Create kapt configurations before gradle script is evaluated

We cannot create kapt configurations in `KotlinGradleSubplugin.apply`,
because `apply` is invoked after a script is evaluated, so user cannot
refer to kapt configurations in script.

We cannot call `apply` before script's evaluation, because
then we might not be able to determine
if a Gradle plugin corresponding to a subplugin is appled.
For example in case of the following script:
```
apply plugin: "kotlin"
apply plugin: "kotlin-kapt"
```
subplugin's apply will exit early because Gradle plugin "kotlin-kapt"
is not applied yet, when "kotlin"'s apply is evaluated.

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/Kapt3KotlinGradleSubplugin.kt

@@ -90,6 +90,23 @@ class Kapt3KotlinGradleSubplugin : KotlinGradleSubplugin<KotlinCompile> {
         }
 
         fun findMainKaptConfiguration(project: Project) = project.findKaptConfiguration(MAIN_KAPT_CONFIGURATION_NAME)
+
+        fun createAptConfigurationIfNeeded(project: Project, sourceSetName: String): Configuration {
+            val configurationName = Kapt3KotlinGradleSubplugin.getKaptConfigurationName(sourceSetName)
+
+            project.configurations.findByName(configurationName)?.let { return it }
+            val aptConfiguration = project.configurations.create(configurationName)
+
+            if (aptConfiguration.name != Kapt3KotlinGradleSubplugin.MAIN_KAPT_CONFIGURATION_NAME) {
+                // The main configuration can be created after the current one. We should handle this case
+                val mainConfiguration = findMainKaptConfiguration(project)
+                        ?: createAptConfigurationIfNeeded(project, SourceSet.MAIN_SOURCE_SET_NAME)
+
+                aptConfiguration.extendsFrom(mainConfiguration)
+            }
+
+            return aptConfiguration
+        }
     }
 
     private val kotlinToKaptGenerateStubsTasksMap = mutableMapOf<KotlinCompile, KaptGenerateStubsTask>()
@@ -161,8 +178,6 @@ class Kapt3KotlinGradleSubplugin : KotlinGradleSubplugin<KotlinCompile> {
             javaSourceSet.name
         }
 
-        createAptConfigurationIfNeeded(project, sourceSetName)
-
         val kaptExtension = project.extensions.getByType(KaptExtension::class.java)
 
         val nonEmptyKaptConfigurations = kaptConfigurations.filter { configuration ->
@@ -189,23 +204,6 @@ class Kapt3KotlinGradleSubplugin : KotlinGradleSubplugin<KotlinCompile> {
         return emptyList()
     }
 
-    private fun createAptConfigurationIfNeeded(project: Project, sourceSetName: String): Configuration {
-        val configurationName = Kapt3KotlinGradleSubplugin.getKaptConfigurationName(sourceSetName)
-
-        project.configurations.findByName(configurationName)?.let { return it }
-        val aptConfiguration = project.configurations.create(configurationName)
-
-        if (aptConfiguration.name != Kapt3KotlinGradleSubplugin.MAIN_KAPT_CONFIGURATION_NAME) {
-            // The main configuration can be created after the current one. We should handle this case
-            val mainConfiguration = findMainKaptConfiguration(project)
-                    ?: createAptConfigurationIfNeeded(project, SourceSet.MAIN_SOURCE_SET_NAME)
-
-            aptConfiguration.extendsFrom(mainConfiguration)
-        }
-
-        return aptConfiguration
-    }
-
     override fun getSubpluginKotlinTasks(project: Project, kotlinCompile: KotlinCompile): List<AbstractCompile> {
         val kaptGenerateStubsTask = kotlinToKaptGenerateStubsTasksMap[kotlinCompile]
         return if (kaptGenerateStubsTask == null) emptyList() else listOf(kaptGenerateStubsTask)

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinPlugin.kt

@@ -144,6 +144,7 @@ internal class Kotlin2JvmSourceSetProcessor(
 
     override fun doTargetSpecificProcessing() {
         kotlinSourceSet.kotlin.source(sourceSet.java)
+        Kapt3KotlinGradleSubplugin.createAptConfigurationIfNeeded(project, sourceSet.name)
 
         project.afterEvaluate { project ->
             if (project != null) {
@@ -503,6 +504,7 @@ abstract class AbstractAndroidProjectHandler<V>(private val kotlinConfigurationT
             val kotlinSourceSet = kotlinConfigurationTools.kotlinSourceSetProvider.create(sourceSet.name)
             kotlinSourceSet.kotlin.srcDir(project.file(project.file("src/${sourceSet.name}/kotlin")))
             sourceSet.addConvention(KOTLIN_DSL_NAME, kotlinSourceSet)
+            Kapt3KotlinGradleSubplugin.createAptConfigurationIfNeeded(project, sourceSet.name)
         }
 
         val kotlinOptions = KotlinJvmOptionsImpl()