Prepare for task scheduler, improve error formatting

src/cli/cli.rs

@@ -3,7 +3,7 @@ use std::fs::read_to_string;
 use anyhow::Result;
 use clap::{CommandFactory, Parser};
 
-use lune::Lune;
+use lune::run_lune;
 
 use crate::utils::{files::find_parse_file_path, github::Client as GithubClient};
 
@@ -96,11 +96,7 @@ impl Cli {
         // Display the file path relative to cwd with no extensions in stack traces
         let file_display_name = file_path.with_extension("").display().to_string();
         // Create a new lune object with all globals & run the script
-        Lune::new()?
-            .with_args(self.script_args)?
-            .with_default_globals()?
-            .run_with_name(&file_contents, &file_display_name)
-            .await?;
+        run_lune(&file_display_name, &file_contents, self.script_args).await?;
         Ok(())
     }
 }

src/lib/globals/mod.rs

@@ -9,3 +9,5 @@ pub use fs::new as new_fs;
 pub use net::new as new_net;
 pub use process::new as new_process;
 pub use task::new as new_task;
+
+pub use task::WaitingThread as WaitingTaskThread;

src/lib/globals/task.rs

@@ -1,13 +1,24 @@
-use std::time::Duration;
+use std::{
+    sync::{Arc, Mutex},
+    time::Duration,
+};
 
-use mlua::{Function, Lua, Result, Table, Value, Variadic};
+use mlua::{Function, Lua, Result, Table, Thread, Value, Variadic};
 use tokio::time;
 
 use crate::utils::table_builder::ReadonlyTableBuilder;
 
 const DEFAULT_SLEEP_DURATION: f32 = 1.0 / 60.0;
 
-pub fn new(lua: &Lua) -> Result<Table> {
+pub struct WaitingThread<'a> {
+    is_delayed_for: Option<f32>,
+    is_deferred: Option<bool>,
+    thread: Thread<'a>,
+    args: Variadic<Value<'a>>,
+}
+
+pub fn new<'a>(lua: &'a Lua, threads: &Arc<Mutex<Vec<WaitingThread<'a>>>>) -> Result<Table<'a>> {
+    // TODO: Figure out how to insert into threads vec
     ReadonlyTableBuilder::new(lua)?
         .with_async_function(
             "defer",

src/lib/lib.rs

@@ -1,4 +1,6 @@
-use anyhow::Result;
+use std::sync::{Arc, Mutex};
+
+use anyhow::{bail, Result};
 use mlua::Lua;
 
 pub mod globals;
@@ -6,63 +8,39 @@ pub mod utils;
 
 use crate::{
     globals::{new_console, new_fs, new_net, new_process, new_task},
-    utils::formatting::{pretty_print_luau_error, print_label},
+    utils::formatting::{format_label, pretty_format_luau_error},
 };
 
-pub struct Lune {
-    lua: Lua,
-    args: Vec<String>,
-}
-
-impl Lune {
-    pub fn new() -> Result<Self> {
+pub async fn run_lune(name: &str, chunk: &str, args: Vec<String>) -> Result<()> {
     let lua = Lua::new();
+    let threads = Arc::new(Mutex::new(Vec::new()));
     lua.sandbox(true)?;
-        Ok(Self { lua, args: vec![] })
-    }
-
-    pub fn with_args(mut self, args: Vec<String>) -> Result<Self> {
-        self.args = args;
-        Ok(self)
-    }
-
-    pub fn with_default_globals(self) -> Result<Self> {
+    // Add in all globals
     {
-            let globals = self.lua.globals();
-            globals.raw_set("console", new_console(&self.lua)?)?;
-            globals.raw_set("fs", new_fs(&self.lua)?)?;
-            globals.raw_set("net", new_net(&self.lua)?)?;
-            globals.raw_set("process", new_process(&self.lua, self.args.clone())?)?;
-            globals.raw_set("task", new_task(&self.lua)?)?;
+        let globals = lua.globals();
+        globals.raw_set("console", new_console(&lua)?)?;
+        globals.raw_set("fs", new_fs(&lua)?)?;
+        globals.raw_set("net", new_net(&lua)?)?;
+        globals.raw_set("process", new_process(&lua, args.clone())?)?;
+        globals.raw_set("task", new_task(&lua, &threads)?)?;
         globals.set_readonly(true);
     }
-        Ok(self)
-    }
-
-    pub async fn run(&self, chunk: &str) -> Result<()> {
-        self.handle_result(self.lua.load(chunk).exec_async().await)
-    }
-
-    pub async fn run_with_name(&self, chunk: &str, name: &str) -> Result<()> {
-        self.handle_result(self.lua.load(chunk).set_name(name)?.exec_async().await)
-    }
-
-    fn handle_result(&self, result: mlua::Result<()>) -> Result<()> {
+    // Run the requested chunk asynchronously
+    let result = lua.load(chunk).set_name(name)?.exec_async().await;
     match result {
         Ok(_) => Ok(()),
-            Err(e) => {
-                eprintln!();
-                print_label("ERROR").unwrap();
-                eprintln!();
-                pretty_print_luau_error(&e);
-                Err(e.into())
-            }
-        }
+        Err(e) => bail!(
+            "\n{}\n{}",
+            format_label("ERROR"),
+            pretty_format_luau_error(&e)
+        ),
     }
 }
 
