[gradle-plugin] expose the outgoing variants (#6329)

* Directly expose the outgoing variants

* Add @ApolloExperimental

* Fix KDoc

libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo/gradle/api/ApolloExtension.kt

@@ -90,9 +90,6 @@ interface ApolloExtension {
    */
   val generateSourcesDuringGradleSync: Property<Boolean>
 
-  @ApolloExperimental
-  val useGradleVariants: Property<Boolean>
-
   /**
    * Common apollo dependencies using the same version as the Apollo Gradle Plugin currently in the classpath
    */

libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo/gradle/api/Service.kt

@@ -11,6 +11,8 @@ import com.apollographql.apollo.compiler.OperationOutputGenerator
 import com.apollographql.apollo.compiler.PackageNameGenerator
 import org.gradle.api.Action
 import org.gradle.api.Task
+import org.gradle.api.artifacts.Configuration
+import org.gradle.api.component.SoftwareComponent
 import org.gradle.api.file.ConfigurableFileCollection
 import org.gradle.api.file.Directory
 import org.gradle.api.file.DirectoryProperty
@@ -914,4 +916,32 @@ interface Service {
 
   @ApolloExperimental
   fun plugin(dependencyNotation: Any, block: Action<CompilerPlugin>)
+
+  /**
+   * Overrides the way the outgoing variants are connected.
+   * Use this to publish the metadata to an already existing software component.
+   *
+   * By default, a new software component named "apollo" is created.
+   *
+   * ```kotlin
+   * service("service") {
+   *   outgoingVariantsConnection {
+   *     addToSoftwareComponent("java")
+   *   }
+   * }
+   * ```
+   */
+  @ApolloExperimental
+  fun outgoingVariantsConnection(action: Action<in OutgoingVariantsConnection>)
+
+  /**
+   * An [OutgoingVariantsConnection] defines how outgoing variants are added to software components.
+   */
+  @ApolloExperimental
+  interface OutgoingVariantsConnection {
+    fun addToSoftwareComponent(name: String)
+    fun addToSoftwareComponent(softwareComponent: SoftwareComponent)
+
+    val outgoingVariants: List<Configuration>
+  }
 }

libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo/gradle/internal/DefaultApolloExtension.kt

@@ -24,6 +24,7 @@ import org.gradle.api.artifacts.ProjectDependency
 import org.gradle.api.attributes.HasConfigurableAttributes
 import org.gradle.api.attributes.Usage
 import org.gradle.api.component.AdhocComponentWithVariants
+import org.gradle.api.component.SoftwareComponent
 import org.gradle.api.component.SoftwareComponentFactory
 import org.gradle.api.file.FileCollection
 import org.gradle.api.file.SourceDirectorySet
@@ -35,7 +36,6 @@ import org.gradle.util.GradleVersion
 import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
 import org.jetbrains.kotlin.gradle.targets.js.KotlinJsTarget
 import java.io.File
-import java.lang.reflect.Field
 import java.util.concurrent.Callable
 import javax.inject.Inject
 
@@ -50,7 +50,9 @@ abstract class DefaultApolloExtension(
   private val generateApolloSources: TaskProvider<Task>
   private var hasExplicitService = false
   private val adhocComponentWithVariants: AdhocComponentWithVariants by lazy {
-    project.adhocComponentWithVariants()
+    softwareComponentFactory.adhoc("apollo").also {
+      project.components.add(it)
+    }
   }
   private val apolloMetadataConfiguration: Configuration
   private var apolloBuildServiceProvider: Provider<ApolloBuildService>
@@ -576,10 +578,28 @@ abstract class DefaultApolloExtension(
        * - downstream module publishes jar
        * In such scenarios, the user must set `alwaysGenerateTypesMatching.set(listOf(".*"))` on the schema module.
        */
-      adhocComponentWithVariants.addVariantsFromConfiguration(codegenMetadata.consumable) {}
-      adhocComponentWithVariants.addVariantsFromConfiguration(upstreamIr.consumable) {}
-      adhocComponentWithVariants.addVariantsFromConfiguration(codegenSchema.consumable) {}
-      adhocComponentWithVariants.addVariantsFromConfiguration(otherOptions.consumable) {}
+      val outgoingVariantsConnection = object : Service.OutgoingVariantsConnection {
+        override fun addToSoftwareComponent(name: String) {
+          addToSoftwareComponent(project.components.getByName(name))
+        }
+
+        override fun addToSoftwareComponent(softwareComponent: SoftwareComponent) {
+          check (softwareComponent is AdhocComponentWithVariants) {
+            "Software component '$softwareComponent' is not an instance of AdhocComponentWithVariants"
+          }
+          outgoingVariants.forEach {
+            softwareComponent.addVariantsFromConfiguration(it) {  }
+          }
+        }
+
+        override val outgoingVariants: List<Configuration>
+          get() = listOf(codegenMetadata.consumable, upstreamIr.consumable, codegenSchema.consumable, otherOptions.consumable)
+      }
+      if (service.outgoingVariantsConnection != null) {
+        service.outgoingVariantsConnection!!.execute(outgoingVariantsConnection)
+      } else {
+        outgoingVariantsConnection.addToSoftwareComponent(adhocComponentWithVariants)
+      }
 
