crates/lance_ffi/build.rs

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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::path::PathBuf;

fn main() {
    let crate_dir = env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR must be set");
    let out_dir = PathBuf::from(env::var("OUT_DIR").expect("OUT_DIR must be set"));
    let header_path = out_dir.join("paimon_lance_ffi.h");
    let config = cbindgen::Config::from_file(PathBuf::from(&crate_dir).join("cbindgen.toml"))
        .expect("cbindgen.toml must exist at crate root");

    cbindgen::Builder::new()
        .with_crate(&crate_dir)
        .with_config(config)
        .generate()
        .expect("generate paimon_lance_ffi.h")
        .write_to_file(&header_path);

    println!("cargo:include={}", out_dir.display());
    println!("cargo:rerun-if-changed=src");
    println!("cargo:rerun-if-changed=cbindgen.toml");
}