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//! Example of instantiating a wasm module which uses WASI imports.
/*
You can execute this example with:
cmake examples/
cargo run --example wasi
*/
use wasi_common::sync::WasiCtxBuilder;
use wasmtime::*;
fn main() -> Result<()> {
// Define the WASI functions globally on the `Config`.
let engine = Engine::default();
let mut linker = Linker::new(&engine);
wasi_common::sync::add_to_linker(&mut linker, |s| s)?;
// Create a WASI context and put it in a Store; all instances in the store
// share this context. `WasiCtxBuilder` provides a number of ways to
// configure what the target program will have access to.
let wasi = WasiCtxBuilder::new()
.inherit_stdio()
.inherit_args()?
.build();
let mut store = Store::new(&engine, wasi);
// Instantiate our module with the imports we've created, and run it.
let module = Module::from_file(&engine, "target/wasm32-wasip1/debug/wasi.wasm")?;
linker.module(&mut store, "", &module)?;
linker
.get_default(&mut store, "")?
.typed::<(), ()>(&store)?
.call(&mut store, ())?;
Ok(())
}
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