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#![allow(dead_code)]
use std::env;
use std::ops::Bound;
pub fn probe_lua() {
let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
if target_arch == "wasm32" && cfg!(not(feature = "vendored")) {
panic!("Please enable `vendored` feature to build for wasm32");
}
let lib_dir = env::var("LUA_LIB").unwrap_or_default();
let lua_lib = env::var("LUA_LIB_NAME").unwrap_or_default();
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");
if !lua_lib.is_empty() {
if !lib_dir.is_empty() {
println!("cargo:rustc-link-search=native={lib_dir}");
}
let mut link_lib = "";
if env::var("LUA_LINK").as_deref() == Ok("static") {
link_lib = "static=";
};
println!("cargo:rustc-link-lib={link_lib}{lua_lib}");
return;
}
// Find using `pkg-config`
#[cfg(feature = "lua54")]
let (incl_bound, excl_bound, alt_probe, ver) =
("5.4", "5.5", ["lua5.4", "lua-5.4", "lua54"], "5.4");
#[cfg(feature = "lua53")]
let (incl_bound, excl_bound, alt_probe, ver) =
("5.3", "5.4", ["lua5.3", "lua-5.3", "lua53"], "5.3");
#[cfg(feature = "lua52")]
let (incl_bound, excl_bound, alt_probe, ver) =
("5.2", "5.3", ["lua5.2", "lua-5.2", "lua52"], "5.2");
#[cfg(feature = "lua51")]
let (incl_bound, excl_bound, alt_probe, ver) =
("5.1", "5.2", ["lua5.1", "lua-5.1", "lua51"], "5.1");
#[cfg(feature = "luajit")]
let (incl_bound, excl_bound, alt_probe, ver) = ("2.0.4", "2.2", [], "JIT");
#[rustfmt::skip]
let mut lua = pkg_config::Config::new()
.range_version((Bound::Included(incl_bound), Bound::Excluded(excl_bound)))
.cargo_metadata(true)
.probe(if cfg!(feature = "luajit") { "luajit" } else { "lua" });
if lua.is_err() {
for pkg in alt_probe {
lua = pkg_config::Config::new()
.cargo_metadata(true)
.probe(pkg);
if lua.is_ok() {
break;
}
}
}
lua.unwrap_or_else(|err| panic!("cannot find Lua{ver} using `pkg-config`: {err}"));
}
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