core/emgauwa-lib/src/utils.rs

pub fn load_settings<T>(config_name: &str, env_prefix: &str) -> T
where
	for<'de> T: serde::Deserialize<'de>,
{
	let default_file = config::File::with_name(&format!("emgauwa-{}", config_name)).required(false);

	config::Config::builder()
		.add_source(default_file)
		.add_source(
			config::Environment::with_prefix(&format!("EMGAUWA_{}", env_prefix))
				.prefix_separator("__")
				.separator("__"),
		)
		.build()
		.expect("Error building settings")
		.try_deserialize::<T>()
		.expect("Error reading settings")
}