Don't read lua.h from build script (was not used)

This commit is contained in:
Alex Orlenko 2021-04-20 02:05:00 +01:00
parent 0d404ce4c3
commit 3e7f25670a
1 changed files with 27 additions and 46 deletions

View File

@ -1,13 +1,19 @@
use std::env;
use std::fs::File;
use std::io::{BufRead, BufReader, Result};
use std::ops::Bound;
use std::path::{Path, PathBuf};
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 = 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();
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");
@ -16,11 +22,22 @@ pub fn probe_lua() -> PathBuf {
let need_lua_lib = cfg!(any(not(feature = "module"), target_os = "windows"));
if include_dir != "" && (!need_lua_lib || lib_dir != "") {
if need_lua_lib && lua_lib == "" {
if include_dir != "" {
if need_lua_lib {
if lib_dir == "" {
panic!("LUA_LIB is not set");
}
if lua_lib == "" {
panic!("LUA_LIB_NAME is not set");
}
let _version = use_custom_lua(&include_dir, &lib_dir, &lua_lib).unwrap();
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);
}
@ -100,39 +117,3 @@ pub fn probe_lua() -> PathBuf {
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)
}