esp-hal/esp-backtrace/build.rs

use esp_config::generate_config_from_yaml_definition;

#[macro_export]
macro_rules! assert_unique_used_features {
    ($($feature:literal),+ $(,)?) => {
        assert!(
            (0 $(+ cfg!(feature = $feature) as usize)+ ) == 1,
            "Exactly one of the following features must be enabled: {}",
            [$($feature),+].join(", ")
        );
    };
}

fn main() {
    // Ensure that only a single chip is specified:
    let _ = esp_metadata::Chip::from_cargo_feature().unwrap();

    // Ensure that exactly a backend is selected:
    assert_unique_used_features!("defmt", "println");

    if cfg!(feature = "custom-halt") && cfg!(feature = "halt-cores") {
        panic!("Only one of `custom-halt` and `halt-cores` can be enabled");
    }

    // emit config
    println!("cargo:rerun-if-changed=./esp_config.yml");
    let cfg_yaml = std::fs::read_to_string("./esp_config.yml")
        .expect("Failed to read esp_config.yml for esp-backtrace");
    generate_config_from_yaml_definition(&cfg_yaml, true, true, None).unwrap();
}