remove pointless async runtime

Cargo.toml

@@ -16,13 +16,9 @@ features = ["js-esbuild"]
 
 [dependencies.mlua]
 version = "0.6.3"
-features = ["async", "lua54", "macros", "serialize", "send"]
+features = ["luajit", "macros", "serialize"]
 
 [dependencies.serde]
 version = "1.0.130"
 features = ["derive"]
 
-[dependencies.tokio]
-version = "1.11.0"
-features = ["rt-multi-thread", "macros", "fs"]
-

src/main.rs

@@ -10,16 +10,14 @@ struct Opt {
     infile: PathBuf,
 }
 
-#[tokio::main]
-async fn main() -> anyhow::Result<()> {
+fn main() -> anyhow::Result<()> {
     let opt = Opt::from_args();
 
-    let s_data = script::run_buildscript(opt.infile).await?;
+    let s_data = script::run_buildscript(opt.infile)?;
     let path = s_data.outfile.clone();
     let rendered = renderer::render(s_data)?;
 
-    tokio::fs::write(path, rendered)
-        .await
+    std::fs::write(path, rendered)
         .context("failed to write outfile")?;
 
     Ok(())

src/script.rs

@@ -2,12 +2,12 @@ use mlua::{Lua, LuaSerdeExt};
 use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
 
-pub async fn run_buildscript(infile: PathBuf) -> anyhow::Result<ScriptData> {
-    let script = tokio::fs::read(infile).await?;
+pub fn run_buildscript(infile: PathBuf) -> anyhow::Result<ScriptData> {
+    let script = std::fs::read(infile)?;
 
     // required to allow C lua libs
     let lua = unsafe { Lua::unsafe_new() };
-    lua.load(&script).exec_async().await?;
+    lua.load(&script).exec()?;
 
     let sdata = lua.from_value_with(
         mlua::Value::Table(lua.globals()),