Rust Programming

So, apparently the chrome/geckodriver processes will terminate on their own if the user sends ctrl+c to the console. It will not terminate on its own if the program finishes running naturally.

If you're interested in terminating it on your own, like I also was, here is how I went about it.

use std::process::{Child, Command};

fn main() {
	let mut s = Server::default();
	s.start();
	s.shutdown();
}

struct Server {
	child: Option<Child>
}

impl Default for Server {
	fn default() -> Self {
		Self {
			child: None
		}
	}
}

impl Server {
	fn start(&mut self) {
		self.child = Some(Command::new("./chromedriver")
			.spawn()
			.expect("ls command failed to start"));
	}

	fn shutdown(&mut self) {
		input(None); // wait for input so you can observe the process
		self.child.as_mut().unwrap().kill();
		self.child.as_mut().unwrap().wait();
		println!("shutdown");
	}
}

pub fn input(prompt: Option<String>) {
	let mut input = String::new();
	match prompt {
		Some(prompt) => println!("{}", prompt),
		None => ()
	}
	io::stdin().read_line(&mut input).expect("Failed to read input");
}

The May edition of "This Month in Rust GameDev" has just landed!.

With it, we also released a statistical analysis of the survey we ran last month. Thank you very much to the 52 readers who gave us their feedback on how to improve the newsletter! You rock!

This is also your call for submissions. Got a game you're tinkering on? A crate for fellow game devs? Do you want to share a tutorial you've made? Are you excited about a new feature in your favorite engine? Share it with us! You can add your news to this month's WIP newsletter and mention the current tracking issue in your PR to get them included. We will then send out the newsletter at the start of next month.

Happy coding ✨

I’m wondering if anyone knows knows of something like stylelint written in rust? I’ve done some searching but can’t find it, but I feel like it must exist in some form.

I’m switching over to Biome from eslint due to the massive speed improvements and I want to do the same with stylelint.

The autocompletion works (mostly) but for example Vec::new() doesn't highlight anything at all. I do get errors when not putting a semicolon, but things like passing too many arguments into the println macro doesn't throw an error. Or how shown in this example, it did not autocomplete the clone method, while also just accepting .clo; at the end of a String (it also didn't autocomplete "String"). In the video I show how it also gives me a recommendation for setting vec![] as a type, which doesn't make any sense. It only seems to a very limited selection of methods and some words I already used in the script. Is this how it's supposed to be, or do I have some very old version perhaps?

EDIT: Look in description for the fix

cross-posted from: https://slrpnk.net/post/9960845

Hello Lemmy! Yesterday I released the first version of an alternative frontend for Threads: Shoelace. It allows for fetching posts and profiles from Threads without the need of any browser-side JavaScript. It's written in Rust, and powered by the spools library, which was co-developed between me and my girlfriend. Here's a quick preview:

The official public instance (at least for now) is located at https://shoelace.mint.lgbt/, if y'all wanna try it out. There's also instructions to deploy it inside the docs you can find in the README. Hope y'all enjoy it!

rustc will use rust-lld by default on x86_64-unknown-linux-gnu on nightly to significantly reduce linking times.

I’m working on a big project in #Rust, there is toolset and API for #Playdate.

All going great, moving to stabilization step by step, but I’m tired of looking at the dull 90⭐️. Seriously, could you please throw me into the trends of the github, please! ❤️‍🔥

Project repository, mastodon.

The April edition of "This Month in Rust GameDev" has just landed!.

You may have noticed that this marks the first release since quite a while. To revive the newsletter, we made some organisational changes.
We want to continue improving the project, so we've put together a survey for you to tell us how the newsletter should evolve. We'd be happy if you filled it out and / or shared it with your fellow game devs 🙂

This is also your call for submissions for May's edition!

Happy coding ✨

I just released v0.1.0 of hinoki, my static site generator :)
The README.md should explain usage, and you can also see how I ported my blog to it here.

This project started because I'm not entirely happy with Zola, which does not support customizing page paths much (e.g. /year/month/day/title/index.html style paths) and made some other design decisions that I wanted to explore alternatives to.

