Re: New feature in project.el: Remembering the previously used projects

[Dmitry Gutov <dgutov@yandex.ru>]

On 30.05.2020 09:05, Simen Heggestøyl wrote:

>> The patch below mostly does that, except it misses the case when a
>> directory was selected from project-switch-project. [...]
> 
> Hm, I think it misses all cases when project-switch-project is used,
> since project-current will find the project using
> project--find-in-directory (project-switch-project already did the
> prompting part).

Yes, I mentioned that downside. See another patch I just posted.

> Maybe a simple solution could be to only write to the file when the
> addition caused the project list to change? I think it's a good change
> regardless, but is it enough to fix your issue, Kévin?

Seems like a good idea either way.

> Dmitry Gutov <dgutov@yandex.ru> writes:
> 
>> Alternatively, we could defer writing the file until Emacs is being
>> closed (and do that in kill-emacs-hook).
> 
> Maybe. I think doing it more eagerly has some advantages though if we
> can make it work:
> 
> - Launching a new Emacs session while another one is running will use
>    the latest project list.
> 
> - If there's any problem writing to the file I imagine it's better to be
>    notified about it up front rather than at the time Emacs is killed.

If that's your preference, let's go with it.

Note that the above downsides are common for other features that use 
kill-emacs-hook, so we're probably used to them. And I wouldn't say that 
the project list is really critical to avoid losing. So I'm fine with 
either.