Implement support for new script customizations in command line compiler

refactor and fix internals in many places to make it work
add appropriate tests for main-kts case

libraries/tools/kotlin-main-kts-test/build.gradle.kts

@@ -7,8 +7,10 @@ plugins {
 
 dependencies {
     testCompile(project(":kotlin-main-kts"))
+    testCompileOnly(project(":compiler:cli"))
     testCompile(project(":kotlin-scripting-jvm-host-embeddable"))
     testCompile(commonDep("junit"))
+    testCompile(projectTests(":kotlin-scripting-compiler")) { isTransitive = false }
 }
 
 sourceSets {

libraries/tools/kotlin-main-kts-test/test/org/jetbrains/kotlin/mainKts/test/mainKtsIT.kt

@@ -6,6 +6,7 @@
 package org.jetbrains.kotlin.mainKts.test
 
 import junit.framework.Assert.*
+import org.jetbrains.kotlin.scripting.compiler.plugin.runWithK2JVMCompiler
 import org.junit.Test
 import java.io.File
 import java.io.InputStream
@@ -71,9 +72,7 @@ class mainKtsIT {
             assertFalse("stderr thread not finished", stderrThread.isAlive)
             assertNull(stderrException.value)
             assertEquals(expectedOutPatterns.size, processOut.size)
-            for (i in 0 until expectedOutPatterns.size) {
-                val expectedPattern = expectedOutPatterns[i]
-                val actualLine = processOut[i]
+            for ((expectedPattern, actualLine) in expectedOutPatterns.zip(processOut)) {
                 assertTrue(
                     "line \"$actualLine\" do not match with expected pattern \"$expectedPattern\"",
                     Regex(expectedPattern).matches(actualLine)
@@ -92,4 +91,9 @@ class mainKtsIT {
     fun testResolveJunit() {
         runWithKotlinc("$TEST_DATA_ROOT/hello-resolve-junit.main.kts", listOf("Hello, World!"))
     }
+
+    @Test
+    fun testImport() {
+        runWithK2JVMCompiler("$TEST_DATA_ROOT/import-test.main.kts", listOf("Hi from common", "Hi from middle", "sharedVar == 5"))
+    }
 }

libraries/tools/kotlin-main-kts/src/org/jetbrains/kotlin/mainKts/scriptDef.kt

@@ -23,7 +23,11 @@ import kotlin.script.experimental.jvm.jvm
 import kotlin.script.experimental.jvm.updateClasspath
 
 @Suppress("unused")
-@KotlinScript(fileExtension = "main.kts", compilationConfiguration = MainKtsScriptDefinition::class)
+@KotlinScript(
+    fileExtension = "main.kts",
+    compilationConfiguration = MainKtsScriptDefinition::class,
+    evaluationConfiguration = MainKtsEvaluationConfiguration::class
+)
 abstract class MainKtsScript(val args: Array<String>)
 
 object MainKtsScriptDefinition : ScriptCompilationConfiguration(
@@ -40,6 +44,12 @@ object MainKtsScriptDefinition : ScriptCompilationConfiguration(
         }
     })
 
+object MainKtsEvaluationConfiguration : ScriptEvaluationConfiguration(
+    {
+        scriptsInstancesSharing(true)
+    }
+)
+
 class MainKtsConfigurator : RefineScriptCompilationConfigurationHandler {
     private val resolver = FilesAndIvyResolver()