use regex::Regex; use std::fmt::Write as _; use std::fs::File; use std::io::Write; use std::path::PathBuf; use std::{env, fs}; fn main() { let chip = env::vars_os() .map(|(a, _)| a.to_string_lossy().to_string()) .find(|x| x.starts_with("CARGO_FEATURE_STM32")) .expect("No stm32xx Cargo feature enabled") .strip_prefix("CARGO_FEATURE_") .unwrap() .to_ascii_lowercase(); let mut device_x = String::new(); let chip_rs = fs::read_to_string(format!("src/pac/{}.rs", chip)).unwrap(); let re = Regex::new("declare!\\(([a-zA-Z0-9_]+)\\)").unwrap(); for c in re.captures_iter(&chip_rs) { let name = c.get(1).unwrap().as_str(); write!(&mut device_x, "PROVIDE({} = DefaultHandler);\n", name).unwrap(); } let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap()); File::create(out.join("device.x")) .unwrap() .write_all(device_x.as_bytes()) .unwrap(); println!("cargo:rustc-link-search={}", out.display()); println!("cargo:rerun-if-changed=src/pac/{}.rs", chip); println!("cargo:rerun-if-changed=build.rs"); }