lance-index 0.10.4

// Copyright 2024 Lance Developers.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::env;
use std::io::Result;

fn main() -> Result<()> {
    println!("cargo:rerun-if-changed=protos");

    let mut prost_build = prost_build::Config::new();
    prost_build.protoc_arg("--experimental_allow_proto3_optional");
    prost_build.compile_protos(&["./protos/index.proto"], &["./protos"])?;

    let rust_toolchain = env::var("RUSTUP_TOOLCHAIN")
        .or_else(|e| match e {
            env::VarError::NotPresent => Ok("stable".into()),
            e => Err(e),
        })
        .unwrap();
    if rust_toolchain.starts_with("nightly") {
        // enable the 'nightly' feature flag
        println!("cargo:rustc-cfg=feature=\"nightly\"");
    }

    Ok(())
}