[JS SCRIPT] refactor js script infrastructure

- Implement proper script compiler proxy to correctly handle script and its closed-world dependencies
 - Clean up zoo of JsScriptCompilers

libraries/scripting/js/build.gradle.kts

@@ -7,9 +7,9 @@ jvmTarget = "1.6"
 
 dependencies {
     compile(project(":kotlin-scripting-common"))
-    compile(project(":compiler:cli-common"))
-    compile(project(":js:js.engines"))
-    compile(intellijCoreDep()) { includeJars("intellij-core") }
+    compileOnly(project(":compiler:backend.js"))
+    compileOnly(project(":compiler:cli-common"))
+    compileOnly(project(":js:js.engines"))
 }
 
 sourceSets {

libraries/scripting/js/src/org/jetbrains/kotlin/scripting/repl/js/JsReplEvaluator.kt

@@ -11,9 +11,7 @@ import java.util.concurrent.locks.ReentrantReadWriteLock
 
 class JsReplEvaluator : ReplEvaluator {
     //TODO: support println()
-    private val engine = ScriptEngineNashorn()
-
-    override fun createState(lock: ReentrantReadWriteLock): IReplStageState<*> = JsState(lock)
+    override fun createState(lock: ReentrantReadWriteLock): IReplStageState<*> = JsEvaluationState(lock, ScriptEngineNashorn())
 
     override fun eval(
         state: IReplStageState<*>,
@@ -22,7 +20,8 @@ class JsReplEvaluator : ReplEvaluator {
         invokeWrapper: InvokeWrapper?
     ): ReplEvalResult {
         return try {
-            val evalResult = engine.eval<Any?>(compileResult.data as String)
+            val evaluationState = state.asState(JsEvaluationState::class.java)
+            val evalResult = evaluationState.engine.eval<Any?>(compileResult.data as String)
             ReplEvalResult.ValueResult("result", evalResult, "Any?")
         } catch (e: Exception) {
             ReplEvalResult.Error.Runtime("Error while evaluating", e)

libraries/scripting/js/src/org/jetbrains/kotlin/scripting/repl/js/JsReplUtils.kt

@@ -6,7 +6,10 @@
 package org.jetbrains.kotlin.scripting.repl.js
 
 import org.jetbrains.kotlin.cli.common.repl.*
+import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.descriptors.ScriptDescriptor
+import org.jetbrains.kotlin.ir.backend.js.utils.NameTables
+import org.jetbrains.kotlin.js.engine.ScriptEngine
 import java.util.concurrent.locks.ReentrantReadWriteLock
 import kotlin.reflect.KClass
 import kotlin.script.experimental.api.CompiledScript
@@ -14,7 +17,7 @@ import kotlin.script.experimental.api.ResultWithDiagnostics
 import kotlin.script.experimental.api.ScriptCompilationConfiguration
 import kotlin.script.experimental.api.ScriptEvaluationConfiguration
 
-class JsState(override val lock: ReentrantReadWriteLock) : IReplStageState<ScriptDescriptor> {
+abstract class JsState(override val lock: ReentrantReadWriteLock) : IReplStageState<ScriptDescriptor> {
     override val history: IReplStageHistory<ScriptDescriptor>
         get() = TODO("not implemented")
 
@@ -23,7 +26,18 @@ class JsState(override val lock: ReentrantReadWriteLock) : IReplStageState<Scrip
 
 }
 
-class CompiledToJsScript(
+abstract class JsCompilationState(
+    lock: ReentrantReadWriteLock,
+    val nameTables: NameTables,
+    val dependencies: List<ModuleDescriptor>) : JsState(lock)
+
+class JsEvaluationState(lock: ReentrantReadWriteLock, val engine: ScriptEngine) : JsState(lock) {
+    override fun dispose() {
+        engine.release()
+    }
+}
+
+class JsCompiledScript(
     val jsCode: String,
     override val compilationConfiguration: ScriptCompilationConfiguration
 ) : CompiledScript<Any> {

libraries/scripting/js/src/org/jetbrains/kotlin/scripting/repl/js/JsScriptEvaluator.kt

@@ -17,7 +17,7 @@ class JsScriptEvaluator : ScriptEvaluator {
         scriptEvaluationConfiguration: ScriptEvaluationConfiguration
     ): ResultWithDiagnostics<EvaluationResult> {
         return try {
-            val evalResult = engine.eval<Any?>((compiledScript as CompiledToJsScript).jsCode)
+            val evalResult = engine.eval<Any?>((compiledScript as JsCompiledScript).jsCode)
             ResultWithDiagnostics.Success(
                 EvaluationResult(
                     ResultValue.Value(