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[O] tangle versus org-babel-load-file


From: Lawrence Bottorff
Subject: [O] tangle versus org-babel-load-file
Date: Tue, 3 Apr 2018 08:54:39 -0400

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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