bug#33370: Cuirass: Trigger 'guix publish' baking

["Clément Lassieur" <clement@lassieur.org>]

Ludovic Courtès <ludo@gnu.org> writes:

>>> This would be useful in reducing latency; the downside is that we’d bake
>>> lots of things, even possibly things that nobody ever needs.
>>>
>>> Thoughts?
>>
>> What about getting the first user to block until the baking is done?
>
> That’s generally not possible because HTTP is supposedly synchronous.
> Also, ‘guix publish’ has a bunch of worker threads that pick baking
> tasks from a queue.  When the queue is empty and you asking for a
> substitute of sed, it will take seconds to bake it; but when the queue
> is already large and you’re asking for LibreOffice, it could take a few
> minutes.
>
> For the intended use case, which is a build farm with many users,
> optimizing for the first user makes little sense IMO.

I don't agree, because I find it stressful when you build something and
you're not 100% sure you'll get the substitute.  If someone is the only
user of several Guix packages (and I think it's the case for many of our
users), they'll have to re-build them locally every time one of their
dependencies is updated.

So if I understand well, the Cuirass solution seems the best...  I leave
the bug open but I change the name :-)

Thank you,
Clément