 #[cfg(test)]
 mod tests {
+    use crate::run_lune;
+
     macro_rules! run_tests {
         ($($name:ident: $value:expr,)*) => {
             $(
@@ -75,16 +53,10 @@ mod tests {
                     let path = std::env::current_dir()
                         .unwrap()
                         .join(format!("src/tests/{}.luau", $value));
-                    let lune = crate::Lune::new()
-                        .unwrap()
-                        .with_args(args)
-                        .unwrap()
-                        .with_default_globals()
-                        .unwrap();
                     let script = tokio::fs::read_to_string(&path)
                         .await
                         .unwrap();
-                    if let Err(e) = lune.run_with_name(&script, $value).await {
+                    if let Err(e) = run_lune($value, &script, args).await {
                         panic!("Test '{}' failed!\n{}", $value, e.to_string())
                     }
                 }

src/lib/utils/formatting.rs

@@ -39,8 +39,8 @@ fn can_be_plain_lua_table_key(s: &mlua::String) -> bool {
     }
 }
 
-pub fn print_label<S: AsRef<str>>(s: S) -> mlua::Result<()> {
-    print!(
+pub fn format_label<S: AsRef<str>>(s: S) -> String {
+    format!(
         "{}[{}{}{}{}]{} ",
         STYLE_BOLD,
         match s.as_ref().to_ascii_lowercase().as_str() {
@@ -53,7 +53,11 @@ pub fn print_label<S: AsRef<str>>(s: S) -> mlua::Result<()> {
         COLOR_RESET,
         STYLE_BOLD,
         STYLE_RESET
-    );
+    )
+}
+
+pub fn print_label<S: AsRef<str>>(s: S) -> mlua::Result<()> {
+    print!("{}", format_label(s));
     flush_stdout()?;
     Ok(())
 }
@@ -186,34 +190,45 @@ pub fn pretty_format_multi_value(multi: &MultiValue) -> mlua::Result<String> {
     Ok(buffer)
 }
 
-pub fn pretty_print_luau_error(e: &mlua::Error) {
+pub fn pretty_format_luau_error(e: &mlua::Error) -> String {
     match e {
         mlua::Error::RuntimeError(e) => {
-            eprintln!("{e}");
+            let err_string = e.to_string();
+            let mut err_lines = err_string.lines().collect::<Vec<_>>();
+            for (index, line) in err_lines.clone().iter().enumerate().rev() {
+                if *line == "stack traceback:" {
+                    err_lines[index] = "Stack Begin";
+                    break;
+                }
+            }
+            err_lines.push("Stack End");
+            err_lines.join("\n")
         }
         mlua::Error::CallbackError { cause, traceback } => {
-            pretty_print_luau_error(cause.as_ref());
-            eprintln!("Traceback:");
-            eprintln!("{}", traceback.strip_prefix("stack traceback:\n").unwrap());
+            format!(
+                "{}\nStack Begin{}Stack End",
+                pretty_format_luau_error(cause.as_ref()),
+                traceback.strip_prefix("stack traceback:\n").unwrap()
+            )
         }
         mlua::Error::ToLuaConversionError { from, to, message } => {
             let msg = message
                 .clone()
                 .map_or_else(String::new, |m| format!("\nDetails:\n\t{m}"));
-            eprintln!(
+            format!(
                 "Failed to convert Rust type '{}' into Luau type '{}'!{}",
                 from, to, msg
-            );
+            )
         }
         mlua::Error::FromLuaConversionError { from, to, message } => {
             let msg = message
                 .clone()
                 .map_or_else(String::new, |m| format!("\nDetails:\n\t{m}"));
-            eprintln!(
+            format!(
                 "Failed to convert Luau type '{}' into Rust type '{}'!{}",
                 from, to, msg
-            );
+            )
         }
-        e => eprintln!("{e}"),
+        e => format!("{e}"),
     }
 }