       service.upstreamDependencies.forEach {
         otherOptions.scope.dependencies.add(it)
@@ -1035,27 +1055,6 @@ abstract class DefaultApolloExtension(
   }
 
   override val deps: ApolloDependencies = ApolloDependencies(project.dependencies)
-
-  private fun Project.adhocComponentWithVariants(): AdhocComponentWithVariants {
-    if (useGradleVariants.getOrElse(false)) {
-      val javaComponent = project.components.findByName("java")
-      if (javaComponent != null) {
-        // JVM
-        return javaComponent as AdhocComponentWithVariants
-      }
-
-      val kotlin = project.kotlinMultiplatformExtension
-      if (kotlin != null) {
-        error("Adding variants to multiplatform project is not possible. See https://youtrack.jetbrains.com/issue/KT-58830/")
-      }
-
-      error("Impossible to find an AdHocComponent")
-    } else {
-      return softwareComponentFactory.adhoc("apollo").also {
-        project.components.add(it)
-      }
-    }
-  }
 }
 
 

libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo/gradle/internal/DefaultService.kt

@@ -120,6 +120,7 @@ abstract class DefaultService @Inject constructor(val project: Project, override
 
   var operationOutputAction: Action<in Service.OperationOutputConnection>? = null
   var operationManifestAction: Action<in Service.OperationManifestConnection>? = null
+  var outgoingVariantsConnection: Action<in Service.OutgoingVariantsConnection>? = null
 
   @Deprecated("Use operationManifestConnection", replaceWith = ReplaceWith("operationManifestConnection"))
   @ApolloDeprecatedSince(ApolloDeprecatedSince.Version.v4_0_0)
@@ -133,12 +134,20 @@ abstract class DefaultService @Inject constructor(val project: Project, override
 
   override fun operationManifestConnection(action: Action<in Service.OperationManifestConnection>) {
     check(!registered) {
-      "Apollo: operationOutputConnection {} cannot be configured outside of a service {} block"
+      "Apollo: operationManifestConnection {} cannot be configured outside of a service {} block"
     }
 
     this.operationManifestAction = action
   }
 
+  override fun outgoingVariantsConnection(action: Action<in Service.OutgoingVariantsConnection>) {
+    check(!registered) {
+      "Apollo: outgoingVariantsConnection {} cannot be configured outside of a service {} block"
+    }
+
+    this.outgoingVariantsConnection = action
+  }
+
   var outputDirAction: Action<in Service.DirectoryConnection>? = null
 
   override fun outputDirConnection(action: Action<in Service.DirectoryConnection>) {

libraries/apollo-gradle-plugin/testProjects/multi-modules-publishing-producer/fragments/build.gradle.kts

@@ -13,15 +13,19 @@ dependencies {
 }
 
 apollo {
-  useGradleVariants.set(true)
-
   service("service1") {
     packageName.set("com.service1")
     dependsOn(project(":schema"))
+    outgoingVariantsConnection {
+      addToSoftwareComponent("java")
+    }
   }
   service("service2") {
     packageName.set("com.service2")
     dependsOn(project(":schema"))
+    outgoingVariantsConnection {
+      addToSoftwareComponent("java")
+    }
   }
 }
 

libraries/apollo-gradle-plugin/testProjects/multi-modules-publishing-producer/schema/build.gradle.kts

@@ -13,17 +13,21 @@ dependencies {
 }
 
 apollo {
-  useGradleVariants.set(true)
-
   service("service1") {
     packageName.set("com.service1")
     generateApolloMetadata.set(true)
     alwaysGenerateTypesMatching.add(".*")
+    outgoingVariantsConnection {
+      addToSoftwareComponent("java")
+    }
   }
   service("service2") {
     packageName.set("com.service2")
     generateApolloMetadata.set(true)
     alwaysGenerateTypesMatching.add(".*")
+    outgoingVariantsConnection {
+      addToSoftwareComponent("java")
+    }
   }
 }