Move the logic from koltin repo atomicfu gradle plugin to the gradle plugin in the library.

atomicfu-gradle-plugin/build.gradle

@@ -24,10 +24,6 @@ dependencies {
     // Atomicfu compiler plugin dependency will be loaded to kotlinCompilerPluginClasspath
     // Atomicfu plugin will only be applied if the flag is set kotlinx.atomicfu.enableJsIrTransformation=true
     compileOnly "org.jetbrains.kotlin:atomicfu:$kotlin_version"
-    // This runtimeOnly dependency is added as a temporary WA for the problem #384.
-    // The version 1.6.21 was chosen as the lowest valid version of this artifact, 
-    // and it's expected to be resolved to the highest existing version from the user's classpath.
-    runtimeOnly "org.jetbrains.kotlin:atomicfu:1.6.21"
 
     testImplementation gradleTestKit()
     testImplementation 'org.jetbrains.kotlin:kotlin-test'

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

@@ -33,9 +33,9 @@ private const val TEST_IMPLEMENTATION_CONFIGURATION = "testImplementation"
 // If the project uses KGP <= 1.6.20, only JS IR compiler plugin is available, and it is turned on via setting this property.
 // The property is supported for backwards compatibility.
 private const val ENABLE_JS_IR_TRANSFORMATION_LEGACY = "kotlinx.atomicfu.enableIrTransformation"
-private const val ENABLE_JS_IR_TRANSFORMATION = "kotlinx.atomicfu.enableJsIrTransformation"
-private const val ENABLE_JVM_IR_TRANSFORMATION = "kotlinx.atomicfu.enableJvmIrTransformation"
-private const val ENABLE_NATIVE_IR_TRANSFORMATION = "kotlinx.atomicfu.enableNativeIrTransformation"
+internal const val ENABLE_JS_IR_TRANSFORMATION = "kotlinx.atomicfu.enableJsIrTransformation"
+internal const val ENABLE_JVM_IR_TRANSFORMATION = "kotlinx.atomicfu.enableJvmIrTransformation"
+internal const val ENABLE_NATIVE_IR_TRANSFORMATION = "kotlinx.atomicfu.enableNativeIrTransformation"
 private const val MIN_SUPPORTED_GRADLE_VERSION = "7.0"
 private const val MIN_SUPPORTED_KGP_VERSION = "1.7.0"
 
@@ -83,28 +83,18 @@ private fun Project.checkCompatibility() {
 
 private fun Project.applyAtomicfuCompilerPlugin() {
     val kotlinVersion = getKotlinVersion()
-    // for KGP >= 1.7.20:
-    // compiler plugin for JS IR is applied via the property `kotlinx.atomicfu.enableJsIrTransformation`
-    // compiler plugin for JVM IR is applied via the property `kotlinx.atomicfu.enableJvmIrTransformation`
-    if (kotlinVersion.atLeast(1, 7, 20)) {
-        plugins.apply(AtomicfuKotlinGradleSubplugin::class.java)
-        extensions.getByType(AtomicfuKotlinGradleSubplugin.AtomicfuKotlinGradleExtension::class.java).apply {
-            isJsIrTransformationEnabled = rootProject.getBooleanProperty(ENABLE_JS_IR_TRANSFORMATION)
-            isJvmIrTransformationEnabled = rootProject.getBooleanProperty(ENABLE_JVM_IR_TRANSFORMATION)
-            if (kotlinVersion.atLeast(1, 9, 20)) {
-                // Native IR transformation is available since Kotlin 1.9.20
-                isNativeIrTransformationEnabled = rootProject.getBooleanProperty(ENABLE_NATIVE_IR_TRANSFORMATION)   
-            }
-        }
+    if (kotlinVersion.atLeast(1, 9, 0)) {
+        // Since Kotlin 1.9.0 the logic of the Gradle plugin from the Kotlin repo (AtomicfuKotlinGradleSubplugin) 
+        // may be moved to the Gradle plugin in the library. The sources of the compiler plugin 
+        // are published as `kotlin-atomicfu-compiler-plugin-embeddable` since Kotlin 1.9.0 and may be accessed out of the Kotlin repo.
+        plugins.apply(AtomicfuKotlinCompilerPluginInternal::class.java)
     } else {
-        // for KGP >= 1.6.20 && KGP <= 1.7.20:
-        // compiler plugin for JS IR is applied via the property `kotlinx.atomicfu.enableIrTransformation`
-        // compiler plugin for JVM IR is not supported yet
-        if (kotlinVersion.atLeast(1, 6, 20)) {
-            if (rootProject.getBooleanProperty(ENABLE_JS_IR_TRANSFORMATION_LEGACY)) {
-                plugins.apply(AtomicfuKotlinGradleSubplugin::class.java)
-            }
-        }
+        error("You are applying `kotlinx-atomicfu` plugin of version 0.23.3 or newer. " +
+                "However, this version of the plugin is only compatible with Kotlin versions newer than 1.9.0.\n" +
+                "If you wish to use this version of the plugin, please upgrade your Kotlin version to 1.9.0 or newer.\n" +
+                "The alternative solution is to downgrade `kotlinx-atomicfu` plugin version to 0.22.0.\n" +
+                "Please note, that using the latest version of the plugin and upgrading the Kotlin version is a more preferable option.\n\n" +
+                "If you encounter any problems, please submit the issue: https://github.com/Kotlin/kotlinx-atomicfu/")
     }
 }
 
