Restructure compiler-plugin module into: backend, k2, common and cli (#149)

Author: Mr3zee

compiler-plugin/build.gradle.kts

@@ -2,12 +2,10 @@
  * Copyright 2023-2024 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
  */
 
-import org.jetbrains.kotlin.gradle.dsl.ExplicitApiMode
 import util.configureMetaTasks
 
 plugins {
-    alias(libs.plugins.conventions.jvm)
-    alias(libs.plugins.compiler.specific.module)
+    alias(libs.plugins.conventions.utils)
 }
 
 val kotlinVersion: String by extra
@@ -18,15 +16,5 @@ allprojects {
     version = "$kotlinVersion-$rpcVersion"
 }
 
-kotlin {
-    explicitApi = ExplicitApiMode.Disabled
-}
-
-dependencies {
-    compileOnly(libs.kotlin.compiler.embeddable)
-    implementation(projects.compilerPluginK2)
-    implementation(projects.compilerPluginCommon)
-}
-
 configureMetaTasks("cleanTest", "test")
 configureMetaTasks(tasks.matching { it.name.startsWith("publish") }.map { it.name })

compiler-plugin/compiler-plugin-backend/build.gradle.kts

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2023-2024 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+import org.jetbrains.kotlin.gradle.dsl.ExplicitApiMode
+
+plugins {
+    alias(libs.plugins.conventions.jvm)
+    alias(libs.plugins.compiler.specific.module)
+}
+
+kotlin {
+    explicitApi = ExplicitApiMode.Disabled
+}
+
+dependencies {
+    compileOnly(libs.kotlin.compiler.embeddable)
+    implementation(projects.compilerPluginCommon)
+}

compiler-plugin/src/main/core/kotlinx/rpc/codegen/RPCCompilerPluginCore.kt renamed to compiler-plugin/compiler-plugin-backend/src/main/core/kotlinx/rpc/codegen/RPCIrPlugin.kt

@@ -10,7 +10,7 @@ import org.jetbrains.kotlin.cli.common.CLIConfigurationKeys
 import org.jetbrains.kotlin.cli.common.messages.MessageCollector
 import org.jetbrains.kotlin.config.CompilerConfiguration
 
-object RPCCompilerPluginCore {
+object RPCIrPlugin {
     fun provideExtension(configuration: CompilerConfiguration): IrGenerationExtension {
         val logger = configuration.get(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY, MessageCollector.NONE)
         val versionSpecificApi = VersionSpecificApi.INSTANCE