Do not rename original destination directory of the compile task. (#312)

For targets that require IR transformation modification of compilation tasks output directories is not required. Classes from the original directories are transformed by the compiler plugin in place.

Fixes #311

Author: mvicsokolova

atomicfu-gradle-plugin/src/main/kotlin/kotlinx/atomicfu/plugin/gradle/AtomicFUGradlePlugin.kt

@@ -159,6 +159,10 @@ private fun Project.needsJsIrTransformation(target: KotlinTarget): Boolean =
     (rootProject.getBooleanProperty(ENABLE_JS_IR_TRANSFORMATION) || rootProject.getBooleanProperty(ENABLE_JS_IR_TRANSFORMATION_LEGACY))
             && target.isJsIrTarget()
 
+private fun Project.needsJvmIrTransformation(target: KotlinTarget): Boolean =
+    rootProject.getBooleanProperty(ENABLE_JVM_IR_TRANSFORMATION) &&
+            (target.platformType == KotlinPlatformType.jvm || target.platformType == KotlinPlatformType.androidJvm)
+
 private fun KotlinTarget.isJsIrTarget() = (this is KotlinJsTarget && this.irTarget != null) || this is KotlinJsIrTarget
 
 private fun Project.addCompilerPluginDependency() {
@@ -263,6 +267,8 @@ private fun Project.configureTransformationForTarget(target: KotlinTarget) {
     val originalDirsByCompilation = hashMapOf<KotlinCompilation<*>, FileCollection>()
     val config = config
     target.compilations.all compilations@{ compilation ->
+        // do not modify directories if compiler plugin is applied
+        if (needsJvmIrTransformation(target) || needsJsIrTransformation(target)) return@compilations
         val compilationType = compilation.name.compilationNameToType()
             ?: return@compilations // skip unknown compilations
         val classesDirs = compilation.output.classesDirs

atomicfu-gradle-plugin/src/test/kotlin/kotlinx/atomicfu/plugin/gradle/test/JvmProjectTest.kt

@@ -103,6 +103,6 @@ class JvmIrTransformationTest : BaseKotlinGradleTest("jvm-simple") {
     @Test
     fun testAtomicfuReferences() {
         runner.build()
-        checkBytecode("build/classes/atomicfu-orig/main/IntArithmetic.class")
+        checkBytecode("build/classes/kotlin/main/IntArithmetic.class")
     }
 }

atomicfu-gradle-plugin/src/test/kotlin/kotlinx/atomicfu/plugin/gradle/test/MppProjectTest.kt

@@ -112,7 +112,7 @@ class MppJvmIrTransformationTest : BaseKotlinGradleTest("mpp-simple") {
     @Test
     fun testAtomicfuReferences() {
         runner.build()
-        checkBytecode("build/classes/atomicfu-orig/jvm/main/IntArithmetic.class")
+        checkBytecode("build/classes/kotlin/jvm/main/IntArithmetic.class")
     }
 }
 
@@ -217,6 +217,6 @@ class MppBothIrTransformationTest : BaseKotlinGradleTest("mpp-simple") {
     @Test
     fun testAtomicfuReferences() {
         runner.build()
-        checkBytecode("build/classes/atomicfu-orig/jvm/main/IntArithmetic.class")
+        checkBytecode("build/classes/kotlin/jvm/main/IntArithmetic.class")
     }
 }