[IFT] Extract 'markDirectoryAsSourcesRoot' method to ProjectUtils

IJ-CR-18000

GitOrigin-RevId: e895753205b6edf6e848d16afd474b2b7a8cf5f0

python/python-features-trainer/src/com/jetbrains/python/ift/PythonLangSupport.kt

@@ -1,16 +1,10 @@
 // Copyright 2000-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.jetbrains.python.ift
 
-import com.intellij.openapi.application.runWriteAction
-import com.intellij.openapi.diagnostic.thisLogger
 import com.intellij.openapi.project.Project
-import com.intellij.openapi.roots.ModuleRootManager
-import com.intellij.openapi.vfs.LocalFileSystem
-import com.intellij.openapi.vfs.VfsUtilCore
-import com.jetbrains.python.statistics.modules
+import training.project.ProjectUtils
 import training.project.ReadMeCreator
 import training.util.getFeedbackLink
-import java.io.File
 
 class PythonLangSupport : PythonBasedLangSupport() {
   override val contentRootDirectoryName = "PyCharmLearningProject"
@@ -28,31 +22,6 @@ class PythonLangSupport : PythonBasedLangSupport() {
   override val readMeCreator = ReadMeCreator()
 
   override fun applyToProjectAfterConfigure(): (Project) -> Unit = { project ->
-    // mark src directory as sources root
-    if (project.modules.size > 1) {
-      thisLogger().error("The learning project has more than one module: ${project.modules.map { it.name }}")
-    }
-    val module = project.modules.first()
-    val sourcesPath = project.basePath!! + '/' + sourcesDirectoryName
-    val sourcesRoot = LocalFileSystem.getInstance().refreshAndFindFileByPath(sourcesPath)
-    if (sourcesRoot == null) {
-      val status = when {
-        !File(sourcesPath).exists() -> "does not exist"
-        File(sourcesPath).isDirectory -> "existed directory"
-        else -> "it is regular file"
-      }
-      error("Failed to find directory with source files: $sourcesPath ($status)")
-    }
-    val rootsModel = ModuleRootManager.getInstance(module).modifiableModel
-    val contentEntry = rootsModel.contentEntries.find {
-      val contentEntryFile = it.file
-      contentEntryFile != null && VfsUtilCore.isAncestor(contentEntryFile, sourcesRoot, false)
-    } ?: error("Failed to find content entry for file: ${sourcesRoot.name}")
-
-    contentEntry.addSourceFolder(sourcesRoot, false)
-    runWriteAction {
-      rootsModel.commit()
-      project.save()
-    }
+    ProjectUtils.markDirectoryAsSourcesRoot(project, sourcesDirectoryName)
   }
 }