From: Matt Price <moptop99@gmail.com>
To: John Kitchin <jkitchin@andrew.cmu.edu>, Org Mode <emacs-orgmode@gnu.org>
Subject: Re: creating new #+KEYWORD: variables
Date: Thu, 15 Nov 2018 07:15:16 -0500 [thread overview]
Message-ID: <CAN_Dec-cJTGQwZvmt=WsHNxbsoX53_Utn+g5G=96Q78-eBZEvA@mail.gmail.com> (raw)
In-Reply-To: <87r2fsbvz2.fsf@nicolasgoaziou.fr>
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On Sat, Nov 10, 2018 at 1:58 PM Nicolas Goaziou <mail@nicolasgoaziou.fr>
wrote:
> Hello,
>
> John Kitchin <jkitchin@andrew.cmu.edu> writes:
>
> > You can retrieve keywords in the org-file like this:
> >
> > (defun get-keyword (key)
> > (org-element-map (org-element-parse-buffer) 'keyword
> > (lambda (k)
> > (when (string= key (org-element-property :key k))
> > (org-element-property :value k)))
> > nil t))
>
> As a minor addendum,
>
> (org-element-parse-buffer 'element)
>
> is more efficient in this case.
>
> An even more efficient way to retrieve keywords, assuming buffer is not
> already parsed, would be:
>
> (org-with-point-at 1
> (let ((case-fold-search t)
> (regexp (format "^[ \t]*#\\+%s:" key))
> (result nil))
> (while (re-search-forward regexp nil t)
> (let ((element (org-element-at-point)))
> (when (eq 'keyword (org-element-type element))
> (push (org-element-property :value element) result))))
> result))
>
> This is very helpful, Nicolas and John.
What about *setting* a global keyword? I would like to write something like
this:
(defun org-lms-set-global-prop-value (key value)
"Add or update keyword KEY in the org file header."
(save-excursion
(goto-char (point-min))
(insert (format "#+%s: %" (upcase key) value))))
But
(a) insert the value at the *end* of the headers section, not the
beginning.
(b) preferably replace any existing values of the keyword rather than write
a whole new line.
(b) I guess could be achieved with something like
(replace-regexp (format "\(^[ \t]*#\\+%s: \)\(.*\)" key) (concat "\1"
value))
But what about (a)? I thought org already had a couple of functions that
performed this kind of serach but now I'm not so sure.
> Regards,
>
> --
> Nicolas Goaziou
>
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next prev parent reply other threads:[~2018-11-15 12:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-09 3:32 creating new #+KEYWORD: variables Matt Price
2018-11-09 9:29 ` Diego Zamboni
2018-11-10 2:24 ` Matt Price
2018-11-10 7:22 ` Nicolas Goaziou
2018-11-10 16:17 ` Matt Price
2018-11-10 17:11 ` John Kitchin
2018-11-10 18:58 ` Nicolas Goaziou
2018-11-15 12:15 ` Matt Price [this message]
2018-11-15 19:51 ` John Kitchin
2018-11-12 9:11 ` Diego Zamboni
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