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From: Ihor Radchenko <yantar92@posteo.net>
To: lin Sun <sunlin7@yahoo.com>
Cc: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>,
	Timothy <tecosaur@gmail.com>, Bastien Guerry <bzg@gnu.org>
Subject: Re: [PATCH] before emit an error message, try to load the babel language
Date: Tue, 25 Apr 2023 08:12:57 +0000	[thread overview]
Message-ID: <87zg6ws7li.fsf@localhost> (raw)
In-Reply-To: <CABCREdpM3wxJEzNwsUg+xv4sfOg3hN25Oyzq0a_Qe9QcGuOmyQ@mail.gmail.com>

lin Sun <sunlin7@yahoo.com> writes:

> Thanks for the comment.
> If we switch to the `add-variable-watcher', it seems we'll load the
> ob-LANG in the callback immediately.
> The previous change can lazyly load the babel languages until the user
> tries to evaluate the source block.

Is there any advantage doing the loading lazily?
I can only see disadvantages:

1. `setopt' already triggers loading when variable is set. It is just
   `setq', often used in place of `setopt', that does not trigger
2. Lazy loading like you proposed will have to be added in a number of
   places, not just when executing src block: `org-edit-special',
   `org-src-associate-babel-session', `org-edit-src-code',
   `pcomplete/org-mode/block-option/src', org-lint,
   `org-babel-tangle-single-block', `org-babel-exp-src-block',
   `org-babel-exp-results', and others.
3. We will also have to monitor newly added babel functions to take care
   about lazy loading. Not to mention third-party code.

Admittedly, (2) can be solved by abstracting babel backend queries to
API. (I have a WIP code doing exactly this). However, I still see no
good reason to make `setq' different from what `setopt' does now.
Most people treat them interchangeably and then get surprised by the

Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>

  reply	other threads:[~2023-04-25  8:11 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <388850760.3644614.1634354740816.ref@mail.yahoo.com>
2021-10-16  3:25 ` Subject: [PATCH] Fix DISPLAY error on exporting org with plantuml to html Sun Lin
2021-10-18  1:39   ` Sun Lin
2021-10-18  5:07     ` Bastien Guerry
2021-10-20 12:02       ` Sun Lin
2021-11-18  5:42         ` Sun Lin
2021-11-18  7:38   ` Timothy
2021-11-18  7:47     ` Sun Lin
2021-11-30  1:41       ` Sun Lin
2021-11-30  4:18         ` Timothy
2021-11-30  6:05           ` Sun Lin
2022-06-07  5:48             ` lin Sun via General discussions about Org-mode.
2022-06-07  6:34               ` Dr. Arne Babenhauserheide
2022-06-07 14:49                 ` Max Nikulin
2022-06-07 15:30                 ` lin Sun
2022-06-08  1:45               ` Ihor Radchenko
2022-06-08  4:35                 ` lin Sun
2023-04-22  7:21                   ` [PATCH] before emit an error message, try to load the babel language lin Sun
2023-04-22  8:25                     ` Ruijie Yu via General discussions about Org-mode.
2023-04-22 12:45                     ` Ihor Radchenko
2023-04-23  6:19                       ` lin Sun
2023-04-23  7:45                         ` Ihor Radchenko
2023-04-25  2:50                           ` lin Sun
2023-04-25  8:12                             ` Ihor Radchenko [this message]
2023-04-25 14:30                               ` Ruijie Yu via General discussions about Org-mode.
2023-04-25 14:48                                 ` Ihor Radchenko
2023-04-26  2:33                                   ` Ruijie Yu via General discussions about Org-mode.
2023-04-26  4:15                                     ` lin Sun
2023-04-26  7:00                                       ` Ihor Radchenko
2023-04-26 16:43                                         ` lin Sun
2023-04-26 16:59                                           ` Ihor Radchenko
2023-04-26  6:59                                     ` Ihor Radchenko

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