use std::{ env, path::{Path, PathBuf}, }; fn find_package(name: &str) -> vcpkg::Library { let mut cfg = vcpkg::Config::new(); cfg.emit_includes(true); let mut res = cfg.find_package(name); if res.is_err() { let target = { if cfg!(windows) { ":x64-windows-static" } else { "" } }; std::process::Command::new("vcpkg") .arg("install") .arg(format!("{}{}", name, target)) .status() .unwrap(); res = cfg.find_package(name); } res.unwrap() } fn generate_bindings(ffi_header: &Path, include_paths: &[PathBuf], ffi_rs: &Path) { #[derive(Debug)] struct ParseCallbacks; impl bindgen::callbacks::ParseCallbacks for ParseCallbacks { fn int_macro(&self, name: &str, _value: i64) -> Option { if name.starts_with("OPUS") { Some(bindgen::callbacks::IntKind::Int) } else { None } } } let mut b = bindgen::Builder::default() .header(ffi_header.to_str().unwrap()) .parse_callbacks(Box::new(ParseCallbacks)) .generate_comments(false); for dir in include_paths { b = b.clang_arg(format!("-I{}", dir.display())); } b.generate().unwrap().write_to_file(ffi_rs).unwrap(); } fn gen_opus() { let includes = find_package("opus").include_paths; let src_dir = env::var_os("CARGO_MANIFEST_DIR").unwrap(); let src_dir = Path::new(&src_dir); let out_dir = env::var_os("OUT_DIR").unwrap(); let out_dir = Path::new(&out_dir); let ffi_header = src_dir.join("opus_ffi.h"); println!("rerun-if-changed={}", ffi_header.display()); for dir in &includes { println!("rerun-if-changed={}", dir.display()); } let ffi_rs = out_dir.join("opus_ffi.rs"); generate_bindings(&ffi_header, &includes, &ffi_rs); } fn main() { gen_opus() }