A ddnet / teeworlds configuration parser.
It recognizes the available options by parsing source files with MACRO_CONFIG_ lines such as src/engine/shared/config_variables.h.
use teeconfig::parse_config_variables;
let header_source = include_str!("../config_variables.h");
let vars = parse_config_variables(header_source).unwrap();
assert!(!vars.is_empty())