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Re: [O] [RFC] [PATCH] ob-core.el: allow the auto-generation of output fi


From: Eric Schulte
Subject: Re: [O] [RFC] [PATCH] ob-core.el: allow the auto-generation of output file names for src blocks.
Date: Tue, 22 Apr 2014 21:35:16 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (gnu/linux)

>> Looks useful to me, but ":file png" looks wrong, with too much
>> implicit.  We should find something less confusing.
>
> One option would be to use :file-ext instead, to generate a :file
> parameter.  I didn’t go this route because autogenerating :file from
> other parameters seemed like too much magic.  But your points in the
> other direction are good.
>
> How does this sound as an algorithm:
> 1. if :file is present, behave exactly as we do now
> 2. if :file is absent but :file-ext and a #+name is present, generate a
>    :file parameter from :output-dir, the #+name, and :file-ext.
>

This sounds like a great approach to me.

>
> Open questions:
> 1. should :file-ext without a #+name be a no-op, or an error?

One option might be to borrow naming behavior from the comment
functionality in ob-tangle which looks like the following (from line 426
in ob-tangle.el).

(let (...
      (source-name
       (intern (or (nth 4 info)       ; explicit #+name:
                   (format "%s:%d"    ; constructed from header and position
                           (or (ignore-errors (nth 4 (org-heading-components)))
                               "No heading")
                           block-counter))))
      ...))

> 
> 2. should :output-dir apply to the :file case as well?
>

If you mean "should :output-dir be used as the base when :file is a
relative pathname" then I'd say "yes", and I think if this isn't the
current behavior then the current behavior should be changed.

Thanks for this nice patch,
Eric

>
> --
> Aaron Ecay
>

-- 
Eric Schulte
https://cs.unm.edu/~eschulte
PGP: 0x614CA05D



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