Extension point for detecting build system type used in project

Now we use a non-deprecated way to detect Maven modules

idea/idea-maven/src/org/jetbrains/kotlin/idea/maven/MavenDetector.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2000-2018 JetBrains s.r.o. 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.idea.maven
+
+import com.intellij.openapi.module.Module
+import org.jetbrains.idea.maven.project.MavenProjectsManager
+import org.jetbrains.kotlin.idea.configuration.BuildSystemType
+import org.jetbrains.kotlin.idea.configuration.BuildSystemTypeDetector
+
+object Maven : BuildSystemType()
+
+class MavenDetector : BuildSystemTypeDetector {
+    override fun detectBuildSystemType(module: Module): BuildSystemType? {
+        return if (MavenProjectsManager.getInstance(module.project).isMavenizedModule(module))
+            Maven
+        else
+            null
+    }
+}

idea/idea-maven/src/org/jetbrains/kotlin/idea/maven/configuration/KotlinMavenConfigurator.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2016 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.
+ * Copyright 2000-2018 JetBrains s.r.o. 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.idea.maven.configuration
@@ -43,7 +32,6 @@ import org.jetbrains.idea.maven.utils.MavenArtifactScope
 import org.jetbrains.kotlin.config.ApiVersion
 import org.jetbrains.kotlin.config.CoroutineSupport
 import org.jetbrains.kotlin.config.LanguageFeature
-import org.jetbrains.kotlin.idea.KotlinPluginUtil
 import org.jetbrains.kotlin.idea.configuration.*
 import org.jetbrains.kotlin.idea.facet.getRuntimeLibraryVersion
 import org.jetbrains.kotlin.idea.framework.ui.ConfigureDialogWithModulesAndVersion
@@ -60,7 +48,7 @@ abstract class KotlinMavenConfigurator
 
     override fun getStatus(moduleSourceRootGroup: ModuleSourceRootGroup): ConfigureKotlinStatus {
         val module = moduleSourceRootGroup.baseModule
-        if (!KotlinPluginUtil.isMavenModule(module))
+        if (module.getBuildSystemType() != Maven)
             return ConfigureKotlinStatus.NON_APPLICABLE
 
         val psi = runReadAction { findModulePomFile(module) }