2 files changed, 104 insertions, 0 deletions
diff --git a/macros/cmd_system_macros/Cargo.toml b/macros/cmd_system_macros/Cargo.toml
new file mode 100644
index 0000000..4a91064
--- /dev/null
+++ b/macros/cmd_system_macros/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "cmd_system_macros"
+version.workspace = true
+edition = "2024"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1.0"
+quote = "1.0"
+syn = { version = "2.0", features = ["full", "extra-traits", "visit"] }
diff --git a/macros/cmd_system_macros/src/lib.rs b/macros/cmd_system_macros/src/lib.rs
new file mode 100644
index 0000000..e585782
--- /dev/null
+++ b/macros/cmd_system_macros/src/lib.rs
@@ -0,0 +1,92 @@
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::{Expr, ItemFn, Lit, Type, parse_macro_input, parse_quote};
+
+#[proc_macro_attribute]
+pub fn exec(_attr: TokenStream, item: TokenStream) -> TokenStream {
+    let input_fn = parse_macro_input!(item as ItemFn);
+    let fn_block = &input_fn.block;
+
+    let mut output_mappings = Vec::new();
+    extract_cmd_output_macros(fn_block, &mut output_mappings);
+
+    let mapping_fn = generate_mapping_function(&output_mappings);
+
+    let expanded = quote! {
+        #input_fn
+
+        #mapping_fn
+    };
+
+    TokenStream::from(expanded)
+}
+
+fn extract_cmd_output_macros(block: &syn::Block, mappings: &mut Vec<(String, syn::Type)>) {
+    use syn::visit::Visit;
+
+    struct CmdOutputVisitor<'a> {
+        mappings: &'a mut Vec<(String, syn::Type)>,
+    }
+
+    impl<'a> syn::visit::Visit<'a> for CmdOutputVisitor<'a> {
+        fn visit_macro(&mut self, mac: &'a syn::Macro) {
+            if mac.path.is_ident("cmd_output") {
+                let nested_result = syn::parse2::<syn::ExprTuple>(mac.tokens.clone());
+                if let Ok(nested) = nested_result {
+                    if nested.elems.len() < 2 {
+                        syn::visit::visit_macro(self, mac);
+                        return;
+                    }
+
+                    let first_elem = &nested.elems[0];
+                    let second_elem = &nested.elems[1];
+
+                    let type_path_opt = match first_elem {
+                        Expr::Path(path) => Some(path),
+                        _ => None,
+                    };
+
+                    let lit_str_opt = match second_elem {
+                        Expr::Lit(lit) => match &lit.lit {
+                            Lit::Str(lit_str) => Some(lit_str),
+                            _ => None,
+                        },
+                        _ => None,
+                    };
+
+                    if let (Some(type_path), Some(lit_str)) = (type_path_opt, lit_str_opt) {
+                        let type_name = lit_str.value();
+                        if let Some(type_ident) = type_path.path.get_ident() {
+                            let ty: Type = parse_quote!(#type_ident);
+                            self.mappings.push((type_name, ty));
+                        }
+                    }
+                }
+            }
+
+            syn::visit::visit_macro(self, mac);
+        }
+    }
+
+    let mut visitor = CmdOutputVisitor { mappings };
+    visitor.visit_block(block);
+}
+
+fn generate_mapping_function(mappings: &[(String, syn::Type)]) -> proc_macro2::TokenStream {
+    let mapping_entries: Vec<_> = mappings
+        .iter()
+        .map(|(name, ty)| {
+            quote! {
+                map.insert(#name.to_string(), std::any::TypeId::of::<#ty>());
+            }
+        })
+        .collect();
+
+    quote! {
+        fn get_output_type_mapping() -> std::collections::HashMap<String, std::any::TypeId> {
+            let mut map = std::collections::HashMap::new();
+            #(#mapping_entries)*
+            map
+        }
+    }
+}