build(ariadne): vendor serde crates

third_party/crates/serde_derive-1.0.229/src/dummy.rs

@@ -0,0 +1,31 @@
+use proc_macro2::TokenStream;
+use quote::quote;
+
+pub fn wrap_in_const(serde_path: Option<&syn::Path>, code: TokenStream) -> TokenStream {
+    let use_serde = match serde_path {
+        Some(path) => quote! {
+            use #path as _serde;
+        },
+        None => quote! {
+            #[allow(unused_extern_crates, clippy::useless_attribute)]
+            extern crate serde as _serde;
+        },
+    };
+
+    quote! {
+        #[doc(hidden)]
+        #[allow(
+            non_upper_case_globals,
+            unused_attributes,
+            unused_qualifications,
+            clippy::absolute_paths,
+        )]
+        const _: () = {
+            #use_serde
+
+            _serde::__require_serde_not_serde_core!();
+
+            #code
+        };
+    }
+}