fix: warning should only fire once

Author: kfc35

crates/bevy_pbr/Cargo.toml

@@ -42,6 +42,7 @@ bevy_derive = { path = "../bevy_derive", version = "0.18.0-dev" }
 bevy_diagnostic = { path = "../bevy_diagnostic", version = "0.18.0-dev" }
 bevy_ecs = { path = "../bevy_ecs", version = "0.18.0-dev" }
 bevy_light = { path = "../bevy_light", version = "0.18.0-dev" }
+bevy_log = { path = "../bevy_log", version = "0.18.0-dev" }
 bevy_image = { path = "../bevy_image", version = "0.18.0-dev" }
 bevy_mesh = { path = "../bevy_mesh", version = "0.18.0-dev", features = [
   "morph",

crates/bevy_pbr/src/render/gpu_preprocess.rs

@@ -26,6 +26,7 @@ use bevy_ecs::{
     system::{lifetimeless::Read, Commands, Query, Res, ResMut},
     world::{FromWorld, World},
 };
+use bevy_log::warn_once;
 use bevy_render::{
     batching::gpu_preprocessing::{
         BatchedInstanceBuffers, GpuOcclusionCullingWorkItemBuffers, GpuPreprocessingMode,
@@ -838,7 +839,7 @@ impl Node for LateGpuPreprocessNode {
 
         // Fetch the pipeline.
         let Some(preprocess_pipeline_id) = maybe_pipeline_id else {
-            warn!("The build mesh uniforms pipeline wasn't ready");
+            warn_once!("The build mesh uniforms pipeline wasn't ready");
             return Ok(());
         };