napi-rs/build/src/lib.rs
2020-10-30 18:29:08 -07:00

119 lines
3.8 KiB
Rust

extern crate cfg_if;
use std::process::Command;
use cfg_if::cfg_if;
cfg_if! {
if #[cfg(windows)] {
use std::fs::{create_dir, metadata, write};
use std::path::PathBuf;
use std::io::Read;
fn get_node_version() -> std::io::Result<String> {
let output = Command::new("node").arg("-v").output()?;
let stdout_str = String::from_utf8_lossy(&output.stdout);
// version should not have a leading "v" or trailing whitespace
Ok(stdout_str.trim().trim_start_matches('v').to_string())
}
fn download_node_lib(dist_url: &str, version: &str) -> Vec<u8> {
let url = format!("{dist_url}/v{version}/win-x64/node.lib", dist_url = dist_url, version = version);
let response = ureq::get(&url).call();
if let Some(error) = response.synthetic_error() {
panic!("Failed to download node.lib: {:#?}", error);
}
let mut reader = response.into_reader();
let mut bytes = vec![];
reader.read_to_end(&mut bytes).unwrap();
bytes
}
pub fn setup() {
// Assume nodejs if not specified.
let dist_url = std::env::var("NPM_CONFIG_DISTURL")
.unwrap_or("https://nodejs.org/dist".into());
// Try to get local nodejs version if not specified.
let node_version = std::env::var("NPM_CONFIG_TARGET")
.or_else(|_| get_node_version())
.expect("Failed to determine nodejs version");
println!("cargo:rerun-if-env-changed=NPM_CONFIG_DISTURL");
println!("cargo:rerun-if-env-changed=NPM_CONFIG_TARGET");
let mut node_lib_file_dir =
PathBuf::from(String::from_utf8(Command::new("node").arg("-e").arg("console.log(require('os').homedir())").output().unwrap().stdout).unwrap().trim_end().to_owned());
node_lib_file_dir.push(".napi-rs");
match create_dir(&node_lib_file_dir) {
Ok(_) => {},
Err(err) => {
if err.kind() != std::io::ErrorKind::AlreadyExists {
panic!("create {} folder failed: {}", node_lib_file_dir.to_str().unwrap(), err)
}
},
}
let link_search_dir = node_lib_file_dir.clone();
node_lib_file_dir.push(format!("node-{}.lib", node_version));
if let Err(_) = metadata(&node_lib_file_dir) {
let node_lib = download_node_lib(&dist_url, &node_version);
write(&node_lib_file_dir, &node_lib).expect(&format!("Could not save file to {}", node_lib_file_dir.to_str().unwrap()));
}
println!(
"cargo:rustc-link-lib={}",
&node_lib_file_dir.file_stem().unwrap().to_str().unwrap()
);
println!("cargo:rustc-link-search=native={}", link_search_dir.to_str().unwrap());
// Link `win_delay_load_hook.obj` for windows electron
println!("cargo:rustc-cdylib-link-arg=delayimp.lib");
println!("cargo:rustc-cdylib-link-arg=/DELAYLOAD:node.exe");
setup_napi_feature();
}
} else if #[cfg(target_os = "macos")] {
/// Set up the build environment by setting Cargo configuration variables.
pub fn setup() {
println!("cargo:rustc-cdylib-link-arg=-Wl");
println!("cargo:rustc-cdylib-link-arg=-undefined");
println!("cargo:rustc-cdylib-link-arg=dynamic_lookup");
setup_napi_feature();
}
} else {
pub fn setup() {
setup_napi_feature();
}
}
}
pub fn setup_napi_feature() {
let napi_version = String::from_utf8(
Command::new("node")
.args(&["-e", "console.log(process.versions.napi)"])
.output()
.unwrap()
.stdout,
)
.expect("Get NAPI version failed");
let napi_version_number = napi_version.trim().parse::<u32>().unwrap();
if napi_version_number < 2 {
panic!("current napi version is too low");
}
if napi_version_number == 2 {
println!("cargo:rustc-cfg=napi{}", napi_version_number);
} else {
for version in 2..(napi_version_number + 1) {
println!("cargo:rustc-cfg=napi{}", version);
}
}
}