canton-lf 0.3.2

//! Generate Rust types from the vendored Daml-LF archive `.proto` files
//! (`daml_lf.proto` + `daml_lf2.proto`, under `proto/`, pinned to Canton 3.5.17's
//! snapshot). LF-LF messages only — no gRPC services — so plain `prost-build`.

use std::path::PathBuf;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let proto_root = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("proto");
    println!("cargo:rerun-if-changed=proto");

    // Vendor `protoc` so no system install is needed. Passing the path to
    // prost-build directly (rather than via `env::set_var`) keeps the build
    // script free of `unsafe`, so this crate can keep the workspace lint set.
    let protoc = protoc_bin_vendored::protoc_bin_path()?;

    let proto_files = [
        proto_root.join("com/digitalasset/daml/lf/archive/daml_lf.proto"),
        proto_root.join("com/digitalasset/daml/lf/archive/daml_lf2.proto"),
    ];

    // `include_file` wires the two proto packages (`daml_lf`, `daml_lf_2`)
    // into one module tree with correct cross-package paths.
    prost_build::Config::new()
        .protoc_executable(&protoc)
        .include_file("_daml_lf.rs")
        .compile_protos(&proto_files, &[proto_root])?;
    Ok(())
}