Café Guix - "The guix time-machine and guix describe commands"

28 May 2024 from 1pm to 2pm

Visio

This session will be hosted by Marek Felšöci, post-doctoral researcher at INRIA and ICUBE on this link.
In Guix, software packages, including Guix itself, are made available through what are known as channels. Over time, the package offering in these channels evolves. Versions change, new Guix packages or features appear, others disappear. For example, in 2021 it was possible to ask Guix to create a software environment with the Inkscape package in version 0.92 using the command =guix environment --pure --ad-hoc inkscape@0.92=. In 2024, the channel in question no longer offered version 0.92 of Inkscape and the =guix environment= command was replaced by the new =guix shell= command.
In order to reuse the command line and recover the original software environment, we need to go back in time. Impossible? Not for Guix! At the next Café Guix, we'll be looking at how to use his time machine, the =guix time-machine= command. The channels, which are in fact versioned git repositories, make it possible to keep track of changes. If you have the list of channels and their respective commit numbers at the time, using =guix time-machine=, you can go back to exactly the right moment in 2021. Although it is possible to approximate the correct time marker a posteriori, it is preferable to keep track of it from the beginning. In this context, we'll also learn about the =guix describe= command.

As a reminder, Café Guix is a place and time for informal, French-speaking exchange around the Guix software environment manager. Students, researchers, system administrators, IT support staff from labs or computer centers - everyone is welcome to join us for this one-hour monthly meeting, where we can discuss questions raised by everyone about Guix and its use in the broadest sense.
You will find all the information concerning the "Cafés Guix" here : https://hpc.guix.info/events/2024/café-guix/.

Transparency to Sustain Open Science Infrastructure

“Transparency to Sustain Open Science Infrastructure” is a new project to be carried out by Université Grenoble Alpes, and implemented by the GRICAD unit.
The project is dedicated to the sustainability of Open science infrastructure (e.g. DOAJ, DOAB, OpenCitation, SoftwareHeritage, Dataverse and many more).
Read more...

MESONET

MESONET aims to meet the needs of researchers, university teachers and industry professionals by developing structured digital equipment. The main idea is to strengthen the structuring of national and regional offers in numerical simulation, high-performance computing (HPC), associated with artificial intelligence (AI) methods, as well as access to a Quantum SImulator (QLM) platform and quantum computing training. The primary objective is to set up a distributed regional infrastructure by integrating at least one mesocenter per region, established as references and regional relays. The infrastructure should have a significant impact on the adoption of national and regional digital infrastructure and AI by researchers.
The main goals of the project are available here.
Watch the presentation video.
In the MesoNET project, GRICAD will operate an cloud computing infrastructure based on Openstack. This contribution is supported by Université Grenoble Alpes.

Café Guix - "Introduction to G-exp"

30 April 2024 from 1pm to 2pm

Visio

This session will be hosted by Simon Tournier, research engineer at the Université Paris Cité on this link.
After reading the [« Package definition »] section, and after a few test/error iterations, we have to put #~(#$(% symbols here and there. This Café Guix will try to make them less cryptic. We'll be introducing a few ingredients from the Scheme/Guile toolbox (quote, quasiquote, unquote), which will lead us on to G-expressions.

As a reminder, Café Guix is a place and time for informal, French-speaking exchange around the Guix software environment manager. Students, researchers, system administrators, IT support staff from labs or computer centers - everyone is welcome to join us for this one-hour monthly meeting, where we can discuss questions raised by everyone about Guix and its use in the broadest sense.
You will find all the information concerning the "Cafés Guix" here : https://hpc.guix.info/events/2024/café-guix/.