From 99cfe85944173bd72d1837f7aea4eb0f996dbd0c Mon Sep 17 00:00:00 2001
From: Jeff Charles <jeff.charles@shopify.com>
Date: Wed, 29 Oct 2025 15:30:44 -0400
Subject: [PATCH] Shadow eprintln in prelude to force users off of it

---
 shopify_function/src/lib.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/shopify_function/src/lib.rs b/shopify_function/src/lib.rs
index e1d190d..2a062f3 100644
--- a/shopify_function/src/lib.rs
+++ b/shopify_function/src/lib.rs
@@ -28,6 +28,8 @@ pub use shopify_function_macro::{shopify_function, typegen, Deserialize};
 pub mod scalars;
 
 pub mod prelude {
+    #[allow(deprecated)]
+    pub use crate::eprintln;
     pub use crate::log;
     pub use crate::scalars::*;
     pub use shopify_function_macro::{shopify_function, typegen, Deserialize};
@@ -61,6 +63,12 @@ macro_rules! log {
     };
 }
 
+#[macro_export]
+#[deprecated(note = "Use log! instead")]
+macro_rules! eprintln {
+    ($($tt:tt)*) => { std::eprintln!($($tt)*) }
+}
+
 pub use shopify_function_wasm_api as wasm_api;
 
 #[cfg(test)]