feat: add ingress score (#32)

Co-authored-by: tahahawa <tahahawa@gmail.com>
Reviewed-on: #32
Reviewed-by: wjro <wrolleman@nationtech.io>

harmony_macros/src/lib.rs

@@ -116,3 +116,19 @@ pub fn yaml(input: TokenStream) -> TokenStream {
     }
     .into()
 }
+
+/// Verify that a string is a valid(ish) ingress path
+/// Panics if path does not start with `/`
+#[proc_macro]
+pub fn ingress_path(input: TokenStream) -> TokenStream {
+    let input = parse_macro_input!(input as LitStr);
+    let path_str = input.value();
+
+    match path_str.starts_with("/") {
+        true => {
+            let expanded = quote! {(#path_str.to_string()) };
+            return TokenStream::from(expanded);
+        }
+        false => panic!("Invalid ingress path"),
+    }
+}