plugy

plugy is a plugin system designed to enable the seamless integration of Rust-based plugins into your application. It provides a runtime environment for loading and executing plugins written in WebAssembly (Wasm), enabling dynamic extensibility and modularity in your Rust projects.

Features

• Load and execute plugins compiled to WASM.
• Flexible runtime management of plugins.
• Calls to plugin functions are async.
• Easy-to-use macros for generating plugin interfaces.

Getting Started

To use plugy in your Rust project, follow these steps:

1. Write your plugin trait:

#[plugy::plugin]
trait Greeter {
    fn greet(&self) -> String;
}

2. Write your first plugin implementation

#[derive(Debug, Deserialize)]
struct FooPlugin;

#[plugin_impl]
impl Greeter for FooPlugin {
    fn greet(&self) -> String {
        "Hello From Foo Plugin".to_owned()
    }
}

Compile it!

cargo build --target wasm32-unknown-unknown

3. Import and run

#[plugin_import(file = "target/wasm32-unknown-unknown/debug/foo_plugin.wasm")]
struct FooPlugin;

#[tokio::main]
async fn main() {
    let runtime = Runtime::<Box<dyn Greeter>>::new().unwrap();
    let handle = runtime.load(FooPlugin).await.unwrap();
    let res = handle.greet().await;
    assert_eq!(res, "Hello From Foo Plugin")
}

And you are set!

Examples

Check out the examples directory for sample usage of plugy.

Milestones

Status	Goal	Labels
✅	accept multiple arity (n-ary) in plugin functions	complete
✅	pass down context between host and guest	complete

Functionality

Plugy comprises three fundamental crates, each serving a distinct role in crafting dynamic plugin systems with Rust and WebAssembly:

• core: This crate houses essential components such as bitwise utilities and the guest module, forming the foundation of Plugy's functionality.

• runtime: The runtime crate orchestrates the execution of your plugin system, allowing seamless integration of plugins into your applications.

• macros: The macros crate offers a collection of macros that simplify the generation of bindings and interfaces, streamlining the process of working with dynamic plugins.

Contributing

Contributions to plugy are welcome! If you find a bug or want to propose a new feature, feel free to create an issue or submit a pull request.

Thanks to

• Wasmtime
• Bincode
• Serde
• Wasmtime-Serde inspired alot of the inner working of this project

License

This project is licensed under the MIT OR Apache-2.0 License.