From 16d1f88653c6226709fbca609e4cd1dd12cac066 Mon Sep 17 00:00:00 2001
From: Mateusz Kubuszok <mateusz.kubuszok@gmail.com>
Date: Fri, 15 Sep 2023 13:29:44 +0200
Subject: [PATCH] Ignore implicit summoning when overrides are not empty

---
 .../compiletime/derivation/transformer/Configurations.scala | 6 +++++-
 .../transformer/rules/TransformImplicitRuleModule.scala     | 4 ++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/chimney/src/main/scala/io/scalaland/chimney/internal/compiletime/derivation/transformer/Configurations.scala b/chimney/src/main/scala/io/scalaland/chimney/internal/compiletime/derivation/transformer/Configurations.scala
index 163c3dbd0..2fb2869c8 100644
--- a/chimney/src/main/scala/io/scalaland/chimney/internal/compiletime/derivation/transformer/Configurations.scala
+++ b/chimney/src/main/scala/io/scalaland/chimney/internal/compiletime/derivation/transformer/Configurations.scala
@@ -95,7 +95,8 @@ private[compiletime] trait Configurations { this: Derivation =>
       //   }}}
       copy(
         preventResolutionForTypes = None,
-        fieldOverrides = Map.empty
+        fieldOverrides = Map.empty,
+        coproductOverrides = Map.empty
       )
 
     def addFieldOverride(fieldName: String, fieldOverride: RuntimeFieldOverride): TransformerConfig =
@@ -108,6 +109,9 @@ private[compiletime] trait Configurations { this: Derivation =>
     ): TransformerConfig =
       copy(coproductOverrides = coproductOverrides + ((instanceType, targetType) -> coproductOverride))
 
+    def areOverridesEmpty: Boolean =
+      fieldOverrides.isEmpty && coproductOverrides.isEmpty
+
     def withDefinitionScope(defScope: (??, ??)): TransformerConfig =
       copy(preventResolutionForTypes = Some(defScope))
 
diff --git a/chimney/src/main/scala/io/scalaland/chimney/internal/compiletime/derivation/transformer/rules/TransformImplicitRuleModule.scala b/chimney/src/main/scala/io/scalaland/chimney/internal/compiletime/derivation/transformer/rules/TransformImplicitRuleModule.scala
index 2ca41aff4..5fd70dd34 100644
--- a/chimney/src/main/scala/io/scalaland/chimney/internal/compiletime/derivation/transformer/rules/TransformImplicitRuleModule.scala
+++ b/chimney/src/main/scala/io/scalaland/chimney/internal/compiletime/derivation/transformer/rules/TransformImplicitRuleModule.scala
@@ -10,6 +10,10 @@ private[compiletime] trait TransformImplicitRuleModule { this: Derivation =>
 
     def expand[From, To](implicit ctx: TransformationContext[From, To]): DerivationResult[Rule.ExpansionResult[To]] =
       ctx match {
+        case _ if !ctx.config.areOverridesEmpty =>
+          DerivationResult.log(
+            "Configuration has defined overrides - implicit summoning is skipped"
+          ) >> DerivationResult.attemptNextRule
         case TransformationContext.ForTotal(src) =>
           summonTransformerSafe[From, To].fold(DerivationResult.attemptNextRule[To]) { totalTransformer =>
             // We're constructing: