extern crate rustc_version;
use rustc_version::{version, version_meta, Channel};

use config_struct::{Error, StructOptions};

fn main() -> Result<(), Error> {
    // Assert we haven't travelled back in time
    assert!(version().unwrap().major >= 1);

    // Set cfg flags depending on release channel
    match version_meta().unwrap().channel {
        Channel::Stable => {
            println!("cargo:rustc-cfg=stable");
        }
        Channel::Beta => {
            println!("cargo:rustc-cfg=beta");
        }
        Channel::Nightly => {
            println!("cargo:rustc-cfg=nightly");
        }
        Channel::Dev => {
            println!("cargo:rustc-cfg=dev");
        }
    }

    config_struct::create_struct(
	"build/config.toml",
	"src/config/build_cfg.rs",
	&StructOptions::default())?;
    
    Ok(())
}