use const_gen::{const_declaration, CompileConst};
use std::{env, fs, path::Path};

fn main() {
    if let Some(out_dir) = env::var_os("OUT_DIR") {
        let dest_path = Path::new(&out_dir).join("const_config.rs");

        let const_declarations = vec![
            const_declaration!(pub METADATA_DIR_NAME = ".catkin_tools"),
            const_declaration!(pub BUILD_IGNORE_DIRS = ["build", "catkin_tools_prebuild"]),
            const_declaration!(pub COMPILE_COMMANDS_NAME = "compile_commands.json"),
        ]
        .join("\n");

        if let Err(err) = fs::write(dest_path, const_declarations) {
            println!("Cannot write const file: {err}");
        }
    }
    println!("cargo:rerun-if-changed=build.rs");
}