K2 Scripting: implement basic metadata serialization support

#KT-62305 fixed
NB: kotlin reflection do not see script class constructor after
this change, and it's ok, since the fact that the script is compiled
into a class is an implementation detail.
If needed, java reflection could be used to access the constructor.

libraries/scripting/jvm-host-test/test/kotlin/script/experimental/jvmhost/test/ImplicitsFromScriptResultTest.kt

@@ -35,7 +35,7 @@ import kotlin.script.experimental.jvmhost.JvmScriptCompiler
  */
 class ImplicitsFromScriptResultTest : TestCase() {
 
-    fun testImplicits() = expectTestToFailOnK2 {
+    fun testImplicits() {
         // the implementation of the Compiler Host doesn't work with IR - the inter-script symbol table
         // should be maintained to make it run (see latest REPL compiler implementations for details
         // TODO: consider either fix it or rewrite to the REPL compiler

libraries/tools/kotlinp/test/org/jetbrains/kotlin/kotlinp/test/GenerateKotlinpTests.kt

@@ -16,7 +16,7 @@ fun main(args: Array<String>) {
                 model("")
             }
             testClass<AbstractK2KotlinpTest> {
-                model("")
+                model("", pattern = "^(.*)\\.kts?$")
             }
         }
     }

libraries/tools/kotlinp/test/org/jetbrains/kotlin/kotlinp/test/K2KotlinpTestGenerated.java

@@ -26,7 +26,7 @@ public class K2KotlinpTestGenerated extends AbstractK2KotlinpTest {
     }
 
     public void testAllFilesPresentInTestData() throws Exception {
-        KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("libraries/tools/kotlinp/testData"), Pattern.compile("^(.+)\\.kt$"), null, true);
+        KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("libraries/tools/kotlinp/testData"), Pattern.compile("^(.*)\\.kts?$"), null, true);
     }
 
     @TestMetadata("Annotations.kt")
@@ -109,6 +109,11 @@ public class K2KotlinpTestGenerated extends AbstractK2KotlinpTest {
         runTest("libraries/tools/kotlinp/testData/Properties.kt");
     }
 
+    @TestMetadata("scriptSimple.kts")
+    public void testScriptSimple() throws Exception {
+        runTest("libraries/tools/kotlinp/testData/scriptSimple.kts");
+    }
+
     @TestMetadata("SimpleClass.kt")
     public void testSimpleClass() throws Exception {
         runTest("libraries/tools/kotlinp/testData/SimpleClass.kt");
@@ -163,7 +168,7 @@ public class K2KotlinpTestGenerated extends AbstractK2KotlinpTest {
         }
 
         public void testAllFilesPresentInJvmDefault() throws Exception {
-            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("libraries/tools/kotlinp/testData/jvmDefault"), Pattern.compile("^(.+)\\.kt$"), null, true);
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("libraries/tools/kotlinp/testData/jvmDefault"), Pattern.compile("^(.*)\\.kts?$"), null, true);
         }
 
         @TestMetadata("withCompatibility.kt")
@@ -186,7 +191,7 @@ public class K2KotlinpTestGenerated extends AbstractK2KotlinpTest {
         }
 
         public void testAllFilesPresentInLocalClasses() throws Exception {
-            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("libraries/tools/kotlinp/testData/localClasses"), Pattern.compile("^(.+)\\.kt$"), null, true);
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("libraries/tools/kotlinp/testData/localClasses"), Pattern.compile("^(.*)\\.kts?$"), null, true);
         }
 
         @TestMetadata("AnonymousObject.kt")

libraries/tools/kotlinp/test/org/jetbrains/kotlin/kotlinp/test/KotlinpTestUtils.kt

@@ -95,7 +95,7 @@ private fun compileAndPrintAllFiles(
     }
 
     if (compareWithTxt) {
-        KotlinTestUtils.assertEqualsToFile(File(file.path.replace(".kt", ".txt")), main.toString())
+        KotlinTestUtils.assertEqualsToFile(File(file.path.replace(".kt.?".toRegex(), ".txt")), main.toString())
     }
 
     if (readWriteAndCompare && InTextDirectivesUtils.findStringWithPrefixes(file.readText(), "// NO_READ_WRITE_COMPARE") == null) {

libraries/tools/kotlinp/testData/scriptSimple.kts

@@ -0,0 +1,9 @@
+
+val a = 42
+
+class A(val p: String)
+
+fun A.foo() = p
+
+class B<T>(val v: T & Any)
+

libraries/tools/kotlinp/testData/scriptSimple.txt

@@ -0,0 +1,52 @@
+// ScriptSimple.class
+// ------------------------------------------
+public final class ScriptSimple {
+
+  // signature: foo(LScriptSimple$A;)Ljava/lang/String;
+  public final fun A.foo(): kotlin/String
+
+  // field: a:I
+  // getter: getA()I
+  public final val a: kotlin/Int /* = ... */
+    public final get
+
+  // nested class: A
+
+  // nested class: B
+
+  // module name: test-module
+}
+// ScriptSimple$A.class
+// ------------------------------------------
+public final class A : kotlin/Any {
+
+  // signature: <init>(Ljava/lang/String;)V
+  public constructor(p: kotlin/String)
+
+  // field: p:Ljava/lang/String;
+  // getter: getP()Ljava/lang/String;
+  public final val p: kotlin/String
+    public final get
+
+  // module name: test-module
+}
+// ScriptSimple$B.class
+// ------------------------------------------
+public final class B<T#0 /* T */> : kotlin/Any {
+
+  // requires language version 1.7.0 (level=ERROR)
+  // signature: <init>(Ljava/lang/Object;)V
+  public constructor(v: T#0 & Any)
+
+  // requires language version 1.7.0 (level=ERROR)
+  // field: v:Ljava/lang/Object;
+  // getter: getV()Ljava/lang/Object;
+  public final val v: T#0 & Any
+    public final get
+
+  // module name: test-module
+}
+// META-INF/test-module.kotlin_module
+// ------------------------------------------
+module {
+}