[QGIS-Developer] Processing: questions on temporary files

[Nyall Dawson]

On Wed, 4 Dec 2019 at 21:21, Alexander Bruy <alexander.bruy at gmail.com> wrote:

> > In my opinion, the term "Create temporary layer", from a user perspective, doesn't necessarily mean "Create Memory layer". A temporary layer could also be stored in disk.

Right, hence the recent change to also expose warnings for files
stored in /tmp folders...

>
> I think this wording is historical thing. Previously Processing was
> using real temporary files
> to store intermediate and final outputs. When developing QGIS 3.0 we
> have switched to
> memory layers but have not adjusted this placeholder text.

It's also because we don't expose anywhere in the QGIS GUI the term
"memory layer". That's an internal, code detail. Everything in QGIS
app refers to these as "temporary scratch layers".

Nyall