Wizard: show experimental new project wizard only by registry flag

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/NewProjectWizardModuleBuilder.kt

@@ -39,6 +39,8 @@ class NewProjectWizardModuleBuilder : ModuleBuilder() {
         const val MODULE_BUILDER_ID = "kotlin.newProjectWizard.builder"
     }
 
+    override fun isAvailable(): Boolean = NewProjectWizardService.isEnabled
+
     private var wizardContext: WizardContext? = null
 
     override fun getModuleType(): ModuleType<*> = NewProjectWizardModuleType()

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/NewProjectWizardService.kt

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.tools.projectWizard.wizard
+
+import com.intellij.openapi.util.registry.Registry
+
+object NewProjectWizardService {
+    val isEnabled: Boolean
+        get() = Registry.`is`("kotlin.experimental.project.wizard", false)
+}

idea/resources/META-INF/extensions/ide.xml

@@ -122,6 +122,10 @@
                      restartRequired="false"/>
         <fileEditorProvider implementation="org.jetbrains.kotlin.idea.scratch.ui.KtScratchFileEditorProvider"/>
 
+        <registryKey key="kotlin.experimental.project.wizard"
+                     description="Use experimental project wizard for creating new Kotlin projects"
+                     defaultValue="false"
+                     restartRequired="false"/>
         <moduleBuilder builderClass="org.jetbrains.kotlin.tools.projectWizard.wizard.NewProjectWizardModuleBuilder"/>
     </extensions>
 </idea-plugin>

idea/resources/META-INF/extensions/ide.xml.183

@@ -121,6 +121,11 @@
                      defaultValue="false"
                      restartRequired="true"/>
         <fileEditorProvider implementation="org.jetbrains.kotlin.idea.scratch.ui.KtScratchFileEditorProvider"/>
+
+         <registryKey key="kotlin.experimental.project.wizard"
+                             description="Use experimental project wizard for creating new Kotlin projects"
+                             defaultValue="false"
+                             restartRequired="false"/>
         <moduleBuilder builderClass="org.jetbrains.kotlin.tools.projectWizard.wizard.NewProjectWizardModuleBuilder"/>
     </extensions>
 </idea-plugin>

idea/resources/META-INF/extensions/ide.xml.as34

@@ -112,6 +112,11 @@
                      defaultValue="false"
                      restartRequired="true"/>
             <fileEditorProvider implementation="org.jetbrains.kotlin.idea.scratch.ui.KtScratchFileEditorProvider"/>
+
+             <registryKey key="kotlin.experimental.project.wizard"
+                                 description="Use experimental project wizard for creating new Kotlin projects"
+                                 defaultValue="false"
+                                 restartRequired="false"/>
             <moduleBuilder builderClass="org.jetbrains.kotlin.tools.projectWizard.wizard.NewProjectWizardModuleBuilder"/>
     </extensions>
 </idea-plugin>