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Remove copy process on building lightgbm-sys #27

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Remove copy process on building lightgbm-sys #27

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44 changes: 8 additions & 36 deletions lightgbm-sys/build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,69 +3,41 @@ extern crate cmake;

use cmake::Config;
use std::env;
use std::path::{Path, PathBuf};
use std::process::Command;
use std::path::PathBuf;

fn main() {
let target = env::var("TARGET").unwrap();
let out_dir = env::var("OUT_DIR").unwrap();
let lgbm_root = Path::new(&out_dir).join("lightgbm");

// copy source code
if !lgbm_root.exists() {
let status = if target.contains("windows") {
Command::new("cmd")
.args(&[
"/C",
"echo D | xcopy /S /Y lightgbm",
lgbm_root.to_str().unwrap(),
])
.status()
} else {
Command::new("cp")
.args(&["-r", "lightgbm", lgbm_root.to_str().unwrap()])
.status()
};
if let Some(err) = status.err() {
panic!(
"Failed to copy ./lightgbm to {}: {}",
lgbm_root.display(),
err
);
}
}

// CMake
let dst = Config::new(&lgbm_root)
let dst = Config::new("lightgbm")
.profile("Release")
.uses_cxx11()
.define("BUILD_STATIC_LIB", "ON")
.build();

// bindgen build
let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
let bindings = bindgen::Builder::default()
.header("wrapper.h")
.clang_args(&["-x", "c++", "-std=c++11"])
.clang_arg(format!("-I{}", lgbm_root.join("include").display()))
.clang_arg(format!("-I{}", out_path.join("include").display()))
.generate()
.expect("Unable to generate bindings");
let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
bindings
.write_to_file(out_path.join("bindings.rs"))
.expect("Couldn't write bindings.");

// link to appropriate C++ lib
if target.contains("apple") {
if cfg!(target_os = "macos") {
println!("cargo:rustc-link-lib=c++");
println!("cargo:rustc-link-lib=dylib=omp");
} else if target.contains("linux") {
} else if cfg!(target_os = "linux") {
println!("cargo:rustc-link-lib=stdc++");
println!("cargo:rustc-link-lib=dylib=gomp");
}

println!("cargo:rustc-link-search={}", out_path.join("lib").display());
println!("cargo:rustc-link-search=native={}", dst.display());
if target.contains("windows") {

if cfg!(target_os = "windows") {
println!("cargo:rustc-link-lib=static=lib_lightgbm");
} else {
println!("cargo:rustc-link-lib=static=_lightgbm");
Expand Down