57 lines
2 KiB
Rust
57 lines
2 KiB
Rust
//! Build script generating the header for the `servicepoint` C library.
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//!
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//! When the environment variable `SERVICEPOINT_HEADER_OUT` is set, the header is copied there from
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//! the out directory. This can be used to use the build script as a command line tool from other
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//! build tools.
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use std::{env, fs};
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fn main() {
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let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
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let is_recursive = env::var("SERVICEPOINT_IS_BUILDING")
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.unwrap_or("".to_string())
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== "true";
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unsafe {
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env::set_var("SERVICEPOINT_IS_BUILDING", "true");
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}
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println!("cargo::rerun-if-changed={crate_dir}/src");
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println!("cargo::rerun-if-changed={crate_dir}/build.rs");
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println!("cargo::rerun-if-changed={crate_dir}/Cargo.toml");
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println!("cargo::rerun-if-changed={crate_dir}/Cargo.lock");
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println!("cargo::rerun-if-changed={crate_dir}/cbindgen.toml");
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println!("cargo::rerun-if-env-changed=SERVICEPOINT_HEADER_OUT");
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let config =
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cbindgen::Config::from_file(crate_dir.clone() + "/cbindgen.toml")
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.unwrap();
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let output_dir = &env::var("OUT_DIR").unwrap();
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let header_file = output_dir.clone() + "/servicepoint.h";
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let bindings = cbindgen::generate_with_config(crate_dir, config)
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.expect("Servicepoint header could not be generated");
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bindings.write_to_file(&header_file);
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println!("cargo:include={output_dir}");
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if is_recursive {
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return;
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}
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if let Ok(header_out) = env::var("SERVICEPOINT_HEADER_OUT") {
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if !fs::exists(&header_out).unwrap() {
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panic!(
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"SERVICEPOINT_HEADER_OUT is not set to an existing directory"
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);
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}
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let header_copy = header_out + "/servicepoint.h";
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println!("cargo:warning=Copying header to {header_copy}");
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fs::copy(header_file, &header_copy)
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.expect("header could not be copied to SERVICEPOINT_HEADER_OUT");
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println!("cargo::rerun-if-changed={header_copy}");
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}
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}
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