Stream: rust-toolchain

Topic: ✔ Components are not being Linked

Joshua Aruokhai (Jul 16 2024 at 09:04):

Hello Guys, i have two components, called store and cli, store is a lib component while cli like the name signifies is a cli component, .
The Store component has two wit files, they are as follows :

types.wit

package component:store;

interface types {

    record key-value-pair {
        key: string,
        value: string,
    }

    type key = string;

    enum error{
        nae,
    }


    resource store {

        constructor();

        insert: func(kv: key-value-pair) -> result<_, error>;

        search: func(key: key) -> result<key-value-pair, error>;

        delete: func(key: key) -> result<_, error>;


}

}

world.wit

package component:store;

interface types {

    record key-value-pair {
        key: string,
        value: string,
    }

    type key = string;

    enum error{
        nae,
    }


    resource store {

        constructor();

        insert: func(kv: key-value-pair) -> result<_, error>;

        search: func(key: key) -> result<key-value-pair, error>;

        delete: func(key: key) -> result<_, error>;


}

}

The cli component only has a single main.rs file

#[allow(warnings)]
mod bindings;

use bindings::component::store::types::{KeyValuePair, Store};


fn main() {
    let new_store = Store::new();
        new_store.insert(&KeyValuePair{ key: "hello".to_owned(), value: "world".to_owned()}).unwrap();
        assert_eq!(new_store.search(&"hello".to_owned()).unwrap().value, "world".to_owned())
}

I built both components with cargo component build which ran successfully without errors.
I also composed both components with command wac plug target/wasm32-wasi/debug/cli.wasm --plug target/wasm32-wasi/debug/store.wasm -o composed1.wasm which also ran fine without issues.
The issue comes when i try to run the composed wasm with command wasmtime run --dir /home/WASI_PROJECTS/ -S inherit-network -S cli -S preview2 -S tcp ./composed1.wasm It outputs such error :

Error: failed to run main module ./composed1.wasm

Caused by:
0: component imports instance component:store/types, but a matching implementation was not found in the linker
1: instance export store has the wrong type
2: resource implementation is missing

Joshua Aruokhai (Jul 16 2024 at 13:29):

Joshua Aruokhai said:

Hello Guys, i have two components, called store and cli, store is a lib component while cli like the name signifies is a cli component, .
The Store component has two wit files, they are as follows :

types.wit

package component:store;

interface types {

    record key-value-pair {
        key: string,
        value: string,
    }

    type key = string;

    enum error{
        nae,
    }


    resource store {

        constructor();

        insert: func(kv: key-value-pair) -> result<_, error>;

        search: func(key: key) -> result<key-value-pair, error>;

        delete: func(key: key) -> result<_, error>;


}

}

world.wit

package component:store;

interface types {

    record key-value-pair {
        key: string,
        value: string,
    }

    type key = string;

    enum error{
        nae,
    }


    resource store {

        constructor();

        insert: func(kv: key-value-pair) -> result<_, error>;

        search: func(key: key) -> result<key-value-pair, error>;

        delete: func(key: key) -> result<_, error>;


}

}

The cli component only has a single main.rs file

#[allow(warnings)]
mod bindings;

use bindings::component::store::types::{KeyValuePair, Store};


fn main() {
    let new_store = Store::new();
        new_store.insert(&KeyValuePair{ key: "hello".to_owned(), value: "world".to_owned()}).unwrap();
        assert_eq!(new_store.search(&"hello".to_owned()).unwrap().value, "world".to_owned())
}

I built both components with cargo component build which ran successfully without errors.
I also composed both components with command wac plug target/wasm32-wasi/debug/cli.wasm --plug target/wasm32-wasi/debug/store.wasm -o composed1.wasm which also ran fine without issues.
The issue comes when i try to run the composed wasm with command wasmtime run --dir /home/WASI_PROJECTS/ -S inherit-network -S cli -S preview2 -S tcp ./composed1.wasm It outputs such error :

Error: failed to run main module ./composed1.wasm

Caused by:
0: component imports instance component:store/types, but a matching implementation was not found in the linker
1: instance export store has the wrong type
2: resource implementation is missing

Found my mistake, each component wit file needs to have a package version

Notification Bot (Jul 16 2024 at 13:29):

Joshua Aruokhai has marked this topic as resolved.

Last updated: Oct 23 2024 at 20:03 UTC