You can download the binary from GitHub releases, or cargo install it from git.

Any feedback is appreciated, here or in the GitHub issues!

The Rust gamedev working group's newsletter "This Month in Rust GameDev" has been rebooted, starting this April 🎉

This is your call for submissions. Got a game you're tinkering on? A crate for fellow game devs? Do you want to share a tutorial you've made? Are you excited about a new feature in your favorite engine? Share it with us! You can add your news to this month's WIP newsletter and mention the current tracking issue in your PR to get them included. We will then send out the newsletter at the start of next month.

Happy coding!

https://doc.rust-lang.org/book/ links to a site that's charging an absurd $40 for ebook format.

Where can we download it for free?

So I want to update the sprite so my character looks in a different direction each time the player presses left/right, how could I do this? I can't do it in the setup fn, since it's a startup system, appreciate any help

EDIT: changed formating

here is my code:

use bevy::prelude::*;

`fn main() {
    App::new()
        .add_plugins(DefaultPlugins.set(ImagePlugin::default_nearest())) // prevents blurry sprites
        .add_systems(Startup, setup)
        .add_systems(Update, animate_sprite)
        .add_systems(Update, player_movement_system)
        .run();
}

const BOUNDS: Vec2 = Vec2::new(1200.0, 640.0);
static mut FLIP_BOOLEAN: bool = false;

fn set_flip_boolean(boolean: bool) {
    unsafe {
        FLIP_BOOLEAN = boolean;
    }
}

fn get_flip_boolean() -> bool{
    unsafe {
        FLIP_BOOLEAN
    }
}

#[derive(Component)]
struct Player {
    movement_speed: f32,
}

#[derive(Component)]
struct AnimationIndices {
    first: usize,
    last: usize,
}

#[derive(Component, Deref, DerefMut)]
struct AnimationTimer(Timer);

fn animate_sprite(
    time: Res<Time>,
    mut query: Query<(&AnimationIndices, &mut AnimationTimer, &mut TextureAtlas)>,
) {
    for (indices, mut timer, mut atlas) in &mut query {
        timer.tick(time.delta());
        if timer.just_finished() {
            atlas.index = if atlas.index == indices.last {
                indices.first
            } else {
                atlas.index + 1
            };
        }
    }
}


fn setup(
    mut commands: Commands,
    asset_server: Res<AssetServer>,
    mut texture_atlas_layouts: ResMut<Assets<TextureAtlasLayout>>,
) {
    let texture = asset_server.load("sprites/Idle01.png");
    let layout = TextureAtlasLayout::from_grid(Vec2::new(64.0, 40.0), 5, 1, None, None);
    let texture_atlas_layout = texture_atlas_layouts.add(layout);
    let animation_indices = AnimationIndices { first: 0, last: 4 };
    let boolean = get_flip_boolean();
    commands.spawn(Camera2dBundle::default());
    commands.spawn((
        SpriteSheetBundle {
            texture,
            atlas: TextureAtlas {
                layout: texture_atlas_layout,
                index: animation_indices.first,
            },
            
            ..default()
        },
        Player {
            movement_speed: 500.0,
        },
        animation_indices,
        AnimationTimer(Timer::from_seconds(0.1, TimerMode::Repeating)),
    ));
}

fn player_movement_system(
    time: Res<Time>,
    keyboard_input: Res<ButtonInput<KeyCode>>,
    mut query: Query<(&Player, &mut Transform)>,
) {
    let (guy, mut transform) = query.single_mut();

    let mut movement_factor = 0.0;

    let mut movement_direction = Vec3::X;

    if keyboard_input.pressed(KeyCode::ArrowLeft) {
        movement_factor -= 1.0;
        movement_direction = Vec3::X;
        set_flip_boolean(true);
    }

    if keyboard_input.pressed(KeyCode::ArrowRight) {
        movement_factor += 1.0;
        movement_direction = Vec3::X;
        set_flip_boolean(false);
    }

    if keyboard_input.pressed(KeyCode::ArrowUp) {
        movement_factor += 1.0;
        movement_direction = Vec3::Y;
    }

    if keyboard_input.pressed(KeyCode::ArrowDown) {
        movement_factor -= 1.0;
        movement_direction = Vec3::Y;
    }


    let movement_distance = movement_factor * guy.movement_speed * time.delta_seconds();
    let translation_delta = movement_direction * movement_distance;
    transform.translation += translation_delta;

    let extents = Vec3::from((BOUNDS / 2.0, 0.0));
    transform.translation = transform.translation.min(extents).max(-extents);
}