@@ -186,7 +176,7 @@ private fun KotlinVersion.atLeast(major: Int, minor: Int, patch: Int) =
 // kotlinx-atomicfu compiler plugin is available for KGP >= 1.6.20
 private fun Project.isCompilerPluginAvailable() = getKotlinVersion().atLeast(1, 6, 20)
 
-private fun Project.getBooleanProperty(name: String) =
+internal fun Project.getBooleanProperty(name: String) =
     rootProject.findProperty(name)?.toString()?.toBooleanStrict() ?: false
 
 private fun String.toBooleanStrict(): Boolean = when (this) {
@@ -195,15 +185,15 @@ private fun String.toBooleanStrict(): Boolean = when (this) {
     else -> throw IllegalArgumentException("The string doesn't represent a boolean value: $this")
 }
 
-private fun Project.needsJsIrTransformation(target: KotlinTarget): Boolean =
+internal 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 =
+internal fun Project.needsJvmIrTransformation(target: KotlinTarget): Boolean =
     rootProject.getBooleanProperty(ENABLE_JVM_IR_TRANSFORMATION) &&
             (target.platformType == KotlinPlatformType.jvm || target.platformType == KotlinPlatformType.androidJvm)
 
-private fun Project.needsNativeIrTransformation(target: KotlinTarget): Boolean =
+internal fun Project.needsNativeIrTransformation(target: KotlinTarget): Boolean =
     rootProject.getBooleanProperty(ENABLE_NATIVE_IR_TRANSFORMATION) &&
             (target.platformType == KotlinPlatformType.native)
 
@@ -215,7 +205,7 @@ private fun KotlinTarget.isJsIrTarget() =
 private fun Project.isTransitiveAtomicfuDependencyRequired(target: KotlinTarget): Boolean {
     val platformType = target.platformType
     return !config.transformJvm && (platformType == KotlinPlatformType.jvm || platformType == KotlinPlatformType.androidJvm) ||
-            !config.transformJs && platformType == KotlinPlatformType.js ||
+            (!config.transformJs && platformType == KotlinPlatformType.js) ||
             platformType == KotlinPlatformType.wasm ||
             // Always add the transitive atomicfu dependency for native targets, see #379
             platformType == KotlinPlatformType.native

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

@@ -0,0 +1,41 @@
+package kotlinx.atomicfu.plugin.gradle
+
+import org.gradle.api.provider.Provider
+import org.jetbrains.kotlin.gradle.plugin.*
+
+/**
+ * This Gradle plugin applies compiler transformations to the project, it was copied from the kotlin repo (org.jetbrains.kotlinx.atomicfu.gradle.AtomicfuKotlinGradleSubplugin).
+ * 
+ * As the sources of the compiler plugin are published as `org.jetbrains.kotlin.kotlin-atomicfu-compiler-plugin-embeddable` starting from Kotlin 1.9.0,
+ * the Gradle plugin can access this artifact from the library and apply the transformations.
+ * 
+ * NOTE: The version of KGP may differ from the version of Kotlin compiler, and kotlin.native.version may override the version of Kotlin native compiler.
+ * So, the right behavior for the Gradle plugin would be to obtain compiler versions and apply compiler transformations separately to JVM/JS and Native targets.
+ * This was postponed as a separate task (#408).
+ */
+internal class AtomicfuKotlinCompilerPluginInternal : KotlinCompilerPluginSupportPlugin {
+
+    companion object {
+        const val ATOMICFU_ARTIFACT_NAME = "kotlin-atomicfu-compiler-plugin-embeddable"
+    }
+
+
+    override fun isApplicable(kotlinCompilation: KotlinCompilation<*>): Boolean {
+        val target = kotlinCompilation.target
+        val project = target.project
+        return project.needsJvmIrTransformation(target) || project.needsJsIrTransformation(target) || project.needsNativeIrTransformation(target)
+
+    }
+
+    override fun applyToCompilation(
+        kotlinCompilation: KotlinCompilation<*>
+    ): Provider<List<SubpluginOption>> =
+        kotlinCompilation.target.project.provider { emptyList() }
+
+    override fun getCompilerPluginId() = "org.jetbrains.kotlinx.atomicfu"
+
+    // Gets "org.jetbrains.kotlin:kotlin-atomicfu-compiler-plugin-embeddable:{KGP version}"
+    override fun getPluginArtifact(): SubpluginArtifact {
+        return JetBrainsSubpluginArtifact(ATOMICFU_ARTIFACT_NAME)
+    }
+}

