From 7a63987cbee519e9853e37f0a1d91a904a511d07 Mon Sep 17 00:00:00 2001
From: Filip Tibell <filip.tibell@gmail.com>
Date: Sat, 19 Aug 2023 17:34:15 -0500
Subject: [PATCH] Bring back version global

---
 src/lune/globals/mod.rs     |  2 ++
 src/lune/globals/version.rs | 21 ++++++++++++++++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/lune/globals/mod.rs b/src/lune/globals/mod.rs
index 18a70c4..dfcb928 100644
--- a/src/lune/globals/mod.rs
+++ b/src/lune/globals/mod.rs
@@ -4,10 +4,12 @@ use super::util::TableBuilder;
 
 mod g_table;
 mod require;
+mod version;
 
 pub fn inject_all(lua: &'static Lua) -> LuaResult<()> {
     let all = TableBuilder::new(lua)?
         .with_value("_G", g_table::create(lua)?)?
+        .with_value("_VERSION", version::create(lua)?)?
         .with_value("require", require::create(lua)?)?
         .build_readonly()?;
 
diff --git a/src/lune/globals/version.rs b/src/lune/globals/version.rs
index c073bad..153350a 100644
--- a/src/lune/globals/version.rs
+++ b/src/lune/globals/version.rs
@@ -1,5 +1,24 @@
 use mlua::prelude::*;
 
 pub fn create(lua: &'static Lua) -> LuaResult<impl IntoLua<'_>> {
-    lua.create_table()
+    let luau_version_full = lua
+        .globals()
+        .get::<_, LuaString>("_VERSION")
+        .expect("Missing _VERSION global");
+
+    let luau_version = luau_version_full
+        .to_str()?
+        .strip_prefix("Luau 0.")
+        .expect("_VERSION global is formatted incorrectly")
+        .trim();
+
+    if luau_version.is_empty() {
+        panic!("_VERSION global is missing version number")
+    }
+
+    lua.create_string(format!(
+        "Lune {lune}+{luau}",
+        lune = env!("CARGO_PKG_VERSION"),
+        luau = luau_version,
+    ))
 }