84 lines
2.9 KiB
Rust
84 lines
2.9 KiB
Rust
use std::env;
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use std::env::set_current_dir;
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use std::path::{Path, PathBuf};
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use std::process::Command;
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fn get_go_bin() -> String {
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if cfg!(target_family = "unix") {
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let output = String::from_utf8(
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Command::new("/usr/bin/which")
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.arg("go")
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.output()
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.map_err(|e| println!("cargo:warning=Couldn't find `which` command: {}", e))
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.expect("`which` command not found")
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.stdout,
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)
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.expect("which output couldnt be parsed");
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if output.is_empty() {
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println!("cargo:warning=Couldn't find go binary installed, please ensure that it is installed and/or withing the system paths");
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panic!("Couldn't find `go` binary installed");
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}
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output.trim().to_string()
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} else if cfg!(target_family = "windows") {
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"go".into()
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} else {
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panic!("OS not supported!");
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}
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}
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fn build_go_waku_lib(go_bin: &str, project_dir: &Path) {
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// Build go-waku static lib
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// build command taken from waku make file:
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// https://github.com/status-im/go-waku/blob/eafbc4c01f94f3096c3201fb1e44f17f907b3068/Makefile#L115
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let vendor_path = project_dir.join("vendor");
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set_current_dir(vendor_path).expect("Moving to vendor dir");
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Command::new(go_bin)
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.env("CGO_ENABLED", "1")
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.arg("build")
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.arg("-buildmode=c-archive")
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.arg("-o")
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.arg("./build/lib/libgowaku.a")
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.arg("./library")
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.status()
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.map_err(|e| println!("cargo:warning=go build failed due to: {}", e))
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.unwrap();
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set_current_dir(project_dir).expect("Going back to project dir");
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}
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fn generate_bindgen_code(project_dir: &Path) {
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let lib_dir = project_dir.join("vendor/build/lib");
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println!("cargo:rustc-link-search={}", lib_dir.display());
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println!("cargo:rustc-link-lib=static=gowaku");
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println!("cargo:rerun-if-changed=libgowaku.h");
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// Generate waku bindings with bindgen
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let bindings = bindgen::Builder::default()
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// The input header we would like to generate
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// bindings for.
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.header(format!("{}/{}", lib_dir.display(), "libgowaku.h"))
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// Tell cargo to invalidate the built crate whenever any of the
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// included header files changed.
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.parse_callbacks(Box::new(bindgen::CargoCallbacks))
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// Finish the builder and generate the bindings.
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.generate()
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// Unwrap the Result and panic on failure.
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.expect("Unable to generate bindings");
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// Write the bindings to the $OUT_DIR/bindings.rs file.
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let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
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bindings
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.write_to_file(out_path.join("bindings.rs"))
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.expect("Couldn't write bindings!");
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}
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fn main() {
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let go_bin = get_go_bin();
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let project_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
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build_go_waku_lib(&go_bin, &project_dir);
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generate_bindgen_code(&project_dir);
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}
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