Add Gradle test for KT-51913

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/KotlinGradlePluginIT.kt

@@ -785,4 +785,15 @@ class KotlinGradleIT : KGPBaseTest() {
             build("tasks")
         }
     }
+
+    @DisplayName("KT-51913: KGP should not add attributes to 'legacy' configurations")
+    @GradleTest
+    fun noAttributesLegacyConfigurations(gradleVersion: GradleVersion) {
+        project(
+            "legacyConfigurationConsumer",
+            gradleVersion
+        ) {
+            build(":consumer:aggregate")
+        }
+    }
 }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/legacyConfigurationConsumer/build.gradle.kts

@@ -0,0 +1,6 @@
+subprojects {
+    repositories {
+        mavenLocal()
+        mavenCentral()
+    }
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/legacyConfigurationConsumer/consumer/build.gradle.kts

@@ -0,0 +1,36 @@
+plugins {
+    id("base")
+}
+
+val aggregation by configurations.creating {
+    isCanBeConsumed = false
+    isCanBeResolved = true
+    attributes {
+        attribute(Category.CATEGORY_ATTRIBUTE, objects.named(Category.DOCUMENTATION))
+        attribute(Usage.USAGE_ATTRIBUTE, objects.named("custom-aggregation-for-reporting"))
+        attribute(Attribute.of("custom-attribute-type", String::class.java), "custom-attribute-value")
+    }
+}
+
+dependencies {
+    val projectPath = path
+    rootProject.subprojects {
+        if (path != projectPath) {
+            aggregation(project)
+        }
+    }
+}
+
+val matches = aggregation.incoming.artifactView { lenient(true) }
+
+tasks.register("aggregate") {
+    inputs.files(matches.files).withPropertyName("matches")
+    doFirst {
+        matches.files.forEach {
+            if (it.extension != "txt") {
+                throw GradleException("Not a text file: $it")
+            }
+            println("$it: ${it.readText()}")
+        }
+    }
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/legacyConfigurationConsumer/kotlin-module/build.gradle.kts

@@ -0,0 +1,4 @@
+plugins {
+    kotlin("jvm")
+    id("java-library")
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/legacyConfigurationConsumer/kotlin-module/src/main/java/com/example/utilities/StringUtils.java

@@ -0,0 +1,5 @@
+package com.example.utilities;
+
+public class StringUtils {
+
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/legacyConfigurationConsumer/producer/build.gradle.kts

@@ -0,0 +1,25 @@
+plugins {
+    id("base")
+}
+
+val publishedFile = layout.buildDirectory.file("publication/output.txt")
+
+val producerTask by tasks.registering {
+    outputs.file(publishedFile)
+    doLast {
+        publishedFile.get().asFile.writeText("Hello World from ${project.name}")
+    }
+}
+
+configurations.create("publication") {
+    isCanBeConsumed = true
+    isCanBeResolved = false
+    outgoing.artifact(producerTask) {
+        builtBy(producerTask)
+    }
+    attributes {
+        attribute(Category.CATEGORY_ATTRIBUTE, objects.named(Category.DOCUMENTATION))
+        attribute(Usage.USAGE_ATTRIBUTE, objects.named("custom-aggregation-for-reporting"))
+        attribute(Attribute.of("custom-attribute-type", String::class.java), "custom-attribute-value")
+    }
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/legacyConfigurationConsumer/settings.gradle.kts

@@ -0,0 +1,5 @@
+rootProject.name = "kotlin-plugin-attributes"
+
+include("producer")
+include("consumer")
+include("kotlin-module")