Been working on this a few months. It's inspired by previous generations of parser generators, and by my own previous work generating ast lexers from grammar files. This integrates seamlessly with the type system, allowing you to declare your syntax, extract only the data you want as variables, and evaluate them easily. And just from a simple description of your syntax, you'll get beautiful errors which visually point out structures in the input.

With this I have been able to implement a (mostly complete) JSON parser in just 12 lines of parsing logic, and a pmdas-respecting expression parser in just 6 (with one helper function to apply individual operators).

Examples available on the github repo, also now available on crates.io!

Hi.

Rust can run on anything from web browsers to Adruinos. BUT can you make Android/iOS apps with it? I heard that you can make the backend of your app in Rust and then incorporate it into your Java/Kotlin app, but I'm looking for something like React Native or Flutter, where you can build the entire app (including UI and interacting with native APIs) in Rust without writing a single line of Java/Kotlin.

Does something like that exist? If not, then is anyone working on it?

Oh, and I don't mean I want one of the many libraries which just compile your code to WASM and run the app in a WebView... I want something that lets me make native UIs - like React Native or Flutter.

Thanks

Rust is beautiful and at the same time pretty hard language to learn. While mastering it and digging deeper, I decided to play around basic data structures and algorithms. I put a repo with some theory, implementations and examples on github mainly for myself, but maybe someone will find it helpful, or share more effective solutions. For now, just a few topics are covered, and I'm going to update it from time to time.

repo: https://github.com/tracyspacy/algos_data_structures_rust

I have a plugin trait that includes some heavy types that would be almost impossible to wrap into a single API. It looks like this:

pub struct PluginContext<'a> {
    pub query: &'a mut String,
    pub gl_window: &'a GlutinWindowContext,
    flow: PluginFlowControl,
    pub egui_ctx: &'a Context,
    disable_cursor: bool,
    error: Option<String>,
}
pub trait Plugin {
    fn configure(&mut self, builder: ConfigBuilder) -> Result<ConfigBuilder, ConfigError> {
        Ok(builder)
    }
    fn search(&mut self, ui: &mut Ui, ctx: &mut PluginContext<'_>);
    fn before_search(&mut self, _ctx: &mut PluginContext<'_>) {}
}

Here is what I considered:

1. Keeping all plugins in-repo. This is what I do now, however I'd like to make a plugin that would just pollute the repository. So I need another option that would keep the plugins' freedom as it is right now, but with the possibility to move the plugin out to a separate repository.
2. I tried to look into dynamic loading, and since rust doesn't have a stable ABI, I'm okay with restricting the rust versions for the plugin ecosystem. However, I don't think it's possible to compile this complex API into a dynamic lib and load it safely.
3. I'm also ok with recompiling the app every time I need a new plugin, but I would like to load these plugins automatically, so I don't want to change the code every time I need a new plugin. For example, I imagine loading all plugins from a folder. Unfortunately, I didn't find an easy solution for this neither. I think I will write a build macro that checks the ~/.config/myapp/plugins and include all of them into the repo.

Do you have any better ideas, suggestions? Thanks in advance.

(For context, this the app I'm writing about: https://github.com/fxdave/vonal-rust)

When I install some Linux app from, let's say GitHub, I can feel how long without updates means the project is not maintained.
For example last commit being 5 years ago for GTK app is a long time and this is considered an abandoned repo. For super simple things like cowsay it's not that simple but still I can feel it.

How is that with crates with Rust? I see a lot of parsers or web libraries that are not updated for a year, two years, three years... How old is too old?
Also, many of them have a version 0.x.x, so can I even consider them stable?