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

Public Key

npub1xzfa3shpevdl74wwuvhq80ge24qpw34rlm93mfeh2yv265dn7rtq8l66cc

NIP-05 Address

[email protected]

Profile Code

nprofile1qqsrpy7cctsukxll2h8wxtsrh5v42sqhg63lajca5um4zx9d2xelp4spz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0ds93nskk

Publishing to

relay.damus.io

nos.lol

Author Public Key

npub1xzfa3shpevdl74wwuvhq80ge24qpw34rlm93mfeh2yv265dn7rtq8l66cc

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Published at

2026-07-27T17:54:28Z

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0 Metadata

Event JSON

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Last Notes

2026-06-19 07:17:58 UTC

Boris Brejcha is still the undisputed king 🤩

2026-06-09 07:31:29 UTC

https://medias.meow.social/media_attachments/files/116/718/979/264/622/296/original/4db8adfa108b0a4d.png

2026-06-05 18:59:44 UTC

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

2026-06-05 14:17:47 UTC

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

2026-06-05 07:59:11 UTC

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

2026-06-04 12:12:55 UTC

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 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 14:02:49 UTC

- reply

@nprofile…mcwl @nprofile…v673
I'd guess that
call zip#Browse(expand("%:p"))
should work if you've opened it and don't want to retype the file name

2026-06-02 06:58:57 UTC

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

2026-05-28 09:34:55 UTC

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@nprofile…mcwl
Woah, way better than usual for me!
www.maptap.gg May 28
98🎯 99🎯 92🎓 95🏆 95🏅
Final score: 951

2026-05-27 16:09:54 UTC

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

2026-05-26 09:14:48 UTC

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

2026-05-21 16:00:32 UTC

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:
{{ define "name" }}Hemera{{ end -}}
Hi {{= ({ name } | identity()).name }}!
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:
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() }}
╰╴ ++
Still not done yet, but slowly getting there.
#rustlang #rust

2026-05-20 07:39:59 UTC

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

2026-05-19 15:08:11 UTC

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 11:57:19 UTC

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

2026-05-04 07:18:11 UTC

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

2026-04-28 18:43:13 UTC

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

2026-04-28 18:17:22 UTC

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@nprofile…mcwl I am not using the desktop part, only server & web

2026-04-27 20:00:58 UTC

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 05:57:23 UTC

- reply

@nprofile…mcwl
www.maptap.gg April 27
95🏅 92🏆 76👏 51😔 45😨
Final score: 627
Ha!

2026-04-18 08:04:55 UTC

- reply

@nprofile…mcwl
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 12:50:53 UTC

"JSON died for our sins"

2026-04-09 06:29:24 UTC

- reply

@nprofile…mcwl
www.maptap.gg April 9
97🔥 99🎯 44😨 68😁 41😕
Final score: 611
Hehe :)

2026-04-07 06:52:34 UTC

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

2026-04-01 10:59:21 UTC

"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 13:17:22 UTC

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 12:51:09 UTC

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

2026-03-10 12:20:10 UTC

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@nprofile…mcwl 835 hehe :dragncool:

2026-03-09 19:05:59 UTC

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@nprofile…mcwl 772 💪 Hehe

2026-03-06 18:48:00 UTC

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@nprofile…mcwl Only 700 :C

2026-02-21 15:58:59 UTC

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

2026-02-21 08:54:05 UTC

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?

2025-12-19 19:42:01 UTC

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@nprofile…f7sz I am pretty sure you learned a lot in the process!

2025-10-14 12:52:03 UTC

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@nprofile…f7sz Du meinst doch Motorradschuppen oder?

2025-07-20 07:33:22 UTC

Every time I read an article about shortcoming of a tool, I wonder how much of that is ego and how much of it is an actual shortcoming?
Maybe it's a sign my perfectionism is going down, but different tools being imperfect in different ways does not make them bad or less useful?
Like, I just read an article about the #rust borrowchecker not being able to prove a valid program because it doesn't look 'through' functions. And this making it 'worse' in user experience.
And this feels fairly off to me. Sure the checker could try to do whatever you wish it did. But it doesn't, and so you have to adapt.
Like, not everything needs to fit what you expect from a tool I think.
It is fair to not use that tool (i.e. Rust) if you find that annoying, but I struggle hard with this mindset. Where rather than adapting to use a tool to its fullest, people just bang their head against it repeatedly saying "look how bad it is".
#rustlang

2025-06-20 12:39:59 UTC

Day Two #gpn23 Hope everyone is doing well!

2025-06-17 12:54:27 UTC

- reply

@nprofile…fe8t I don't see a difference in frequency either?
There's lots of small comments in the python code in the style of:
# Do the thing if empty
if foo is '':
do_thing()
Which I wouldn't consider to be prime examples for readability.
Don't forget also that you're looking at productive code, meant to be read by people who know Rust and the codebase.
The fact that Rust is also more expressive than Python when it comes to high-level constructs is ofc not helping if one doesn't know individual combinators by heart, but one can look them up!

2025-06-10 15:19:21 UTC

- reply

@nprofile…fe8t It's in the 'Explore' Tab at the bottom!

