimum init.el to launch config.org, which
> is full of elisp babel source blocks. Here's his relevant launching code:
>
> (when (file-readable-p "~/.emacs.d/config.org")
> (org-babel-load-file (expand-file-name "~/.emacs.d/config.org")))
>
> However, I've seen this example:
>
> (require 'org)
> (require 'ob-tangle)
> (org-babel-load-file (expand-file-name "~/.emacs.d/myemacs.org"))
>
> which seems to want (require 'ob-tangle). The Uncle Dave setup is working fine. I guess I don't know how
> it's tangling (which means running all the code blocks in the org file, right?) without somehow being
> told to. But then what is org-babel-tangle-file doing other than running all the code blocks in a file?
> And then there's the :tangle yes parameter on an individual code block. I'm missing something here. It
> seems org-babel-load-file is creating a config.el from the config.org -- which is a tangle behavior.
>
No, tangling does not run code blocks: it just writes them out to (one
or many) different file(s). org-babel-load-file calls
org-babel-tangle which is an autoloaded function, so when it is
called, emacs arranges to load the file that defines it
(i.e. ob-tange.el[c]). So you don't need to to (require 'ob-tangle)
separately. I presume the (require 'org) is also unnecessary because
you are loading the org-mode that is bundled with emacs which does that
automatically (but I haven't used the bundled org-mode in a long time,
so take this cum (the appropriately sized) grano salis).
--
Nick
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