Hemera :nixos: :ms_snow_leopard:

Computer Cat with a love for Rust, Linux and creating infrastructure!

Feel free to reply to all the posts you can see :D

Or send me a direct message!

Interests:
- Infrastructure Programming
- Gamedev
- Playing with the coolest tech (Rust 🦀 + Nix ❄️)
- Furry Stuff (Art, Fursuits, Games)

Feline fine! :ms_snow_leopard:

PFP by Shwonky

Header image done by DelKoral

Website: https://hemera.systems/about
Github: https://github.com/TheNeikos/
Species: Snow Leopard
Matrix: Hemera :nixos: :ms_snow_leopard: (npub1yz9…m8ec):matrix.hemera.systems
Technologies: [#rustlang](https://meow.social/tags/rustlang ) [#nix](https://meow.social/tags/nix )
Enby?: Yes
Pronouns: Whatever makes you comfortable interacting with my pfp

Public Key

npub1yz9vzg68z9quqmuyf0uecmexdmwal9klamjmv6v5nfdy58xnq2fqfvm8ec

NIP-05 Address

[email protected]

Profile Code

nprofile1qqszpzkpydr3zswqd7zyh7vudunxahwljm07aedkdx2f5kj2rnfs9ysprpmhxue69uhhyetvv9ujumt0d4hhxarj9ecxjmnttv02tk

Publishing to

relay.momostr.pink

Author Public Key

npub1yz9vzg68z9quqmuyf0uecmexdmwal9klamjmv6v5nfdy58xnq2fqfvm8ec

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Published at

2026-07-06T00:29:51+02:00

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0 Metadata

Event JSON

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Last Notes

2026-06-05 20:59:44 CEST

My laptop says:<code>POWER_SUPPLY_CHARGE_FULL_DESIGN=9600000 POWER_SUPPLY_CHARGE_FULL=6161000 </code>
Hmmm, time to get a new battery? 😿

2026-06-05 16:17:47 CEST

#gpn24 #gpn #soundshappen
https://medias.meow.social/media_attachments/files/116/697/925/370/219/733/original/ca1ad41439a171d1.png

2026-06-05 09:59:11 CEST

5 sneezes in 3 seconds around me, a new record?
#gpn24

2026-06-04 14:12:55 CEST

If anyone at #gpn wants to chat about a gamedev project in bevy, I'm looking to team up with someone!
It's currently something like [KOHCTPYKTOP](https://www.zachtronics.com/kohctpyktop-engineer-of-the-people/ ) but with CMOS! So if you always wanted to learn either #bevy, chat about it or are interested, talk to me!
#gpn24 #bevy #rustlang #rust

2026-06-02 08:58:57 CEST

Guess the programming language...
#rust #rustlang
https://medias.meow.social/media_attachments/files/116/679/213/365/017/818/original/42ae2b65360d7121.png

2026-05-29 08:33:12 CEST

You don't understand your codebase from 6 months ago.
Do you...

2026-05-28 11:34:55 CEST

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Woah, way better than usual for me!
[www.maptap.gg](http://www.maptap.gg ) May 28
98🎯 99🎯 92🎓 95🏆 95🏅
Final score: 951

2026-05-27 18:09:54 CEST

Anytime I listen to techno mixes that aren't from Brejcha or Miss Monique I quickly put them back on lol

2026-05-26 11:14:48 CEST

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https://www.youtube.com/watch?v=jN5mICXIG9M
There you go :D

2026-05-21 18:00:32 CEST

So I've been hacking on #nomo, my templating library. And its starting to take shape!
I'm testing more and more esoteric stuff, and I'm happy with the features I have!
Here's a fairly convoluted example of things one can do:<code>{{ define "name" }}Hemera{{ end -}} Hi {{= ({ name } | identity()).name }}! </code>
Where identity is a user-defined function that takes its input and spits it back out again of course :neocat_happy:
I'm also putting a lot of care into the error messages:<code>error: Tried to apply an argument to a non-function ╭▸ 1 │ {{= "foo" | bar }} │ ━━━━━━━━━━━ │ ╰ help: Maybe you forgot to add parentheses? note: Try adding it ╭╴ 1 │ {{= "foo" | bar() }} ╰╴ ++ </code>
Still not done yet, but slowly getting there.
#rustlang #rust

2026-05-20 09:39:59 CEST

Greg Kroah Hartman: “Rust is going to save Linux”
To all the naysayers :)
#rustweek

2026-05-19 17:08:11 CEST

Please spend those two minutes doing a bad photoshop rather than using some genslop in your slides
It’s 10x better and most likely funnier as well
#rustweek

2026-05-19 13:57:19 CEST

Day one of #rustweek and it's been fun so far!
Shame that slop is still present though
:neocat_sad:

2026-05-04 09:18:11 CEST

Things you don't want to hear when you put on music: "Low battery, please recharge headset"
😿 :revblobfoxcry:
*tantrum*

2026-04-28 20:43:13 CEST

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Ye weird, I just checked, it 'works' in the desktop app, but is really weirdly displayed. Way too small etc..

