Gradle plugin: do not store generated folder for android into sourceSets, because they are reused for different buildTypes and flavors

#KT-8202 Fixed #KT-9715 Fixed

libraries/tools/kotlin-gradle-plugin-core/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt

@@ -10,8 +10,8 @@ import org.gradle.api.GradleException
 import org.gradle.api.file.SourceDirectorySet
 import org.gradle.api.logging.Logger
 import org.gradle.api.logging.Logging
+import org.gradle.api.plugins.ExtraPropertiesExtension
 import org.gradle.api.tasks.SourceTask
-import java.util.HashSet
 import org.gradle.api.tasks.TaskAction
 import org.gradle.api.tasks.compile.AbstractCompile
 import org.jetbrains.kotlin.cli.common.CLICompiler
@@ -26,13 +26,8 @@ import org.jetbrains.kotlin.cli.js.K2JSCompiler
 import org.jetbrains.kotlin.cli.jvm.K2JVMCompiler
 import org.jetbrains.kotlin.config.Services
 import org.jetbrains.kotlin.utils.LibraryUtils
-import org.gradle.api.file.FileCollection
-import org.gradle.api.plugins.ExtraPropertiesExtension
-import org.gradle.api.tasks.compile.JavaCompile
-import org.jetbrains.org.objectweb.asm.ClassWriter
-import java.io.IOException
-import java.lang.ref.WeakReference
 import java.io.File
+import java.util.*
 
 val DEFAULT_ANNOTATIONS = "org.jebrains.kotlin.gradle.defaultAnnotations"
 
@@ -102,7 +97,8 @@ public open class KotlinCompile() : AbstractKotlinCompile<K2JVMCompilerArguments
     override val compiler = K2JVMCompiler()
     override fun createBlankArgs(): K2JVMCompilerArguments = K2JVMCompilerArguments()
 
-    val srcDirsSources = HashSet<SourceDirectorySet>()
+    // Should be SourceDirectorySet or File
+    val srcDirsSources = HashSet<Any>()
 
     override fun populateTargetSpecificArgs(args: K2JVMCompilerArguments) {
         // show kotlin compiler where to look for java source files
@@ -178,30 +174,43 @@ public open class KotlinCompile() : AbstractKotlinCompile<K2JVMCompilerArguments
         }
     }
 
-    // override setSource to track source directory sets
+    // override setSource to track source directory sets and files (for generated android folders)
     override fun setSource(source: Any?) {
         srcDirsSources.clear()
         if (source is SourceDirectorySet) {
             srcDirsSources.add(source)
         }
+        else if (source is File) {
+            srcDirsSources.add(source)
+        }
         super.setSource(source)
     }
 
-    // override source to track source directory sets
+    // override source to track source directory sets and files (for generated android folders)
     override fun source(vararg sources: Any?): SourceTask? {
         for (source in sources) {
             if (source is SourceDirectorySet) {
                 srcDirsSources.add(source)
             }
+            else if (source is File) {
+                srcDirsSources.add(source)
+            }
         }
         return super.source(sources)
     }
 
     fun findSrcDirRoot(file: File): File? {
         for (source in srcDirsSources) {
-            for (root in source.getSrcDirs()) {
+            if (source is SourceDirectorySet) {
-                if (FileUtil.isAncestor(root, file, false)) {
+                for (root in source.getSrcDirs()) {
-                    return root
+                    if (FileUtil.isAncestor(root, file, false)) {
+                        return root
+                    }
+                }
+            }
+            else if (source is File) {
+                if (FileUtil.isAncestor(source, file, false)) {
+                    return source
                 }
             }
         }

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

@@ -374,18 +374,6 @@ open class KotlinAndroidPlugin @Inject constructor(val scriptHandler: ScriptHand
                 }
             }
 
-            fun configureDefaultSourceSet() {
-                val defaultSourceSet = variantData.getVariantConfiguration().getDefaultSourceSet()
-                val kotlinSourceDirectorySet = getExtension<KotlinSourceSet>(defaultSourceSet, "kotlin").getKotlin()
-                // getJavaSources should return the Java sources used for compilation
-                // We want to collect only generated files, like R-class output dir
-                // Actual java sources will be collected later
-                val additionalSourceFiles = variantData.getJavaSources().filterIsInstance(javaClass<File>())
-                kotlinSourceDirectorySet.addSourceDirectories(additionalSourceFiles)
-            }
-
-            configureDefaultSourceSet()
-
             val aptFiles = arrayListOf<File>()
 
             // getSortedSourceProviders should return only actual java sources, generated sources should be collected earlier
@@ -405,6 +393,15 @@ open class KotlinAndroidPlugin @Inject constructor(val scriptHandler: ScriptHand
                 }
             }
 
+            // getJavaSources should return the Java sources used for compilation
+            // We want to collect only generated files, like R-class output dir
+            // Actual java sources will be collected later
+            val additionalSourceFiles = variantData.getJavaSources().filterIsInstance(javaClass<File>())
+            for (file in additionalSourceFiles) {
+                kotlinTask.source(file)
+                logger.kotlinDebug("Source directory with generated files ${file.getAbsolutePath()} was added to kotlin source for $kotlinTaskName")
+            }
+
             subpluginEnvironment.addSubpluginArguments(project, kotlinTask)
 
             kotlinTask doFirst {