Don't read lua.h from build script (was not used)
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parent
0d404ce4c3
commit
3e7f25670a
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@ -1,13 +1,19 @@
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use std::env;
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use std::fs::File;
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use std::io::{BufRead, BufReader, Result};
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use std::ops::Bound;
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use std::path::{Path, PathBuf};
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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() -> PathBuf {
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let include_dir = env::var_os("LUA_INC").unwrap_or_default();
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let lib_dir = env::var_os("LUA_LIB").unwrap_or_default();
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let lua_lib = env::var_os("LUA_LIB_NAME").unwrap_or_default();
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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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@ -16,11 +22,22 @@ pub fn probe_lua() -> PathBuf {
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let need_lua_lib = cfg!(any(not(feature = "module"), target_os = "windows"));
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if include_dir != "" && (!need_lua_lib || lib_dir != "") {
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if need_lua_lib && lua_lib == "" {
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if include_dir != "" {
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if need_lua_lib {
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if lib_dir == "" {
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panic!("LUA_LIB is not set");
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}
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if lua_lib == "" {
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panic!("LUA_LIB_NAME is not set");
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}
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let _version = use_custom_lua(&include_dir, &lib_dir, &lua_lib).unwrap();
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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 PathBuf::from(include_dir);
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}
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@ -100,39 +117,3 @@ pub fn probe_lua() -> PathBuf {
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lua.unwrap().include_paths[0].clone()
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}
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}
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fn use_custom_lua<S: AsRef<Path>>(include_dir: &S, lib_dir: &S, lua_lib: &S) -> Result<String> {
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let mut version_found = String::new();
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// Find LUA_VERSION_NUM
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let mut lua_h_path = include_dir.as_ref().to_owned();
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lua_h_path.push("lua.h");
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let f = File::open(lua_h_path)?;
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let reader = BufReader::new(f);
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for line in reader.lines() {
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let line = line?;
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let parts = line.split_whitespace().collect::<Vec<_>>();
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if parts.len() == 3 && parts[1] == "LUA_VERSION_NUM" {
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version_found = parts[2].to_string();
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}
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}
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let link_lib = match env::var("LUA_LINK") {
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Ok(s) if s == "static" => "static=",
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_ => "",
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};
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if cfg!(any(not(feature = "module"), target_os = "windows")) {
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println!(
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"cargo:rustc-link-search=native={}",
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lib_dir.as_ref().display()
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);
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println!(
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"cargo:rustc-link-lib={}{}",
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link_lib,
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lua_lib.as_ref().display()
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);
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}
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Ok(version_found)
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}
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