integration-testing/examples/mpp-version-catalog/build.gradle.kts

@@ -0,0 +1,13 @@
+import org.jetbrains.kotlin.gradle.dsl.KotlinCompile
+
+plugins {
+    // this is necessary to avoid the plugins to be loaded multiple times
+    // in each subproject's classloader
+    alias(libs.plugins.kotlinMultiplatform) apply false
+}
+
+tasks.withType<KotlinCompile<*>>().configureEach {
+    kotlinOptions {
+        freeCompilerArgs += listOf("-Xskip-prerelease-check")
+    }
+}

integration-testing/examples/mpp-version-catalog/gradle.properties

@@ -0,0 +1 @@
+org.gradle.jvmargs=-Xmx2g -XX:MaxMetaspaceSize=2g

integration-testing/examples/mpp-version-catalog/gradle/libs.versions.toml

@@ -0,0 +1,21 @@
+[versions]
+junit = "4.13.2"
+kotlin = "1.9.21"
+atomicfu = "0.23.2-SNAPSHOT"
+ktor = "2.3.8"
+logback = "1.5.0"
+
+[libraries]
+kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test", version.ref = "kotlin" }
+kotlin-test-junit = { module = "org.jetbrains.kotlin:kotlin-test-junit", version.ref = "kotlin" }
+junit = { group = "junit", name = "junit", version.ref = "junit" }
+logback = { module = "ch.qos.logback:logback-classic", version.ref = "logback" }
+ktor-server-core = { module = "io.ktor:ktor-server-core-jvm", version.ref = "ktor" }
+ktor-server-netty = { module = "io.ktor:ktor-server-netty-jvm", version.ref = "ktor" }
+ktor-server-tests = { module = "io.ktor:ktor-server-tests-jvm", version.ref = "ktor" }
+atomicfuGradlePlugin = { module = "org.jetbrains.kotlinx:atomicfu-gradle-plugin", version.ref = "atomicfu" }
+
+[plugins]
+kotlinJvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+ktor = { id = "io.ktor.plugin", version.ref = "ktor" }
+kotlinMultiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }

integration-testing/examples/mpp-version-catalog/settings.gradle.kts

@@ -0,0 +1,22 @@
+rootProject.name = "mpp-version-catalog"
+enableFeaturePreview("TYPESAFE_PROJECT_ACCESSORS")
+
+pluginManagement {
+    repositories {
+
+        google()
+        gradlePluginPortal()
+        mavenCentral()
+        mavenLocal()
+    }
+}
+
+dependencyResolutionManagement {
+    repositories {
+        google()
+        mavenCentral()
+        mavenLocal()
+    }
+}
+
+include(":shared")

integration-testing/examples/mpp-version-catalog/shared/build.gradle.kts

@@ -0,0 +1,38 @@
+buildscript {
+    dependencies {
+        classpath(libs.atomicfuGradlePlugin)
+    }
+}
+
+repositories {
+    mavenCentral()
+    mavenLocal()
+}
+
+plugins {
+    alias(libs.plugins.kotlinMultiplatform)
+}
+
+apply (plugin = "kotlinx-atomicfu")
+
+kotlin {
+
+    jvm()
+
+    js(IR)
+
+    macosArm64()
+    macosX64()
+    linuxArm64()
+    linuxX64()
+    mingwX64()
+
+    sourceSets {
+        commonMain{
+            dependencies {
+                implementation(kotlin("stdlib"))
+                implementation(kotlin("test-junit"))
+            }
+        }
+    }
+}

integration-testing/examples/mpp-version-catalog/shared/src/commonMain/kotlin/Greeting.kt

