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|
use std::env;
use std::fs::File;
use std::io::{BufRead, BufReader, Result};
use std::ops::Bound;
use std::path::{Path, PathBuf};
pub fn probe_lua() -> PathBuf {
let include_dir = env::var_os("LUA_INC").unwrap_or_default();
let lib_dir = env::var_os("LUA_LIB").unwrap_or_default();
let lua_lib = env::var_os("LUA_LIB_NAME").unwrap_or_default();
println!("cargo:rerun-if-env-changed=LUA_INC");
println!("cargo:rerun-if-env-changed=LUA_LIB");
println!("cargo:rerun-if-env-changed=LUA_LIB_NAME");
println!("cargo:rerun-if-env-changed=LUA_LINK");
let need_lua_lib = cfg!(any(not(feature = "module"), target_os = "windows"));
if include_dir != "" && (!need_lua_lib || lib_dir != "") {
if lua_lib == "" {
panic!("LUA_LIB_NAME is not set");
}
let _version = use_custom_lua(&include_dir, &lib_dir, &lua_lib).unwrap();
return PathBuf::from(include_dir);
}
// Find using `pkg-config`
#[cfg(feature = "lua54")]
{
let mut lua = pkg_config::Config::new()
.range_version((Bound::Included("5.4"), Bound::Excluded("5.5")))
.cargo_metadata(need_lua_lib)
.probe("lua");
if lua.is_err() {
lua = pkg_config::Config::new()
.cargo_metadata(need_lua_lib)
.probe("lua5.4");
}
lua.unwrap().include_paths[0].clone()
}
#[cfg(feature = "lua53")]
{
let mut lua = pkg_config::Config::new()
.range_version((Bound::Included("5.3"), Bound::Excluded("5.4")))
.cargo_metadata(need_lua_lib)
.probe("lua");
if lua.is_err() {
lua = pkg_config::Config::new()
.cargo_metadata(need_lua_lib)
.probe("lua5.3");
}
lua.unwrap().include_paths[0].clone()
}
#[cfg(feature = "lua52")]
{
let mut lua = pkg_config::Config::new()
.range_version((Bound::Included("5.2"), Bound::Excluded("5.3")))
.cargo_metadata(need_lua_lib)
.probe("lua");
if lua.is_err() {
lua = pkg_config::Config::new()
.cargo_metadata(need_lua_lib)
.probe("lua5.2");
}
lua.unwrap().include_paths[0].clone()
}
#[cfg(feature = "lua51")]
{
let mut lua = pkg_config::Config::new()
.range_version((Bound::Included("5.1"), Bound::Excluded("5.2")))
.cargo_metadata(need_lua_lib)
.probe("lua");
if lua.is_err() {
lua = pkg_config::Config::new()
.cargo_metadata(need_lua_lib)
.probe("lua5.1");
}
lua.unwrap().include_paths[0].clone()
}
#[cfg(feature = "luajit")]
{
let lua = pkg_config::Config::new()
.range_version((Bound::Included("2.0.5"), Bound::Unbounded))
.cargo_metadata(need_lua_lib)
.probe("luajit");
lua.unwrap().include_paths[0].clone()
}
}
fn use_custom_lua<S: AsRef<Path>>(include_dir: &S, lib_dir: &S, lua_lib: &S) -> Result<String> {
let mut version_found = String::new();
// Find LUA_VERSION_NUM
let mut lua_h_path = include_dir.as_ref().to_owned();
lua_h_path.push("lua.h");
let f = File::open(lua_h_path)?;
let reader = BufReader::new(f);
for line in reader.lines() {
let line = line?;
let parts = line.split_whitespace().collect::<Vec<_>>();
if parts.len() == 3 && parts[1] == "LUA_VERSION_NUM" {
version_found = parts[2].to_string();
}
}
let link_lib = match env::var("LUA_LINK") {
Ok(s) if s == "static" => "static=",
_ => "",
};
if cfg!(any(not(feature = "module"), target_os = "windows")) {
println!(
"cargo:rustc-link-search=native={}",
lib_dir.as_ref().display()
);
println!(
"cargo:rustc-link-lib={}{}",
link_lib,
lua_lib.as_ref().display()
);
}
Ok(version_found)
}
|
