I keep learning a lot about Scheme hygienic macros and macroexpander and today we talked about using macro as identifiers in arbitrary position of s-expression, syntax parameters, variable transformers and identifier-syntax helper.

mpv https://youtu.be/KBO_VXVCWTo

I am at my first conference in perhaps 6 years -- #kubecon -- and I wonder if there are any fellow #guix users that might like talk about shared interests, perhaps related to #guile #scheme

Let me know!

On today's Crafter Hours stream, we'll continue working on porting over the Discourse Single-Sign On authentication that I implemented in JavaScript for another version of the System Crafters site.

Let's see how things look when we reimplement this in Guile Scheme!

Join us here:

- https://youtube.com/live/OFBCZ1uMBWk
- https://twitch.tv/SystemCrafters

I don't know why my #guile bindings for #gnome 's #libnotify just stopped working for no reason.

https://github.com/ekaitz-zarraga/guile-libnotify/issues/5

I opened this bug report in libnotify but it looks like the problems are in my code...
If anyone wants to help with this...

On today's Crafter Hours stream, I'll show some progress I made on hosting both the emacspackages site and the new Guile-backed System Crafters site on the same Guix server.

I kinda made a mess with it though, so we'll have to find our way out of that, too :)

Join us here:

- https://youtube.com/live/OITQtQnz9X8
- https://twitch.tv/SystemCrafters

Updated Guile-PNG to the version 0.8.0 in GNU Guix:
https://git.savannah.gnu.org/cgit/guix.git/commit/?id=53455b6b332022e4c46374051a37ff34f0110f72

Released Guile-PNG version 0.8.0:
https://github.com/artyom-poptsov/guile-png/releases/tag/v0.8.0

Main changes:
- New "png" CLI tool that prints human-readable information in org-mode format about the given PNG file.
- New "<square>" type in "(png graphics rectangle)" module.
- New "(png version)" module that provides procedures to get the information about the current Guile-PNG version.

Implemented "png" CLI tool for Guile-PNG (https://github.com/artyom-poptsov/guile-png) that prints the contents of a given PNG file (or the file coming from the standard input) to the standard output in org-mode format.

TIL: There is an identifier-syntax macro that you can use to implement syntax-id-rules or do other fancy macro stuff.

Online #Guix Social meetup in about 45 mins. Link for the call:

https://meet.jit.si/london-guix-meetup

Giacomo will be giving a talk about running services (#Forgejo in particular) in Guix's declarative configuration system, with Gocix. https://github.com/fishinthecalculator/gocix

See you in a bit!

/cc @futurile @paulbutgold
@forgejo

I'm not sure I can trace how I got there, but something had me playing around with GNU Guile (I've always liked the idea of an embeddable Scheme, I just never got around to looking at it closely).

Anyway, Guile is way cooler than I thought -- way more "unix-y" than other Schemes I've known.

But the real surprise was a static site generator -- Haunt (https://dthompson.us/projects/haunt.html) -- and a full-blown web framework -- Artanis (https://artanis.dev/)!

I am so glad both of these things exist.

My small overview of "JRM’s Syntax-rules Primer for the Merely Eccentric" paper about Scheme macros and useful tricks for writing them. Difficulty: medium-easy.

mpv https://youtu.be/A2vi3vQ15kM

Paper:
- http://www.phyast.pitt.edu/~micheles/syntax-rules.pdf
- https://hipster.home.xs4all.nl/lib/scheme/gauche/define-syntax-primer.txt

Spoiler: at the end of the paper a minimal scheme evaluator implemented purely with macros.

#guix social talk this week by @paulbutgold on self-hosting @forgejo using #oci / #docker #containers

His Gocix project brings the power of declarative configuration to running container services.

Details on the Wiki or register at the Meetup:

- https://libreplanet.org/wiki/Group:Guix/GuixSocial

- https://www.meetup.com/guix-social/events/306340848/

@fnat

It's double #GuixSocial absolute fun this week! #SaveTheDate

- Wed 26th March 6pm GMT: remote event with a *fantastic* talk (details to be revealed soon!)

- Fri 28th March 6pm GMT: in-person event in #London (EC4A 4AB). Join us for an evening of #Guix, #Guile, and Free Software hacking and chit-chat. Bring your own device if you fancy demoing something or for some hands-on hacking.

More info: https://libreplanet.org/wiki/Group:Guix/GuixSocial

/cc @futurile

TIL: There is a syntax-error macro and it throws exception at expand time, rather than runtime. This is really useful to make macro fail early and prevent oopsies during the program execution.

341 Spahr Street, #Pittsburgh Pennsylvania. In 1991–92 Chris Paris and I lived on the first floor apartment in our fourth year at Carnegie Mellon.

Tom Lord lived on the third floor that year, decamping for Berkeley before the lease was up. What a great neighbor and a sweet guy. We knew he was a #Lisp hacker and a #Gnu guru...

Only much later did I learn that our neighbor Tom Lord was the father of #Guile! And sadly that he passed away, far too young, in 2022.

https://berkeleydailyplanet.com/issue/2022-06-26/article/49837

Look at what is coming to Scheme ecosystem:

https://nlnet.nl/project/SchemeTestingFramework