lla_plugin_interface 0.5.3

use std::io::Result;

fn main() -> Result<()> {
    #[cfg(feature = "regenerate-protobuf")]
    {
        use std::path::PathBuf;
        use std::process::Command;
        let out_dir = PathBuf::from(std::env::var("OUT_DIR").unwrap());
        println!("cargo:rerun-if-changed=src/plugin.proto");

        let protoc_available =
            std::env::var("PROTOC").is_ok() || Command::new("protoc").output().is_ok();
        if !protoc_available {
            return Err(std::io::Error::new(
                std::io::ErrorKind::NotFound,
                "protoc not found (required for --features regenerate-protobuf). Install protoc or set PROTOC to its path.",
            ));
        }

        prost_build::Config::new()
            .out_dir(&out_dir)
            .compile_protos(&["src/plugin.proto"], &["src/"])
            .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e.to_string()))?;

        // Best-effort: update the checked-in bindings so users without protoc can still build.
        if let Err(e) = std::fs::create_dir_all("src/generated") {
            eprintln!("Warning: Failed to create generated directory: {}", e);
            return Ok(());
        }

        if let Err(e) = std::fs::copy(out_dir.join("lla_plugin.rs"), "src/generated/mod.rs") {
            eprintln!("Warning: Failed to copy generated file: {}", e);
        }
    }
    Ok(())
}