KMA-413 Publish AC KMM's backend.native dependency with Kotlin-for-IDE

AppCode KMM uses parts of `backend.native` for its Kotlin-ObjC
cross-resolve. Thus, this IDE dependency needs to be kept up-to-date
with the other Kotlin compiler for IDE artifacts. This commit integrates
a stripped down version into the existing `ide-plugin-dependencies`
build infrastructure to make it easier to keep them in sync.

Implementation details:
* Proguard-based removal of code irrelevant for IDE for smaller jar size
* Publication of non-stripped-down sources for better IDE experience

build.gradle.kts

@@ -274,7 +274,7 @@ extra["compilerModulesForJps"] = listOf(
     ":compiler:compiler.version"
 )
 
-extra["compilerArtifactsForIde"] = listOf(
+extra["compilerArtifactsForIde"] = listOfNotNull(
     ":prepare:ide-plugin-dependencies:android-extensions-compiler-plugin-for-ide",
     ":prepare:ide-plugin-dependencies:allopen-compiler-plugin-for-ide",
     ":prepare:ide-plugin-dependencies:incremental-compilation-impl-tests-for-ide",
@@ -292,6 +292,7 @@ extra["compilerArtifactsForIde"] = listOf(
     ":prepare:ide-plugin-dependencies:compiler-components-for-jps",
     ":prepare:ide-plugin-dependencies:parcelize-compiler-plugin-for-ide",
     ":prepare:ide-plugin-dependencies:lombok-compiler-plugin-for-ide",
+    ":prepare:ide-plugin-dependencies:kotlin-backend-native-for-ide".takeIf { kotlinBuildProperties.isKotlinNativeEnabled },
     ":prepare:ide-plugin-dependencies:kotlin-compiler-tests-for-ide",
     ":prepare:ide-plugin-dependencies:kotlin-compiler-testdata-for-ide",
     ":prepare:ide-plugin-dependencies:kotlin-stdlib-minimal-for-test-for-ide",

prepare/ide-plugin-dependencies/kotlin-backend-native-for-ide/backend-native-for-ide.pro

@@ -0,0 +1,17 @@
+-target 11
+-dontoptimize
+-dontobfuscate
+
+-keepdirectories META-INF/**
+
+-dontnote **
+-dontwarn llvm.**
+-dontwarn kotlin.reflect.full.KClasses
+
+-keep public class !org.jetbrains.kotlin.backend.konan.objcexport.ObjCExport,org.jetbrains.kotlin.backend.konan.objcexport.** { public *; }
+-keep public class org.jetbrains.kotlin.backend.konan.ObjCInteropKt { public *; }
+-keep public class org.jetbrains.kotlin.backend.konan.ObjCOverridabilityCondition { public *; }
+-keep public class org.jetbrains.kotlin.cli.bc.K2NativeCompilerArguments* { public *; }
+-keep public class org.jetbrains.kotlin.cli.bc.K2NativeKt { public ** parse*; }
+-keep public class org.jetbrains.kotlin.cli.bc.BinaryOptionWithValue { public *; }
+-keep public class org.jetbrains.kotlin.backend.konan.BinaryOptions { public *; }

