Native assets
Native Assets are the Dart/Flutter build hooks mechanism for building and bundling native code assets. In flutter_rust_bridge, this is a compilation backend: it controls how the Rust library is built and packaged. It does not replace the core bridge code generator.
The flutter_rust_bridge Native Assets backend is available through --integration-backend native-assets.
Usage
Generate a project with:
flutter_rust_bridge_codegen create my_app --integration-backend native-assets
Or integrate into an existing project with:
flutter_rust_bridge_codegen integrate --integration-backend native-assets
The generated hook/build.dart uses flutter_rust_bridge_hooks.
That package currently wraps native_toolchain_rust, which compiles the Rust crate with Cargo and registers the result as a Dart/Flutter code asset.
Rust crate requirements
The Rust crate must be buildable by Cargo for the requested target platform.
For native_toolchain_rust, the crate needs a library target that can produce both static and dynamic artifacts:
[lib]
crate-type = ["staticlib", "cdylib"]
The crate also needs a rust-toolchain.toml that pins a concrete Rust toolchain and lists the supported targets.
Do not rely on a floating stable, beta, or nightly channel for reproducible build hooks.