59 lines
2.2 KiB
Rust
59 lines
2.2 KiB
Rust
//! Build script generating the header for the `servicepoint` C library.
|
|
//!
|
|
//! When the environment variable `SERVICEPOINT_HEADER_OUT` is set, the header is copied there from
|
|
//! the out directory. This can be used to use the build script as a command line tool from other
|
|
//! build tools.
|
|
|
|
use std::{env, fs};
|
|
|
|
fn main() {
|
|
let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
|
|
println!("cargo::rerun-if-changed={crate_dir}/src");
|
|
println!("cargo::rerun-if-changed={crate_dir}/build.rs");
|
|
println!("cargo::rerun-if-changed={crate_dir}/Cargo.toml");
|
|
println!("cargo::rerun-if-changed={crate_dir}/Cargo.lock");
|
|
println!("cargo::rerun-if-changed={crate_dir}/cbindgen.toml");
|
|
println!("cargo::rerun-if-env-changed=SERVICEPOINT_HEADER_OUT");
|
|
|
|
let config =
|
|
cbindgen::Config::from_file(crate_dir.clone() + "/cbindgen.toml")
|
|
.unwrap();
|
|
let output_dir = env::var("OUT_DIR").unwrap();
|
|
let header_file = output_dir.clone() + "/servicepoint.h";
|
|
|
|
let bindings = match cbindgen::generate_with_config(crate_dir, config) {
|
|
Ok(bindings) => bindings,
|
|
Err(e) => {
|
|
eprintln!("cargo:warning=Servicepoint header could not be generated: {e:?}");
|
|
return;
|
|
}
|
|
};
|
|
|
|
bindings.write_to_file(&header_file);
|
|
println!("cargo:include={output_dir}");
|
|
|
|
if let Ok(header_out) = env::var("SERVICEPOINT_HEADER_OUT") {
|
|
let header_copy = header_out + "/servicepoint.h";
|
|
|
|
if fs::exists(&header_copy).ok().unwrap_or(false) {
|
|
// check if content changed to prevent rebuild of dependents if not
|
|
|
|
let mut bindings_text = Vec::new();
|
|
bindings.write(&mut bindings_text);
|
|
|
|
match fs::read(&header_copy) {
|
|
Ok(old_content) if old_content == bindings_text => {
|
|
println!("cargo:warning=Header did not change, not updating timestamp");
|
|
return;
|
|
}
|
|
_ => {}
|
|
};
|
|
}
|
|
|
|
// file does not exist or is different
|
|
println!("cargo:warning=Copying header to {header_copy}");
|
|
fs::copy(header_file, &header_copy).unwrap();
|
|
println!("cargo::rerun-if-changed={header_copy}");
|
|
}
|
|
}
|