94 lines
2.8 KiB
Rust
94 lines
2.8 KiB
Rust
#![allow(dead_code)]
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use std::env;
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use std::ops::Bound;
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use std::path::PathBuf;
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fn get_env_var(name: &str) -> String {
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match env::var(name) {
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Ok(val) => val,
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Err(env::VarError::NotPresent) => String::new(),
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Err(err) => panic!("cannot get {}: {}", name, err),
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}
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}
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pub fn probe_lua() -> Option<PathBuf> {
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let include_dir = get_env_var("LUA_INC");
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let lib_dir = get_env_var("LUA_LIB");
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let lua_lib = get_env_var("LUA_LIB_NAME");
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println!("cargo:rerun-if-env-changed=LUA_INC");
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println!("cargo:rerun-if-env-changed=LUA_LIB");
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println!("cargo:rerun-if-env-changed=LUA_LIB_NAME");
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println!("cargo:rerun-if-env-changed=LUA_LINK");
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let need_lua_lib = cfg!(any(not(feature = "module"), target_os = "windows"));
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if !include_dir.is_empty() {
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if need_lua_lib {
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if lib_dir.is_empty() {
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panic!("LUA_LIB is not set");
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}
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if lua_lib.is_empty() {
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panic!("LUA_LIB_NAME is not set");
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}
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let mut link_lib = "";
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if get_env_var("LUA_LINK") == "static" {
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link_lib = "static=";
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};
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println!("cargo:rustc-link-search=native={}", lib_dir);
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println!("cargo:rustc-link-lib={}{}", link_lib, lua_lib);
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}
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return Some(PathBuf::from(include_dir));
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}
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// Find using `pkg-config`
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#[cfg(feature = "lua54")]
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let (incl_bound, excl_bound, alt_probe, ver) = ("5.4", "5.5", "lua5.4", "5.4");
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#[cfg(feature = "lua53")]
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let (incl_bound, excl_bound, alt_probe, ver) = ("5.3", "5.4", "lua5.3", "5.3");
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#[cfg(feature = "lua52")]
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let (incl_bound, excl_bound, alt_probe, ver) = ("5.2", "5.3", "lua5.2", "5.2");
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#[cfg(feature = "lua51")]
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let (incl_bound, excl_bound, alt_probe, ver) = ("5.1", "5.2", "lua5.1", "5.1");
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#[cfg(any(
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feature = "lua54",
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feature = "lua53",
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feature = "lua52",
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feature = "lua51"
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))]
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{
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let mut lua = pkg_config::Config::new()
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.range_version((Bound::Included(incl_bound), Bound::Excluded(excl_bound)))
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.cargo_metadata(need_lua_lib)
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.probe("lua");
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if lua.is_err() {
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lua = pkg_config::Config::new()
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.cargo_metadata(need_lua_lib)
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.probe(alt_probe);
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}
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lua.unwrap_or_else(|_| panic!("cannot find Lua {} using `pkg-config`", ver))
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.include_paths
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.get(0)
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.cloned()
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}
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#[cfg(feature = "luajit")]
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{
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let lua = pkg_config::Config::new()
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.range_version((Bound::Included("2.0.4"), Bound::Unbounded))
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.cargo_metadata(need_lua_lib)
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.probe("luajit");
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lua.expect("cannot find LuaJIT using `pkg-config`")
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.include_paths
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.get(0)
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.cloned()
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}
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}
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