Allow overriding BUNDLING_ATTRIBUTE in GMM

api/shadow.api

@@ -43,6 +43,7 @@ public final class com/github/jengelman/gradle/plugins/shadow/ShadowBasePlugin$C
 public abstract interface class com/github/jengelman/gradle/plugins/shadow/ShadowExtension {
 	public abstract fun getAddShadowVariantIntoJavaComponent ()Lorg/gradle/api/provider/Property;
 	public abstract fun getAddTargetJvmVersionAttribute ()Lorg/gradle/api/provider/Property;
+	public abstract fun getBundlingAttribute ()Lorg/gradle/api/provider/Property;
 }
 
 public abstract class com/github/jengelman/gradle/plugins/shadow/ShadowJavaPlugin : org/gradle/api/Plugin {

docs/changes/README.md

@@ -21,6 +21,14 @@
 - Support relocating Kotlin module files. ([#1539](https://github.com/GradleUp/shadow/pull/1539))  
   The current implementation relocates all properties in `KotlinModuleMetadata` but `KmModule.optionalAnnotationClasses`
   due to very limited usage of it. See more discussion [here](https://github.com/GradleUp/shadow/pull/1539#discussion_r2344237151).
+- Allow overriding `BUNDLING_ATTRIBUTE` in GMM. ([#1773](https://github.com/GradleUp/shadow/pull/1773))  
+  The `org.gradle.dependency.bundling` in shadowed JAR's Gradle Module Metadata is set to `shadowed` by default.
+  You can override it for now by:
+  ```kotlin
+  shadow {
+    bundlingAttribute = Bundling.EMBEDDED
+  }
+  ```
 
 ### Changed
 

docs/publishing/README.md

@@ -127,6 +127,28 @@ you can disable this by setting the `addTargetJvmVersionAttribute` property in t
     }
     ```
 
+The BUNDLING attribute (`org.gradle.dependency.bundling`) of the shadowed variant is set to `shadowed` by default,
+it is useful for consumers to distinguish between normal and shadowed dependencies. You can override this attribute by
+setting the `bundlingAttribute` property in the `shadow` extension:
+
+=== "Kotlin"
+
+    ```kotlin
+    shadow {
+      // Per description of the attribute, you should set it to either `Bundling.SHADOWED` or `Bundling.EMBEDDED`.
+      bundlingAttribute = Bundling.EMBEDDED
+    }
+    ```
+
+=== "Groovy"
+
+    ```groovy
+    shadow {
+      // Per description of the attribute, you should set it to either `Bundling.SHADOWED` or `Bundling.EMBEDDED`.
+      bundlingAttribute = Bundling.EMBEDDED
+    }
+    ```
+
 ## Shadow Configuration and Publishing
 
 The Shadow plugin provides a custom configuration (`configurations.shadow`) to specify

src/functionalTest/kotlin/com/github/jengelman/gradle/plugins/shadow/PublishingTest.kt

@@ -191,6 +191,33 @@ class PublishingTest : BasePluginTest() {
     )
   }
 
+  @Test
+  fun overrideBundlingAttrInGradleMetadata() {
+    projectScript.appendText(
+      publishConfiguration(
+        projectBlock = """
+          shadow {
+            bundlingAttribute = Bundling.EMBEDDED
+          }
+        """.trimIndent(),
+        shadowBlock = """
+          archiveClassifier = ''
+          archiveBaseName = 'maven-all'
+        """.trimIndent(),
+      ),
+    )
+
+    publish()
+
+    assertShadowVariantCommon(
+      gmm = gmmAdapter.fromJson(repoPath("my/maven-all/1.0/maven-all-1.0.module")),
+      variantAttrs = commonVariantAttrs + arrayOf(
+        Bundling.BUNDLING_ATTRIBUTE.name to Bundling.EMBEDDED,
+        Usage.USAGE_ATTRIBUTE.name to Usage.JAVA_RUNTIME,
+      ),
+    )
+  }
+
   @Test
   fun publishShadowJarInsteadOfJar() {
     projectScript.appendText(

src/main/kotlin/com/github/jengelman/gradle/plugins/shadow/ShadowBasePlugin.kt

@@ -8,6 +8,7 @@ import org.gradle.api.Plugin
 import org.gradle.api.Project
 import org.gradle.api.artifacts.Configuration
 import org.gradle.api.artifacts.ConfigurationContainer
+import org.gradle.api.attributes.Bundling
 import org.gradle.api.component.SoftwareComponentContainer
 import org.gradle.api.distribution.DistributionContainer
 import org.gradle.api.plugins.ExtensionContainer
@@ -22,6 +23,7 @@ public abstract class ShadowBasePlugin : Plugin<Project> {
     with(extensions.create(EXTENSION_NAME, ShadowExtension::class.java)) {
       addShadowVariantIntoJavaComponent.convention(true)
       addTargetJvmVersionAttribute.convention(true)
+      bundlingAttribute.convention(Bundling.SHADOWED)
     }
     @Suppress("EagerGradleConfiguration") // this should be created eagerly.
     configurations.create(CONFIGURATION_NAME)

src/main/kotlin/com/github/jengelman/gradle/plugins/shadow/ShadowExtension.kt

@@ -1,5 +1,6 @@
 package com.github.jengelman.gradle.plugins.shadow
 
+import org.gradle.api.attributes.Bundling
 import org.gradle.api.attributes.java.TargetJvmVersion
 import org.gradle.api.provider.Property
 
@@ -19,4 +20,13 @@ public interface ShadowExtension {
    * Defaults to `true`.
    */
   public val addTargetJvmVersionAttribute: Property<Boolean>
+
+  /**
+   * The [Bundling] attribute to use for the Gradle Module Metadata.
+   *
+   * Per description of the attribute, you should set it to either [Bundling.SHADOWED] or [Bundling.EMBEDDED].
+   *
+   * Defaults to [Bundling.SHADOWED].
+   */
+  public val bundlingAttribute: Property<String>
 }

src/main/kotlin/com/github/jengelman/gradle/plugins/shadow/ShadowJavaPlugin.kt

@@ -61,7 +61,10 @@ public abstract class ShadowJavaPlugin @Inject constructor(
           LibraryElements.LIBRARY_ELEMENTS_ATTRIBUTE,
           objects.named(LibraryElements::class.java, LibraryElements.JAR),
         )
-        attrs.attribute(Bundling.BUNDLING_ATTRIBUTE, objects.named(Bundling::class.java, Bundling.SHADOWED))
+        attrs.attributeProvider(
+          Bundling.BUNDLING_ATTRIBUTE,
+          shadow.bundlingAttribute.map { attr -> objects.named(Bundling::class.java, attr) },
+        )
       }
       it.outgoing.artifact(tasks.shadowJar)
     }

src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/ShadowPropertiesTest.kt

@@ -25,6 +25,7 @@ import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar.Companion.shad
 import org.gradle.api.Named
 import org.gradle.api.Project
 import org.gradle.api.Task
+import org.gradle.api.attributes.Bundling
 import org.gradle.api.file.DuplicatesStrategy
 import org.gradle.api.plugins.ApplicationPlugin
 import org.gradle.api.plugins.JavaPlugin
@@ -59,6 +60,7 @@ class ShadowPropertiesTest {
     with(extensions.getByType(ShadowExtension::class.java)) {
       assertThat(addShadowVariantIntoJavaComponent.get()).isTrue()
       assertThat(addTargetJvmVersionAttribute.get()).isTrue()
+      assertThat(bundlingAttribute.get()).isEqualTo(Bundling.SHADOWED)
     }
   }