kotlinx.atomicfu compiler plugin for JS_IR backend (#4581)

* kotlinx.atomicfu compiler plugin for JS_IR

Support transformations of atomic operations introduced by the kotlinx.atomicfu library for the JS_IR backend. Compiler plugin is applied externally by the kotlinx.atomicfu gradle plugin.

* Apply compiler plugin for JS platform only

* New plugin test structure

* testGroupOutputDirPrefix changed

libraries/tools/atomicfu/src/main/kotlin/org/jetbrains/kotlinx/atomicfu/gradle/AtomicfuKotlinGradleSubplugin.kt

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlinx.atomicfu.gradle
+
+import org.gradle.api.Project
+import org.gradle.api.provider.Provider
+import org.gradle.api.tasks.compile.AbstractCompile
+import org.jetbrains.kotlin.gradle.plugin.*
+
+class AtomicfuKotlinGradleSubplugin :
+    KotlinCompilerPluginSupportPlugin,
+    @Suppress("DEPRECATION_ERROR") // implementing to fix KT-39809
+    KotlinGradleSubplugin<AbstractCompile> {
+    companion object {
+        const val ATOMICFU_ARTIFACT_NAME = "atomicfu"
+    }
+
+    override fun isApplicable(kotlinCompilation: KotlinCompilation<*>): Boolean = true
+
+    override fun applyToCompilation(
+        kotlinCompilation: KotlinCompilation<*>
+    ): Provider<List<SubpluginOption>> =
+        kotlinCompilation.target.project.provider { emptyList<SubpluginOption>() }
+
+    override fun getPluginArtifact(): SubpluginArtifact =
+        JetBrainsSubpluginArtifact(ATOMICFU_ARTIFACT_NAME)
+
+    override fun getCompilerPluginId() = "org.jetbrains.kotlinx.atomicfu"
+
+    //region Stub implementation for legacy API, KT-39809
+    override fun isApplicable(project: Project, task: AbstractCompile): Boolean = true
+
+    override fun apply(
+        project: Project,
+        kotlinCompile: AbstractCompile,
+        javaCompile: AbstractCompile?,
+        variantData: Any?,
+        androidProjectHandler: Any?,
+        kotlinCompilation: KotlinCompilation<*>?
+    ): List<SubpluginOption> {
+        return emptyList()
+    }
+    //endregion
+}

libraries/tools/atomicfu/src/main/resources/META-INF/gradle-plugins/kotlinx-atomicfu.properties

@@ -0,0 +1 @@
+implementation-class=org.jetbrains.kotlinx.atomicfu.gradle.AtomicfuKotlinGradleSubplugin

libraries/tools/atomicfu/src/main/resources/META-INF/gradle-plugins/org.jetbrains.kotlin.plugin.atomicfu.properties

@@ -0,0 +1 @@
+implementation-class=org.jetbrains.kotlinx.atomicfu.gradle.AtomicfuKotlinGradleSubplugin

libraries/tools/atomicfu/src/main/resources/META-INF/services/org.jetbrains.kotlin.gradle.plugin.KotlinGradleSubplugin

@@ -0,0 +1,17 @@
+#
+# Copyright 2010-2020 JetBrains s.r.o.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+org.jetbrains.kotlinx.atomicfu.gradle.AtomicfuKotlinGradleSubplugin