CODEWITHSUNDEEP
rustrust-tonic
Silva
Silva

Reputation: 675

tonic_build add/use external crates like serde

I'm trying to use or add an external create like serde, to the build.rs file that tonic_build will use to generate the .rs file from the .proto file.

// build.rs file 
    let proto_file = "src/hello/hello.proto";

    tonic_build::configure()
        .build_server(true)
        .out_dir("./src/hello")
        .type_attribute("HelloRequest", "#[derive(Deserialize, Serialize)]") // adding attributes
        .compile(&[proto_file], &["."])
        .unwrap_or_else(|e| panic!("protobuf compile error: {}", e));

I can see the attributes are added to the rust file, see below :

#[derive(Deserialize, Serialize)]
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct HelloRequest {
    #[prost(string, tag="1")]
    pub id: ::prost::alloc::string::String,
    #[prost(string, tag="2")]
    pub message: ::prost::alloc::string::String,
}

but the file doesn't add: use serde::{Serialize, Deserialize}; causing the build to fail. I tried using server_mod_attribute but failed. how can I add use serde::{Serialize, Deserialize} to the auto-generated .rs file using tonic_build?

Upvotes: 3

Views: 1745

Answers (1)

cperez08
cperez08

Reputation: 749

you can use the full path to the library

.type_attribute("HelloRequest", "#[derive(serde::Deserialize, serde::Serialize)]")

Upvotes: 3

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