Fix print and warn globals yielding

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fixed the `print` and `warn` global functions yielding the thread, preventing them from being used in places such as the callback to `table.sort`.
 - Fixed the `overwrite` option for `fs.move` not correctly removing existing files / directories. ([#133])
 
 [#133]: https://github.com/filiptibell/lune/pull/133

src/lune/globals/print.rs

@@ -1,14 +1,23 @@
 use mlua::prelude::*;
-use tokio::io::{self, AsyncWriteExt};
+use tokio::{
+    io::{self, AsyncWriteExt},
+    task,
+};
 
-use crate::lune::{scheduler::LuaSchedulerExt, util::formatting::pretty_format_multi_value};
+use crate::lune::util::formatting::pretty_format_multi_value;
 
-pub fn create(lua: &'static Lua) -> LuaResult<impl IntoLua<'_>> {
+pub fn create(lua: &Lua) -> LuaResult<impl IntoLua<'_>> {
-    lua.create_async_function(|_, args: LuaMultiValue| async move {
+    lua.create_function(|_, args: LuaMultiValue| {
         let formatted = format!("{}\n", pretty_format_multi_value(&args)?);
+        task::spawn(async move {
+            let _res = async move {
                 let mut stdout = io::stdout();
                 stdout.write_all(formatted.as_bytes()).await?;
                 stdout.flush().await?;
+                Ok::<_, LuaError>(())
+            };
+            // FUTURE: Send any error back to scheduler and emit it properly
+        });
         Ok(())
     })
 }

src/lune/globals/warn.rs

@@ -1,21 +1,27 @@
 use mlua::prelude::*;
-use tokio::io::{self, AsyncWriteExt};
+use tokio::{
-
+    io::{self, AsyncWriteExt},
-use crate::lune::{
+    task,
-    scheduler::LuaSchedulerExt,
-    util::formatting::{format_label, pretty_format_multi_value},
 };
 
-pub fn create(lua: &'static Lua) -> LuaResult<impl IntoLua<'_>> {
+use crate::lune::util::formatting::{format_label, pretty_format_multi_value};
-    lua.create_async_function(|_, args: LuaMultiValue| async move {
+
+pub fn create(lua: &Lua) -> LuaResult<impl IntoLua<'_>> {
+    lua.create_function(|_, args: LuaMultiValue| {
         let formatted = format!(
             "{}\n{}\n",
             format_label("warn"),
             pretty_format_multi_value(&args)?
         );
+        task::spawn(async move {
+            let _res = async move {
                 let mut stdout = io::stderr();
                 stdout.write_all(formatted.as_bytes()).await?;
                 stdout.flush().await?;
+                Ok::<_, LuaError>(())
+            };
+            // FUTURE: Send any error back to scheduler and emit it properly
+        });
         Ok(())
     })
 }