support for configuring Kotlin when creating new Gradle project

#KT-7978 Fixed

idea/src/META-INF/gradle.xml

@@ -3,4 +3,7 @@
     <projectConfigurator implementation="org.jetbrains.kotlin.idea.configuration.KotlinAndroidGradleModuleConfigurator"/>
     <projectConfigurator implementation="org.jetbrains.kotlin.idea.configuration.KotlinGradleModuleConfigurator"/>
   </extensions>
+  <extensions defaultExtensionNs="org.jetbrains.plugins.gradle">
+      <frameworkSupport implementation="org.jetbrains.kotlin.idea.configuration.GradleKotlinJavaFrameworkSupportProvider"/>
+  </extensions>
 </idea-plugin>

idea/src/org/jetbrains/kotlin/idea/configuration/GradleKotlinJavaFrameworkSupportProvider.kt

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2010-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.idea.configuration
+
+import com.intellij.framework.FrameworkTypeEx
+import com.intellij.framework.addSupport.FrameworkSupportInModuleProvider
+import com.intellij.openapi.module.Module
+import com.intellij.openapi.roots.ModifiableModelsProvider
+import com.intellij.openapi.roots.ModifiableRootModel
+import org.jetbrains.kotlin.idea.KotlinIcons
+import org.jetbrains.kotlin.idea.versions.KotlinRuntimeLibraryUtil
+import org.jetbrains.plugins.gradle.frameworkSupport.BuildScriptDataBuilder
+import org.jetbrains.plugins.gradle.frameworkSupport.GradleFrameworkSupportProvider
+import javax.swing.Icon
+
+public class GradleKotlinJavaFrameworkSupportProvider() : GradleFrameworkSupportProvider() {
+    override fun getFrameworkType(): FrameworkTypeEx = object : FrameworkTypeEx("KOTLIN") {
+        override fun getIcon(): Icon = KotlinIcons.FILE
+
+        override fun getPresentableName(): String = "Kotlin (Java)"
+
+        override fun createProvider(): FrameworkSupportInModuleProvider = this@GradleKotlinJavaFrameworkSupportProvider
+    }
+
+    override fun addSupport(module: Module,
+                            rootModel: ModifiableRootModel,
+                            modifiableModelsProvider: ModifiableModelsProvider,
+                            buildScriptData: BuildScriptDataBuilder) {
+        var kotlinVersion = KotlinRuntimeLibraryUtil.bundledRuntimeVersion()
+        if (kotlinVersion == "@snapshot@") {
+            kotlinVersion = "0.1-SNAPSHOT"
+            buildScriptData.addBuildscriptRepositoriesDefinition("mavenCentral()")
+
+            val snapshotRepository = KotlinWithGradleConfigurator.SNAPSHOT_REPOSITORY.replace('\n', ' ')
+            buildScriptData.addBuildscriptRepositoriesDefinition(snapshotRepository)
+
+            buildScriptData.addRepositoriesDefinition("mavenCentral()")
+            buildScriptData.addRepositoriesDefinition(snapshotRepository)
+        }
+
+        buildScriptData
+                .addPluginDefinition(KotlinGradleModuleConfigurator.APPLY_KOTLIN)
+
+                // TODO: once IDEA-148110 is fixed, define kotlin_version property in buildscript
+                .addDependencyNotation(KotlinWithGradleConfigurator.LIBRARY.replace("\$kotlin_version", kotlinVersion))
+                .addBuildscriptDependencyNotation(KotlinWithGradleConfigurator.CLASSPATH.replace("\$kotlin_version", kotlinVersion))
+    }
+}

idea/src/org/jetbrains/kotlin/idea/configuration/KotlinGradleModuleConfigurator.java

@@ -27,7 +27,7 @@ import org.jetbrains.plugins.groovy.lang.psi.api.statements.blocks.GrClosableBlo
 public class KotlinGradleModuleConfigurator extends KotlinWithGradleConfigurator {
     public static final String NAME = "gradle";
 
-    private static final String APPLY_KOTLIN = "apply plugin: 'kotlin'";
+    public static final String APPLY_KOTLIN = "apply plugin: 'kotlin'";
 
     @NotNull
     @Override

idea/src/org/jetbrains/kotlin/idea/configuration/KotlinWithGradleConfigurator.java

@@ -57,8 +57,8 @@ public abstract class KotlinWithGradleConfigurator implements KotlinProjectConfi
 
     protected static final String CLASSPATH = "classpath \"org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version\"";
     protected static final String SNAPSHOT_REPOSITORY = "maven {\nurl 'http://oss.sonatype.org/content/repositories/snapshots'\n}";
-    protected static final String REPOSITORY = "mavenCentral()\n";
-    protected static final String LIBRARY = "compile \"org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version\"";
+    public static final String REPOSITORY = "mavenCentral()\n";
+    public static final String LIBRARY = "compile \"org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version\"";
     protected static final String SOURCE_SET = "main.java.srcDirs += 'src/main/kotlin'\n";
     protected static final String VERSION = String.format("ext.kotlin_version = '%s'", VERSION_TEMPLATE);