2025-06-10 14:05:12 UTC

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:
use strum::EnumMessage;
use strum_macros::EnumMessage;
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:
Had the derive feature of strum enabled
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)
Is a proc-macro ? (potentially irrelevant, potentially the missing piece)
So to me the full reproduction would be:
Have a dependency tree that contains both foo v0.1 (derive feature) and foo v0.2 (no features)
cargo update
It still builds
cargo hakari adds for both 'normal' deps and 'build' deps foo v0.2 (derive feature)
This causes cargo to unify foo for both normal builds and proc-macro builds
The build fails due to duplicate entries
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 08:39:42 UTC

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

2025-04-09 08:55:13 UTC

git push --force-with-lease truly is a lifesaver when working with multiple peeps on a branch

2025-04-08 10:38:32 UTC

The fact that XPath has support to serialize to JSON opens up a lot of amazing opportunities
👀
#xml #xpath #xee #rust #rustlang

2025-04-07 14:10:43 UTC

I love when people argue about C vs Rust and try to say "But I just want to be able to write down my code and not have to worry with all the baggage Rust forces on me" and I am always dumbfounded by it.
Am I the one interpreting it as too shallow? Because the way I see it, is that the moment you write non-trivial code most non-borrow-tracking languages will not be your friend when it comes to making sure that what you wrote actually does what you think it does.
Like, 'simple' Rust code is simple. And yes, a method being duck-typed is complex!! So of course your language should help you to make sure your actually articulate your constraints. It's the same with Typescript really. And also what people seem to dislike a lot about it.
To me, this is just intellectual laziness. Yes, you have to think about the interfaces of the different parts of your fundamentally maths-based creation!!
What do you think should be the case instead? If something is 'vibe coding' it should definitely be whatever these people think they are doing.
Like, it's the epitome of the bug-creation: You write a nice self-contained function, that reads some input and does things. Someone then adds features that make it non-threadsafe. Maybe sharing some references or w/e. This would just be a bug report in C, but of course Rust will complain that something is not Sync/Send and you should fix that! Does it suck you have to do that? NO cause you'd have to do it ANYWAY. Because it's just pure logic underneath.
I think that I should introduce Rust not as an alternative to C, but really what it is: "All those tools and analyses that people wish they'd have for C. That's why the syntax is somewhat adjacent."
Of course that's not true for either, but maybe it helps the framing, and one doesn't have to hear a complete BS reply of "Proper C with the correct tools is just as safe."

2025-03-28 10:35:16 UTC

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@nprofile…8j6a Ich denke, dass die Bank das nicht als 'personenbezogene Daten' sieht. Und daher nicht mitmacht.
Ob das so richtig ist, weiss ich nicht :D

2025-03-11 15:23:12 UTC

"MQTT is the JSON of the application architect"

2025-03-10 15:23:36 UTC

Using #git on a lower level than just commit+push feels like magic 🤩
I got told to clean my commits (they were right... :blobcatcry:)
So git rebase -i to the rescue! Edit the commit, re-commit the good parts, commit the other parts as needed, recombine the order, fixup/reword as needed, and voila!
Luckily it only took a few minutes, and if I broke something, I could always --abort or go to the reflog

2025-03-04 10:17:53 UTC

I finally got around what I've been wanting to do for quite some time!
@nprofile…8j6a and I have written a nix library to use cargo-dylint with #nix :blobcat:
The idea is to have the same experience as the default dylint, just reproducible.
It already works, but is a bit rough. The idea is to now heavily dog-food it and get it working easily, so that anyone can just add new lints through their nix config
:blob_cat_melt:
We're looking for input and ideas!
Repo: https://git.hemera.systems/Hemera/nix-dylint
Github Mirror: https://github.com/TheNeikos/nix-dylint (PRs still welcome)
#nix #nixos #rust #rustlang #dylint

2025-02-28 06:27:43 UTC

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@nprofile…ss2n @nprofile…vu7f the disabledModules needs to be a path to the module you wanna disable, not just the name. In the link I sent they show an example!

2025-02-27 10:34:54 UTC

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@nprofile…ss2n In that case I'd blacklist the nixpkgs module you patched, and import it from your fork

2025-02-27 10:26:52 UTC

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@nprofile…ss2n It depends on what patch you're interested in.
Did you change a package? If so, an overlay should be fine

2025-02-13 14:53:47 UTC

The Entry pattern in #Rust types is so incredibly powerful!
It's so fun to use
#rustlang

2025-02-11 11:52:56 UTC

Why is ING being such asses about their online access?
They now require a German phone number to login… which I don’t have nor needed ever.
It’s not my primary bank so w/e but???

2024-12-12 20:16:23 UTC

- reply

@nprofile…pf0n No idea what you're doing, but yes

2024-05-03 07:47:50 UTC

Had a small problem with #bevy, filed an issue, got approval on the proposed fix, sent a PR, had it merged. And all that under 6 hours!
Absolutely amazing. It really was a “small change”, but I know how those can quickly get bogged down. So good job to the maintainers!!

2023-11-17 09:10:17 UTC

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@npub1hg2…k372 Was wars denn?

2023-10-27 07:29:47 UTC

Everytime I get deeper than shallow understanding of EE, things just get fractally more complicated. And I have no idea how people get through this lmao
Love it

2023-10-06 15:10:10 UTC

To counterbalance my feed a bit:
I ❤️ #cargo #rust and its awesome to use every day! There have been so many nice usability changes over the years that its easy for me to forget them :D
A few I remember:
cargo check
cargo add
workspaces
workspace dependencies
So anyone who contributed to cargo in one way or another: Thank you very much!!

2023-07-13 07:59:42 UTC

I should ban parentheses from my normal writing. (Because it's literally just an added sentence (like this one), and it usually works just fine without them)