You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: find_normal.rs
    path of file: ./repos/mlua/mlua-sys/build
    
    the code of the file until where you have to start completion: #![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", Some("lua5.4"), "5.4");
    #[cfg(feature = "lua53")]
    let (incl_bound, excl_bound, alt_probe, ver) = ("5.3", "5.4", Some("lua5.3"), "5.3");
    #[cfg(feature = "lua52")]
    let (incl_bound, excl_bound, alt_probe, ver) = ("5.2", "5.
    
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", Some("lua5.4"), "5.4");
    #[cfg(feature = "lua53")]
    let (incl_bound, excl_bound, alt_probe, ver) = ("5.3", "5.4", Some("lua5.3"), "5.3");
    #[cfg(feature = "lua52")]
    let (incl_bound, excl_bound, alt_probe, ver) = ("5.2", "5.3", Some("lua5.2"), "5.2");
    #[cfg(feature = "lua51")]
    let (incl_bound, excl_bound, alt_probe, ver) = ("5.1", "5.2", Some("lua5.1"), "5.1");
    #[cfg(feature = "luajit")]
    let (incl_bound, excl_bound, alt_probe, ver) = ("2.0.4", "2.2", None, "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() && alt_probe.is_some() {
        lua = pkg_config::Config::new()
            .cargo_metadata(true)
            .probe(alt_probe.unwrap());
    }

    lua.unwrap_or_else(|err| panic!("cannot find Lua{ver} using `pkg-config`: {err}"));
}