Revert "Fix source set resources filtering broken by refactoring"

This reverts commit 6af6834

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

@@ -308,41 +308,6 @@ class NewMultiplatformIT : BaseGradleIT() {
         }
     }
 
-    @Test
-    fun testResourceFilteringAndSourceTrackingWithJava() = with(Project("simpleProject")) {
-        setupWorkingDir()
-        gradleBuildScript().appendText(
-            "\n" + """
-            // Test 1 -- check that Kotlin sources are correctly filtered out of resources, even those added late at configuration time:
-            sourceSets.main.resources.srcDir('src/main/kotlin')
-            sourceSets.main.resources.srcDir('src/foo/kotlin')
-            kotlin.target.compilations.main.source(kotlin.sourceSets.create('foo'))
-
-            // Test 2 -- check that Java sources from the Kotlin source directories are correctly tracked under `allJava` in the source set:
-            sourceSets.main.allJava.files.each { println "allJava:${'$'}{it.name}" }
-            """.trimIndent()
-        )
-        listOf("src/foo/kotlin/foo.kt", "src/main/resources/foo.txt", "src/foo/kotlin/foo.java").forEach { path ->
-            projectDir.resolve(path).apply { parentFile.mkdirs(); writeText("foo") }
-        }
-
-        build("processResources") {
-            assertSuccessful()
-
-            // Test 1 (see above)
-            assertTasksExecuted(":processResources")
-            assertFileExists("build/resources/main/foo.txt")
-            assertNoSuchFile("build/resources/main/helloWorld.kt")
-            assertNoSuchFile("build/resources/main/foo.kt")
-
-            // Test 2 (see above)
-            assertContains("allJava:Greeter.java")
-            assertContains("allJava:HelloWorld.java")
-            assertContains("allJava:foo.java")
-        }
-    }
-
-
     @Test
     fun testResolveMppLibDependencyToMetadata() {
         val libProject = Project("sample-lib", gradleVersion, "new-mpp-lib-and-app")

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

@@ -37,6 +37,7 @@ import org.jetbrains.kotlin.gradle.tasks.*
 import org.jetbrains.kotlin.gradle.utils.*
 import java.io.File
 import java.net.URL
+import java.util.*
 import java.util.concurrent.Callable
 import java.util.jar.Manifest
 
@@ -115,20 +116,15 @@ internal abstract class KotlinJavaSourceSetProcessor<T : AbstractKotlinCompile<*
         if (javaSourceSet == null)
             return
 
-        val kotlinDirSets = kotlinCompilation.kotlinSourceSets
+        val kotlinDirSets = kotlinCompilation.kotlinSourceSets.map(KotlinSourceSet::kotlin)
 
-        // run lazily to support changing kotlinSourceSets after plugin is applied
-        val kotlinSrcDirsToAdd = Callable {
-            // Try to avoid duplicate Java sources in allSource:
-            kotlinDirSets.map { filterOutJavaSrcDirsIfPossible(it.kotlin) }
-        }
+        // Try to avoid duplicate Java sources in allSource:
+        val kotlinSrcDirsToAdd = kotlinDirSets.map { filterOutJavaSrcDirsIfPossible(it) }
 
-        javaSourceSet.allJava.srcDirs(kotlinSrcDirsToAdd)
-        javaSourceSet.allSource.srcDirs(kotlinSrcDirsToAdd)
-
-        javaSourceSet.resources.filter.exclude { fileTreeElement ->
-            val file = fileTreeElement.file
-            kotlinDirSets.any { file in it.kotlin }
+        kotlinSrcDirsToAdd.forEach { kotlinSrcDirs ->
+            javaSourceSet.allJava.srcDirs(kotlinSrcDirs)
+            javaSourceSet.allSource.srcDirs(kotlinSrcDirs)
+            javaSourceSet.resources.filter.exclude { it.file in kotlinSrcDirs }
         }
     }