From c484777f3a7dde9e9fe8f47344fd8a6b30840b78 Mon Sep 17 00:00:00 2001 From: Robin Krahl Date: Tue, 22 Sep 2020 19:09:40 +0200 Subject: Add feature to generate bindings during build This patch adds the bindgen feature to the crate that allows users to re-generate the bindings, including layout tests, during the build instead of using the pre-generated bindings. Per default, this feature is disabled. --- build.rs | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'build.rs') diff --git a/build.rs b/build.rs index a6ae9fc..d097021 100644 --- a/build.rs +++ b/build.rs @@ -54,6 +54,35 @@ fn prepare_version_source( Ok(out) } +#[cfg(feature = "bindgen")] +fn generate_bindings(library_path: &path::Path, out_path: &path::Path) { + let header_path = library_path.join("NK_C_API.h"); + let header_str = header_path + .to_str() + .expect("Header path contains invalid UTF-8"); + + let include_path = library_path.join("libnitrokey"); + let include_str = include_path + .to_str() + .expect("Include path contains invalid UTF-8"); + + println!("cargo:rerun-if-changed={}", header_str); + + // always keep options in sync with Makefile + let bindings = bindgen::Builder::default() + .header(header_str) + .whitelist_function("NK_.*") + .whitelist_var("NK_.*") + .whitelist_var("MAXIMUM_STR_REPLY_LENGTH") + .derive_default(true) + .clang_arg(&format!("-I{}", include_str)) + .generate() + .expect("Unable to generate bindings"); + bindings + .write_to_file(out_path.join("bindings.rs")) + .expect("Could not write bindings"); +} + fn main() { if env::var("USE_SYSTEM_LIBNITROKEY").is_ok() { println!("cargo:rustc-link-lib=nitrokey"); @@ -78,6 +107,9 @@ fn main() { let version_source = prepare_version_source(LIBNITROKEY_VERSION, &out_path, &library_path) .expect("Could not prepare the version source file"); + #[cfg(feature = "bindgen")] + generate_bindings(library_path, &out_path); + cc::Build::new() .cpp(true) .flag("-std=c++14") -- cgit v1.2.1