Re: Show a warning/message when loading Org modules requiring external packages (was: :session for Julia in org babel?)

[Christopher M. Miles]

Ihor Radchenko <yantar92@gmail.com> writes:

> "Christopher M. Miles" <numbchild@gmail.com> writes:
>
>> What about write a elisp function to automatic the installation of those
>> required two Julia packages? If not, at least raise a warning for user
>> to install those two packages after detection not exist. WDYT?
>
> Installation is not a good idea because there are multiple alternative
> package managers in Emacs. Some of them explicitly require user to add
> code into init.el (I am referring to straight.el).
>
> However, we may, indeed, show some helpful warning/message.
>
> A reasonable place to implement such message is org-load-modules-maybe.
> It might catch the relevant errors and show the message.

I found ~org-load-modules-maybe~ load modules from ~org-modules~, it's a
list of ob-* or ol-* elisp modules. Not Julia modules. I searched
~org-load-modules-maybe~ function invocation code in org-mode source
code, have not relative examples. Don't know how to use
~org-load-modules-maybe~ to detect whether Julia modules exist and raise
helpful warning message.

>
> Patches are welcome!


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