2026-04-28 20:17:22 CEST

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I am not using the desktop part, only server & web

2026-04-27 22:00:58 CEST

Well, it took a few weeks but I feel I finally understand how dioxus wants you to build a full stack app. And now implementing things is waaay easier and fun!
#rustlang #rust #dioxus

2026-04-27 07:57:23 CEST

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[www.maptap.gg](http://www.maptap.gg ) April 27
95🏅 92🏆 76👏 51😔 45😨
Final score: 627
Ha!

2026-04-18 10:04:55 CEST

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[www.maptap.gg](http://www.maptap.gg ) April 18
94🏅 97🔥 88🎉 98🎯 18🥺
Final score: 715
Fah
I mixed up Cambodia with another country lmao

2026-04-17 14:50:53 CEST

"JSON died for our sins"

2026-04-16 09:06:51 CEST

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[www.maptap.gg](http://www.maptap.gg ) April 16
76🌞 88🎉 96🔥 61🫢 72🤗
Final score: 755
Argentina being long makes it 10x harder grr

2026-04-13 10:26:39 CEST

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[www.maptap.gg](http://www.maptap.gg ) April 13
94🏅 88🎉 83😁 77👏 90👑
Final score: 849
:C

2026-04-09 08:29:24 CEST

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[www.maptap.gg](http://www.maptap.gg ) April 9
97🔥 99🎯 44😨 68😁 41😕
Final score: 611
Hehe :)

2026-04-08 08:33:18 CEST

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[www.maptap.gg](http://www.maptap.gg ) April 8
94🏅 91👑 91👑 94🏅 98🔥
Final score: 943

2026-04-07 08:52:34 CEST

My morning read: "The authors reserve the right to change the specification without notice."
Time for a second coffee :neocat_woozy:

2026-04-01 12:59:21 CEST

"Hey, this service is returning things that aren't in the spec"
"Yeah, that's still being worked on"
"Ok, but its in production?"
"Yeah, we are just slow writing the spec."
??????
:neocat_facepalm:

2026-03-30 15:17:22 CEST

The official #nixos branding guide says "Do not place the logo on a cake"
:dragnsad: 🍰
https://medias.meow.social/media_attachments/files/116/318/313/746/028/333/original/c23219a4f9a1cb46.png

2026-03-25 13:51:09 CET

Seen: "Inconsistent precision on your display"
What was displayed: 0.0.17, the version number
😭 😭
How many decimals do you use for your version number :DDD

2026-03-18 19:22:11 CET

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[www.maptap.gg](http://www.maptap.gg ) March 18
99🎯 96🔥 90👑 94🏅 43😞
Final score: 786
Noooooooo the last one :CCCC

2026-03-10 13:20:10 CET

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835 hehe :dragncool:

2026-03-09 20:05:59 CET

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772 💪 Hehe

2026-03-07 15:08:20 CET

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So many American cities zzzz
Only 800 :c

2026-03-06 19:48:00 CET

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Only 700 :C

2026-02-21 23:51:55 CET

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I mean, you can stream it yourself :)

2026-02-21 16:58:59 CET

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No this is 100% valid, SQLite can be faster than using files as well :D

2026-02-21 09:54:05 CET

I wish SQLite had a 'modern dummy preset' that is versioned, such that it enables all the settings that one would want to have, but are not set due to backwards issues otherwise.
Stuff like references, but also more obscure settings like "unicode61" tokenizer wrongly handling diacritics unless you set some setting to '2' :D
One would create a connection, and send it as the first pragma. And wouldn't change it unless one is ready to accept the potential breaking change.
Oh well, maybe there is a resource somewhere that lists all the settings/pragmas one should set upon starting an SQLite connection, such that it behaves more like what one might expect?

2026-02-06 11:25:53 CET

Nothing like actually typing out: systemctl enable backdoor
:dragncool:

2026-02-02 16:22:16 CET

Why is rustdoc so slow? I feel like it wasn't that slow 'before'. (I don't have a cutoff, but I built docs for projects like these before, and it did not take half an hour lmao)
Sure it was 800 crates (Most of which are crates I don't build, so I assume they are crates for other platforms) but 25 minutes ?? And most of it seemingly single-threaded? On a 12-core processor!
This is on rustdoc 1.91.0
#rustdoc #rustlang #rust

2026-01-27 09:16:46 CET

A little #mqtt quiz:
Can a topic filter be longer than a topic it matches?
For example kitchen/+/state is a topic filter.
And kitchen/light/state is a topic.

