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use std::env;
use std::ops::Bound;
use std::path::PathBuf;
fn get_env_var(name: &str) -> String {
match env::var(name) {
Ok(val) => val,
Err(env::VarError::NotPresent) => String::new(),
Err(err) => panic!("cannot get {}: {}", name, err),
}
}
pub fn probe_lua() -> PathBuf {
let include_dir = get_env_var("LUA_INC");
let lib_dir = get_env_var("LUA_LIB");
let lua_lib = get_env_var("LUA_LIB_NAME");
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.is_empty() {
if need_lua_lib {
if lib_dir.is_empty() {
panic!("LUA_LIB is not set");
}
if lua_lib.is_empty() {
panic!("LUA_LIB_NAME is not set");
}
let mut link_lib = "";
if get_env_var("LUA_LINK") == "static" {
link_lib = "static=";
};
println!("cargo:rustc-link-search=native={}", lib_dir);
println!("cargo:rustc-link-lib={}{}", link_lib, lua_lib);
}
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()
}
}
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