From 8293b6971d238bab8320546a13f60a49d407016c Mon Sep 17 00:00:00 2001
From: Isaac Clayton <slightknack@gmail.com>
Date: Wed, 1 Jun 2022 11:15:06 +0200
Subject: [PATCH] Start sketching out runner runtime

---
 Cargo.lock                   | 41 ++++++++++++++++++++++++++++++++++++
 crates/runner/Cargo.toml     |  7 ++++++
 crates/runner/src/lib.rs     | 37 ++++++++++++++++++++++++++++++++
 crates/runner/src/main.rs    |  7 ++++++
 crates/runner/src/runtime.rs | 22 +++++++++++++++++++
 5 files changed, 114 insertions(+)
 create mode 100644 crates/runner/Cargo.toml
 create mode 100644 crates/runner/src/lib.rs
 create mode 100644 crates/runner/src/main.rs
 create mode 100644 crates/runner/src/runtime.rs

diff --git a/Cargo.lock b/Cargo.lock
index 8624921d97..442e10c60a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2627,6 +2627,24 @@ dependencies = [
  "url",
 ]
 
+[[package]]
+name = "lua-src"
+version = "544.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "708ba3c844d5e9d38def4a09dd871c17c370f519b3c4b7261fbabe4a613a814c"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "luajit-src"
+version = "210.3.4+resty073ac54"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "640b09e99575a442b4da0ef406a78188a1a4313bb9ead7b5b20ec12cc480130f"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "malloc_buf"
 version = "0.0.6"
@@ -2845,6 +2863,22 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "mlua"
+version = "0.8.0-beta.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4bb054c5769e1aeb137554b95941e997b62d17f5265bef213cb63179d75a6bf6"
+dependencies = [
+ "bstr",
+ "cc",
+ "lua-src",
+ "luajit-src",
+ "num-traits",
+ "once_cell",
+ "pkg-config",
+ "rustc-hash",
+]
+
 [[package]]
 name = "multimap"
 version = "0.8.3"
@@ -3971,6 +4005,13 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "runner"
+version = "0.1.0"
+dependencies = [
+ "mlua",
+]
+
 [[package]]
 name = "rust-embed"
 version = "6.4.0"
diff --git a/crates/runner/Cargo.toml b/crates/runner/Cargo.toml
new file mode 100644
index 0000000000..fe49be4bc9
--- /dev/null
+++ b/crates/runner/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "runner"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+mlua = { version = "0.8.0-beta.5", features = ["lua54", "vendored"] }
diff --git a/crates/runner/src/lib.rs b/crates/runner/src/lib.rs
new file mode 100644
index 0000000000..802755c961
--- /dev/null
+++ b/crates/runner/src/lib.rs
@@ -0,0 +1,37 @@
+use mlua::{Error, FromLua, Lua, ToLua, UserData};
+
+pub mod runtime;
+pub use runtime::*;
+
+impl Runtime for Lua {
+    type Module = String;
+    // type Error = Error;
+    type Interface = LuaInterface;
+
+    fn init(module: Self::Module) -> Option<Self> {
+        let lua = Lua::new();
+        lua.load(&module).exec().ok()?;
+        return Some(lua);
+    }
+
+    fn interface(&self) -> Self::Interface {
+        todo!()
+    }
+
+    fn val<'lua, K: ToLua<'lua>, V: FromLua<'lua>>(&'lua self, key: K) -> Option<V> {
+        self.globals().get(key).ok()
+    }
+}
+
+pub struct LuaInterface {
+    funs: Vec<String>,
+    vals: Vec<String>,
+}
+
+impl Interface for LuaInterface {
+    type Handle = String;
+
+    fn handles(&self) -> &[Self::Handle] {
+        todo!()
+    }
+}
diff --git a/crates/runner/src/main.rs b/crates/runner/src/main.rs
new file mode 100644
index 0000000000..d9ad57ecae
--- /dev/null
+++ b/crates/runner/src/main.rs
@@ -0,0 +1,7 @@
+use mlua::{Lua, Result};
+
+use runner::*;
+
+pub fn main() {
+    let lua: Lua = Runtime::init("x = 7".to_string()).unwrap();
+}
diff --git a/crates/runner/src/runtime.rs b/crates/runner/src/runtime.rs
new file mode 100644
index 0000000000..921c274719
--- /dev/null
+++ b/crates/runner/src/runtime.rs
@@ -0,0 +1,22 @@
+use mlua::{FromLua, ToLua};
+
+pub trait FromRuntime: Sized {
+    fn from_runtime() -> Option<Self>;
+}
+
+pub trait Interface {
+    type Handle;
+    fn handles(&self) -> &[Self::Handle];
+}
+
+pub trait Runtime
+where
+    Self: Sized,
+{
+    type Module;
+    type Interface: Interface;
+
+    fn init(plugin: Self::Module) -> Option<Self>;
+    fn interface(&self) -> Self::Interface;
+    fn val<'lua, K: ToLua<'lua>, V: FromLua<'lua>>(&'lua self, key: K) -> Option<V>;
+}