JVM Compilation

/**
 * Kotlin to JVM bytecode compiler implementation
 * Supports K2 (new) compiler pipeline with enhanced performance and analysis
 */
class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
    override val platform: TargetPlatform // JvmPlatforms.defaultJvmPlatform
    
    override fun createArguments(): K2JVMCompilerArguments
    
    override fun doExecute(
        arguments: K2JVMCompilerArguments,
        configuration: CompilerConfiguration,
        rootDisposable: Disposable,
        paths: KotlinPaths?
    ): ExitCode
    
    override fun doExecutePhased(
        arguments: K2JVMCompilerArguments,
        services: Services,
        messageCollector: MessageCollector
    ): ExitCode
}

/**
 * Arguments specific to JVM compilation
 * Extends CommonCompilerArguments with JVM-specific options
 */
class K2JVMCompilerArguments : CommonCompilerArguments() {
    /** Output directory for compiled .class files */
    var destination: String?
    
    /** Output JAR file path */
    var jar: String?
    
    /** Classpath for compilation (directories and JAR files) */
    var classpath: String?
    
    /** Include Kotlin runtime in the resulting JAR */
    var includeRuntime: Boolean
    
    /** Path to JDK home directory */
    var jdkHome: String?
    
    /** Target JVM version (1.8, 9, 10, 11, 15, 17, 18, 19, 20, 21) */
    var jvmTarget: String?
    
    /** Module name for the compilation */
    var moduleName: String?
    
    /** Disable standard script definitions */
    var disableStandardScript: Boolean
    
    /** Enable script mode compilation */
    var script: Boolean
    
    /** Compile and execute script expression */
    var expression: String?
    
    /** Enable REPL mode */
    var repl: Boolean
    
    /** Build file for module compilation */
    var buildFile: String?
    
    /** Java module path */
    var javaModulePath: String?
    
    /** Add modules to compile */
    var addModules: String?
    
    /** No JDK class path roots */
    var noJdk: Boolean
    
    /** No standard library */
    var noStdlib: Boolean
    
    /** No reflection */
    var noReflect: Boolean
    
    /** Emit JVM debug information */
    var jvmDebug: Boolean
    
    /** Use old class file format with JVM target */
    var useOldClassFiles: Boolean
}

object JVMConfigurationKeys {
    /** Output directory for .class files */
    val OUTPUT_DIRECTORY: CompilerConfigurationKey<File>
    
    /** Output JAR file */
    val OUTPUT_JAR: CompilerConfigurationKey<File>
    
    /** Classpath entries (directories and JARs) */
    val CLASSPATH_ROOTS: CompilerConfigurationKey<List<File>>
    
    /** Include Kotlin runtime in output */
    val INCLUDE_RUNTIME: CompilerConfigurationKey<Boolean>
    
    /** JDK home directory */
    val JDK_HOME: CompilerConfigurationKey<File>
    
    /** JVM target version */
    val JVM_TARGET: CompilerConfigurationKey<JvmTarget>
    
    /** Disable standard script definition */
    val DISABLE_STANDARD_SCRIPT_DEFINITION: CompilerConfigurationKey<Boolean>
    
    /** Retain output in memory */
    val RETAIN_OUTPUT_IN_MEMORY: CompilerConfigurationKey<Boolean>
    
    /** Disable optimization */
    val DISABLE_OPTIMIZATION: CompilerConfigurationKey<Boolean>
}

enum class JvmTarget(
    val majorVersion: Int,
    val description: String
) {
    JVM_1_8(52, "1.8"),
    JVM_9(53, "9"), 
    JVM_10(54, "10"),
    JVM_11(55, "11"),
    JVM_15(59, "15"),
    JVM_17(61, "17"),
    JVM_18(62, "18"),
    JVM_19(63, "19"),
    JVM_20(64, "20"),
    JVM_21(65, "21");
    
    companion object {
        val DEFAULT: JvmTarget
        fun fromString(string: String): JvmTarget?
    }
}