@@ -0,0 +1,21 @@
+import kotlinx.atomicfu.*
+import kotlinx.atomicfu.locks.*
+import kotlin.test.*
+
+public class AtomicSampleClass {
+    private val _x = atomic(0)
+    val x get() = _x.value
+
+    public fun doWork(finalValue: Int) {
+        assertEquals(0, x)
+        assertEquals(0, _x.getAndSet(3))
+        assertEquals(3, x)
+        assertTrue(_x.compareAndSet(3, finalValue))
+    }
+
+    private val lock = reentrantLock()
+
+    public fun synchronizedFoo(value: Int): Int {
+        return lock.withLock { value }
+    }
+}

integration-testing/examples/plugin-order-bug/build.gradle

@@ -51,3 +51,11 @@ tasks.withType(KotlinCompile).configureEach {
         freeCompilerArgs += ["-Xskip-prerelease-check"]
     }
 }
+
+// Workaround for https://youtrack.jetbrains.com/issue/KT-58303:
+// the `clean` task can't delete the expanded.lock file on Windows as it's still held by Gradle, failing the build
+tasks.clean {
+    setDelete(layout.buildDirectory.asFileTree.matching {
+        exclude("tmp/.cache/expanded/expanded.lock")
+    })
+}

integration-testing/examples/user-project/build.gradle.kts

@@ -49,3 +49,11 @@ tasks.withType<KotlinCompile<*>>().configureEach {
         freeCompilerArgs += listOf("-Xskip-prerelease-check")
     }
 }
+
+// Workaround for https://youtrack.jetbrains.com/issue/KT-58303:
+// the `clean` task can't delete the expanded.lock file on Windows as it's still held by Gradle, failing the build
+tasks.clean {
+    setDelete(layout.buildDirectory.asFileTree.matching {
+        exclude("tmp/.cache/expanded/expanded.lock")
+    })
+}

integration-testing/src/functionalTest/kotlin/kotlinx.atomicfu.gradle.plugin.test/cases/MppVersionCatalogTest.kt

@@ -0,0 +1,21 @@
+package kotlinx.atomicfu.gradle.plugin.test.cases
+
+import kotlinx.atomicfu.gradle.plugin.test.framework.checker.*
+import kotlinx.atomicfu.gradle.plugin.test.framework.runner.*
+import kotlin.test.*
+
+/**
+ * This test checks the build of mpp-version-catalog project that uses a versions catalog and was a reproducer for this error (#399).
+ */
+class MppVersionCatalogTest {
+    private val mppWithVersionCatalog: GradleBuild = createGradleBuildFromSources("mpp-version-catalog")
+
+    @Test
+    fun testBuildWithKotlinNewerThan_1_9_0() {
+        mppWithVersionCatalog.enableJvmIrTransformation = true
+        mppWithVersionCatalog.enableNativeIrTransformation = true
+        val buildResult = mppWithVersionCatalog.cleanAndBuild()
+        assertTrue(buildResult.isSuccessful, buildResult.output)
+        mppWithVersionCatalog.buildAndCheckBytecode()
+    }
+}

integration-testing/src/functionalTest/kotlin/kotlinx.atomicfu.gradle.plugin.test/cases/PluginOrderBugTest.kt

@@ -1,6 +1,5 @@
 package kotlinx.atomicfu.gradle.plugin.test.cases
 
-import kotlinx.atomicfu.gradle.plugin.test.framework.checker.getProjectClasspath
 import kotlinx.atomicfu.gradle.plugin.test.framework.runner.*
 import kotlinx.atomicfu.gradle.plugin.test.framework.runner.GradleBuild
 import kotlinx.atomicfu.gradle.plugin.test.framework.runner.cleanAndBuild
@@ -19,15 +18,6 @@ class PluginOrderBugTest {
         assertTrue(buildResult.isSuccessful, buildResult.output)
     }
 
-    /**
-     * Ensures that the version of atomicfu compiler plugin in the project's classpath equals the version of KGP used in the project.
-     */
-    @Test
-    fun testResolvedCompilerPluginDependency() {
-        val classpath = pluginOrderBugProject.getProjectClasspath()
-        assertTrue(classpath.contains("org.jetbrains.kotlin:atomicfu:${pluginOrderBugProject.getKotlinVersion()}"))
-    }
-
     /**
      * kotlin-stdlib is an implementation dependency of :atomicfu module, 
      * because compileOnly dependencies are not applicable for Native targets (#376).

integration-testing/src/functionalTest/kotlin/kotlinx.atomicfu.gradle.plugin.test/framework/runner/Environment.kt

@@ -10,6 +10,7 @@ internal const val ENABLE_JVM_IR_TRANSFORMATION = "kotlinx.atomicfu.enableJvmIrT
 internal const val ENABLE_JS_IR_TRANSFORMATION = "kotlinx.atomicfu.enableJsIrTransformation"
 internal const val ENABLE_NATIVE_IR_TRANSFORMATION = "kotlinx.atomicfu.enableNativeIrTransformation"
 internal const val LOCAL_REPOSITORY_URL_PROPERTY = "localRepositoryUrl"
+internal const val KOTLIN_VERSION_PROPERTY = "localRepositoryUrl"
 internal const val DUMMY_VERSION = "DUMMY_VERSION"
 internal const val LOCAL_REPO_DIR_PREFIX = "build/.m2/"