Add a compiler option to disable default scripting plugin

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JVMCompilerArguments.kt

@@ -231,6 +231,9 @@ class K2JVMCompilerArguments : CommonCompilerArguments() {
     @Argument(value = "-Xenable-jvm-default", description = "Allow to use '@JvmDefault' for JVM default method support")
     var enableJvmDefault: Boolean by FreezableVar(false)
 
+    @Argument(value = "-Xdisable-default-scripting-plugin", description = "Do not enable scripting plugin by default")
+    var disableDefaultScriptingPlugin: Boolean by FreezableVar(false)
+
     // Paths to output directories for friend modules.
     var friendPaths: Array<String>? by FreezableVar(null)
 

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/K2JVMCompiler.kt

@@ -232,7 +232,10 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
                 true
             }
 
-        if (!isEmbeddable && pluginClasspaths.none { File(it).name == PathUtil.KOTLIN_SCRIPTING_COMPILER_PLUGIN_JAR }) {
+        if (!isEmbeddable &&
+            pluginClasspaths.none { File(it).name == PathUtil.KOTLIN_SCRIPTING_COMPILER_PLUGIN_JAR } &&
+            !arguments.disableDefaultScriptingPlugin
+        ) {
             // if scripting plugin is not enabled explicitly (probably from another path) try to enable it implicitly
             val libPath = paths?.libPath ?: File(".")
             val pluginJar = File(libPath, PathUtil.KOTLIN_SCRIPTING_COMPILER_PLUGIN_JAR)

compiler/testData/cli/jvm/extraHelp.out

@@ -9,6 +9,8 @@ where advanced options include:
                              Normalize constructor calls (disable: don't normalize; enable: normalize), default is disable
   -Xdump-declarations-to=<path> Path to JSON file to dump Java to Kotlin declaration mappings
   -Xenable-jvm-default       Allow to use '@JvmDefault' for JVM default method support
+  -Xdisable-default-scripting-plugin
+                             Do not enable scripting plugin by default
   -Xmultifile-parts-inherit  Compile multifile classes as a hierarchy of parts and facade
   -Xmodule-path=<path>       Paths where to find Java 9+ modules
   -Xjavac-arguments=<option[,]> Java compiler arguments