/**
 * Main bytecode compilation entry point
 * Handles the complete pipeline from resolved program to bytecode
 */
object KotlinToJVMBytecodeCompiler {
    /**
     * Compile Kotlin sources to JVM bytecode
     * 
     * @param environment Kotlin compilation environment
     * @param configuration Compiler configuration
     * @param chunk Module chunk to compile
     * @return Compilation result with generated files
     */
    fun compileModules(
        environment: KotlinCoreEnvironment,
        configuration: CompilerConfiguration,
        chunk: ModuleChunk
    ): Boolean
    
    /**
     * Generate class files from analysis result
     * 
     * @param environment Compilation environment
     * @param analysisResult Frontend analysis result
     * @param files Source files to compile
     * @return Success status
     */
    fun generateClassFiles(
        environment: KotlinCoreEnvironment,
        analysisResult: AnalysisResult,
        files: Collection<KtFile>
    ): Boolean
}

import org.jetbrains.kotlin.cli.jvm.K2JVMCompiler
import org.jetbrains.kotlin.cli.common.arguments.K2JVMCompilerArguments
import org.jetbrains.kotlin.cli.common.ExitCode

// Configure compilation arguments
val args = K2JVMCompilerArguments().apply {
    // Source files to compile
    freeArgs = listOf(
        "src/main/kotlin/Main.kt",
        "src/main/kotlin/Utils.kt"
    )
    
    // Output directory
    destination = "build/classes/kotlin/main"
    
    // Classpath including dependencies
    classpath = listOf(
        "lib/kotlin-stdlib-1.9.0.jar",
        "lib/my-dependency.jar"
    ).joinToString(File.pathSeparator)
    
    // JVM target version
    jvmTarget = "11"
    
    // Module name
    moduleName = "my-app"
}

// Create and execute compiler
val compiler = K2JVMCompiler()
val exitCode = compiler.exec(System.err, Services.EMPTY, args)

when (exitCode) {
    ExitCode.OK -> println("Compilation successful")
    ExitCode.COMPILATION_ERROR -> println("Compilation failed")
    else -> println("Internal error: $exitCode")
}

val args = K2JVMCompilerArguments().apply {
    freeArgs = listOf("src/")
    jar = "build/libs/my-app.jar"
    includeRuntime = true
    jvmTarget = "1.8"
    
    // Include manifest
    manifestMain = "com.example.MainKt"
}

val compiler = K2JVMCompiler()
val result = compiler.exec(System.err, Services.EMPTY, args)

val args = K2JVMCompilerArguments().apply {
    script = true
    freeArgs = listOf("script.kts")
    classpath = "lib/kotlin-stdlib.jar"
}

val compiler = K2JVMCompiler()
compiler.exec(System.err, Services.EMPTY, args)

import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
import org.jetbrains.kotlin.config.CompilerConfiguration
import org.jetbrains.kotlin.config.JVMConfigurationKeys
import org.jetbrains.kotlin.config.CommonConfigurationKeys
import java.io.File

// Create configuration
val configuration = CompilerConfiguration().apply {
    put(JVMConfigurationKeys.OUTPUT_DIRECTORY, File("build/classes"))
    put(JVMConfigurationKeys.JVM_TARGET, JvmTarget.JVM_11)
    put(CommonConfigurationKeys.MODULE_NAME, "my-module")
    put(JVMConfigurationKeys.CLASSPATH_ROOTS, listOf(
        File("lib/kotlin-stdlib.jar"),
        File("lib/dependencies.jar")
    ))
}

// Create environment and compile
val environment = KotlinCoreEnvironment.createForProduction(
    parentDisposable = Disposer.newDisposable(),
    configuration = configuration,
    configFiles = EnvironmentConfigFiles.JVM_CONFIG_FILES
)

val success = KotlinToJVMBytecodeCompiler.compileModules(
    environment = environment,
    configuration = configuration,
    chunk = ModuleChunk(listOf(module))
)

class CompilationException(message: String, cause: Throwable? = null) : RuntimeException(message, cause)

class CompileEnvironmentException(message: String) : Exception(message)