Device config is now done through lua

automation_macro/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "automation_macro"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+quote = "1.0.36"
+syn = "2.0.60"

automation_macro/src/lib.rs

@@ -0,0 +1,54 @@
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::{parse_macro_input, DeriveInput};
+
+#[proc_macro_derive(LuaDevice, attributes(config))]
+pub fn lua_device_derive(input: TokenStream) -> TokenStream {
+    let ast = parse_macro_input!(input as DeriveInput);
+
+    impl_lua_device_macro(&ast)
+}
+
+fn impl_lua_device_macro(ast: &syn::DeriveInput) -> TokenStream {
+    let name = &ast.ident;
+    let name_string = name.to_string();
+    // TODO: Handle errors properly
+    // This includes making sure one, and only one config is specified
+    let config = if let syn::Data::Struct(syn::DataStruct {
+        fields: syn::Fields::Named(syn::FieldsNamed { ref named, .. }),
+        ..
+    }) = ast.data
+    {
+        named
+            .iter()
+            .find(|&field| {
+                field
+                    .attrs
+                    .iter()
+                    .any(|attr| attr.path().is_ident("config"))
+            })
+            .map(|field| field.ty.clone())
+            .unwrap()
+    } else {
+        unimplemented!()
+    };
+
+    let gen = quote! {
+        impl #name {
+            pub fn register_with_lua(lua: &mlua::Lua) -> mlua::Result<()> {
+                lua.globals().set(#name_string, lua.create_proxy::<#name>()?)
+            }
+        }
+        impl mlua::UserData for #name {
+            fn add_methods<'lua, M: mlua::UserDataMethods<'lua, Self>>(methods: &mut M) {
+                methods.add_function("new", |lua, config: mlua::Value| {
+                    let config: #config = mlua::LuaSerdeExt::from_value(lua, config)?;
+                    let config: Box<dyn crate::device_manager::DeviceConfig> = Box::new(config);
+                    Ok(config)
+                });
+            }
+        }
+    };
+
+    gen.into()
+}