2025-12-21 17:36:11 CET

Well, just had a fun moment
Programs refused to start, etc... a symptom of I think a read-only cache or w/e and thus blocking interactions.
Rebooted, and see a kernel panic a few minutes earlier from when I first noticed it. I didn't see a journal message about anything being mounted r-o, but if the driver crashed that handled the disk then I guess it's the same.
Either way, I still have the kernel logs etc and am willing to share if they are of any use.
The only thing in there tho is:<li>17:01:22: 277 callbacks suppressed </li><li>17:01:22: steamwebhelper segfault</li><li>17:01:22 timesynd contacts ntp server</li><li>17:01:24 kernel NULL pointer deref < several stack traces ></li>
And it then noticed that a there is a stall.
🤷 Bug? For what its worth, I last updated two weeks ago. Or cosmic rays? :D
Anyway, is this of any use if I post it somewhere or is it just noise? I didn't really do anything at that moment, so I have no idea how to reproduce it ( 🙏 that I don't lmao)

2025-12-19 20:42:01 CET

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I am pretty sure you learned a lot in the process!

2025-10-14 14:52:03 CEST

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Du meinst doch Motorradschuppen oder?

2025-10-01 15:29:41 CEST

OH: “After several weeks of work, I can now define functions! We don’t have numbers yet tho”

2025-07-23 08:35:22 CEST

Me vs the guy she tells you to not worry about
https://medias.meow.social/media_attachments/files/114/901/157/070/641/812/original/5daf76dbaf35e0b3.jpeg

2025-07-17 16:29:57 CEST

I remember a time when I was happy to read something on Medium, but nowadays its just a really bad experience :c

2025-06-24 11:00:09 CEST

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allowing myself to butt in, since I have been eyeing for annex to handle my media library. :neodog_floof_cute_tail:
Reading though git-annex-export it seems that it causes an “as is” file export from a remote? Aka something a “normal” application could interact with? (Aka a Jellyfin?)
Does it do this through physical files? Or could they be on-demand?

2025-06-20 14:39:59 CEST

Day Two #gpn23 Hope everyone is doing well!

2025-06-10 16:05:12 CEST

Just ran into an interesting #cargo #rustlang workflow problem, that I am not sure how it is best avoided?
A project I work on is depending on strum and strum_macros. Due to a cargo update multiple strum versions now got unified, and only a single version is built. That's good.
A dependency I was using had a pattern as such:<code>use strum::EnumMessage; use strum_macros::EnumMessage; </code>
Which is totally fine!
With the unification, the features now also got unified. Which in this case meant that EnumMessage is now present in the macro-scope in both strum and strum_macros.
Which means the above two lines cause an error with EnumMessage being imported twice! Fun.
So the situation is that strum is fine, as it is an additive feature. And the dependency is fine as well, as it itself doesn't use the 'derive' feature.
Another reason why this happens seems to be because we are using cargo-hakari to have less cache-misses in our workspace. But once our workspace-hack crate added the derive feature it broke the build.
The final piece seems that a transitive dependency both:<li>Had the <code>derive</code> feature of strum enabled</li><li>Did a 0.x.y release (aka minor? patch?) that had a major update of its dependencies in it. (i.e. 0.26 -> 0.27)</li><li>Is a proc-macro ? (potentially irrelevant, potentially the missing piece)</li>
So to me the full reproduction would be:<li>Have a dependency tree that contains both <code>foo v0.1 (derive feature)</code> and <code>foo v0.2 (no features)</code></li><li><code>cargo update</code></li><li>It still builds</li><li><code>cargo hakari</code> adds for both 'normal' deps and 'build' deps <code>foo v0.2 (derive feature)</code></li><li>This causes cargo to unify <code>foo</code> for both normal builds and proc-macro builds</li><li>The build fails due to duplicate entries</li>
It feels like the use of cargo-hakari caused this situation, as without it, it would have been fine I guess? But adding a feature flag, shouldn't break downstream crates either 😿 so bleh

2025-06-09 11:17:05 CEST

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https://medias.meow.social/media_attachments/files/114/652/649/982/282/961/original/7cfc06fd028d89f5.png

2025-06-09 11:15:12 CEST

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It's from libqalculate, and you can use it to do unit maths!

2025-06-09 10:39:42 CEST

For those that don't know, qalc is amazing!

2025-05-15 19:31:14 CEST

Welcome to the World #rust 1.87.0!
https://medias.meow.social/media_attachments/files/114/513/036/618/589/659/original/6406b848fd7df7dc.jpeg

2025-05-14 15:46:07 CEST

Oh #zed supports #vim mode?
But does it run in the terminal? 🤔

2025-05-06 15:03:12 CEST

German politicians have the potential to do something really funny twice in a row

2024-08-24 18:30:00 CEST

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That was also my first thought haha

2024-08-18 19:55:00 CEST

I love how I learn about critical firmware fixes for my SSD, after it died 😿
Thank you modern world