prepare/ide-plugin-dependencies/kotlin-backend-native-for-ide/build.gradle.kts

@@ -0,0 +1,102 @@
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+
+plugins {
+    kotlin("jvm")
+}
+
+idePluginDependency {
+    if (!kotlinBuildProperties.isKotlinNativeEnabled) return@idePluginDependency
+
+    description = "Stripped down variant of Kotlin Backend Native for IDE (AppCode KMM)"
+    val jarBaseName = property("archivesBaseName") as String
+
+    val proguardLibraryJars by configurations.creating {
+        attributes {
+            attribute(Usage.USAGE_ATTRIBUTE, objects.named(Usage.JAVA_API))
+        }
+    }
+    val embedded by configurations
+
+    dependencies {
+        embedded(project(":kotlin-native:backend.native")) { isTransitive = false }
+
+        proguardLibraryJars(project(":kotlin-native:backend.native", "kotlin_stdlib_jar"))
+        proguardLibraryJars(project(":kotlin-native:backend.native", "kotlin_reflect_jar"))
+        proguardLibraryJars(project(":kotlin-native:backend.native", "cli_bcApiElements"))
+    }
+
+    noDefaultJar()
+
+    val shadowJar by task<ShadowJar> {
+        configurations = listOf(embedded)
+        duplicatesStrategy = DuplicatesStrategy.FAIL
+        destinationDirectory.set(File(buildDir, "libs"))
+        archiveClassifier.set("shadow")
+    }
+
+    val proguard by task<CacheableProguardTask> {
+        dependsOn(shadowJar)
+
+        configuration(fileFrom(projectDir, "backend-native-for-ide.pro"))
+        injars(mapOf("filter" to "!META-INF/versions/**"), shadowJar.get().outputs.files)
+        outjars(fileFrom(buildDir, "libs", "$jarBaseName-$version-after-proguard.jar"))
+
+        javaLauncher.set(project.getToolchainLauncherFor(JdkMajorVersion.JDK_1_8))
+
+        libraryjars(mapOf("filter" to "!META-INF/versions/**"), proguardLibraryJars)
+        libraryjars(
+            files(
+                javaLauncher.map {
+                    firstFromJavaHomeThatExists(
+                        "jre/lib/rt.jar",
+                        "../Classes/classes.jar",
+                        jdkHome = it.metadata.installationPath.asFile
+                    )
+                },
+                javaLauncher.map {
+                    firstFromJavaHomeThatExists(
+                        "jre/lib/jsse.jar",
+                        "../Classes/jsse.jar",
+                        jdkHome = it.metadata.installationPath.asFile
+                    )
+                },
+                javaLauncher.map {
+                    org.gradle.internal.jvm.Jvm.forHome(it.metadata.installationPath.asFile).toolsJar
+                }
+            )
+        )
+    }
+
+    val resultJar by task<Jar> {
+        dependsOn(proguard)
+        manifest.attributes.apply {
+            put("Implementation-Vendor", "JetBrains")
+            put("Implementation-Title", jarBaseName)
+            put("Implementation-Version", version)
+        }
+        from {
+            zipTree(proguard.get().singleOutputFile())
+        }
+    }
+
+    addArtifact("runtime", resultJar)
+    addArtifact("runtimeElements", resultJar)
+    addArtifact("archives", resultJar)
+
+    publish()
+
+    // includes more sources than left by proguard
+    org.gradle.api.plugins.internal.JvmPluginsHelper.configureDocumentationVariantWithArtifact(
+        JavaPlugin.SOURCES_ELEMENTS_CONFIGURATION_NAME,
+        null,
+        DocsType.SOURCES,
+        listOf(),
+        "sourcesJar",
+        project(":kotlin-native:backend.native").sourceSets["cli_bc"].allSource +
+                project(":kotlin-native:backend.native").sourceSets["compiler"].allSource,
+        components["kotlinLibrary"] as AdhocComponentWithVariants,
+        configurations,
+        tasks,
+        objects
+    )
+}

settings.gradle

@@ -358,6 +358,7 @@ if (!buildProperties.inJpsBuildIdeaSync) {
             ":prepare:ide-plugin-dependencies:sam-with-receiver-compiler-plugin-for-ide",
             ":prepare:ide-plugin-dependencies:parcelize-compiler-plugin-for-ide",
             ":prepare:ide-plugin-dependencies:lombok-compiler-plugin-for-ide",
+            ":prepare:ide-plugin-dependencies:kotlin-backend-native-for-ide",
             ":prepare:ide-plugin-dependencies:tests-common-tests-for-ide",
             ":prepare:ide-plugin-dependencies:compiler-components-for-jps",
             ":prepare:ide-plugin-dependencies:kotlin-compiler-testdata-for-ide",