rust-protobuf-build

Generate Protobuf Rust sources during cargo build.

This crate simplifies protobuf files generation, by allowing them to be generated by cargo. protoc-gen-rust does not need to be in $PATH for it to work, reducing the number of external dependencies.

On the other hand, libprotoc-dev is required.

Usage

Add to your Cargo.toml

[package]
build = "build.rs"

[build-dependencies.protobuf-build]
git = "https://github.com/plietar/rust-protobuf-build.git"

And create a cargo build script, build.rs:

extern crate protobuf_build;

use std::env;
use std::path::PathBuf;

fn main() {
    let root = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
    let source = root.join("proto");

    let out = PathBuf::from(env::var("OUT_DIR").unwrap());

    let mut compiler = protobuf_build::Compiler::new(&source, &out);

    compiler.compile("example.proto").unwrap();
}

The easiest way to include the file is using the mod_path compiler plugin. Unfortunately, this requires Rust nightly. Once rust-lang/rust#18849 is fixed, this will be usable on stable rust.

mod_path! example (concat!(env!("OUT_DIR"), "/example.rs"));