replace some hardcoded .idea literals with references

java/idea-ui/src/com/intellij/platform/templates/LocalArchivedTemplate.java

@@ -19,6 +19,7 @@ import com.intellij.ide.util.projectWizard.WizardInputField;
 import com.intellij.openapi.module.Module;
 import com.intellij.openapi.module.ModuleType;
 import com.intellij.openapi.module.ModuleTypeManager;
+import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Condition;
 import com.intellij.openapi.util.IconLoader;
 import com.intellij.openapi.util.JDOMUtil;
@@ -43,8 +44,8 @@ import java.util.zip.ZipInputStream;
  */
 public class LocalArchivedTemplate extends ArchivedProjectTemplate {
 
-  public static final String DESCRIPTION_PATH = ".idea/description.html";
-  static final String IDEA_INPUT_FIELDS_XML = ".idea/project-template.xml";
+  public static final String DESCRIPTION_PATH = Project.DIRECTORY_STORE_FOLDER + "/description.html";
+  static final String IDEA_INPUT_FIELDS_XML = Project.DIRECTORY_STORE_FOLDER + "/project-template.xml";
 
   private final URL myArchivePath;
   private final ModuleType myModuleType;

java/idea-ui/src/com/intellij/platform/templates/SaveProjectAsTemplateAction.java

@@ -162,7 +162,7 @@ public class SaveProjectAsTemplateAction extends AnAction {
               if (relativePath == null) {
                 throw new RuntimeException("Can't find relative path for " + virtualFile);
               }
-              final boolean system = ".idea".equals(virtualFile.getParent().getName());
+              final boolean system = Project.DIRECTORY_STORE_FOLDER.equals(virtualFile.getParent().getName());
               if (system) {
                 if (!fileName.equals("description.html") &&
                     !fileName.equals(PROJECT_TEMPLATE_XML) &&

java/idea-ui/src/com/intellij/platform/templates/SystemFileProcessor.java

@@ -53,7 +53,7 @@ public class SystemFileProcessor extends ProjectTemplateFileProcessor {
   @Override
   protected String encodeFileText(String content, VirtualFile file, Project project) throws IOException {
     final String fileName = file.getName();
-    if (file.getParent().getName().equals(".idea") && fileName.equals("workspace.xml")) {
+    if (file.getParent().getName().equals(Project.DIRECTORY_STORE_FOLDER) && fileName.equals("workspace.xml")) {
 
       List<Object> componentList = new ArrayList<Object>();
       for (String componentName : COMPONENT_NAMES) {

java/idea-ui/src/com/intellij/platform/templates/TemplateModuleBuilder.java

@@ -205,7 +205,7 @@ public class TemplateModuleBuilder extends ModuleBuilder {
         @Nullable
         @Override
         public String fun(String path) {
-          if (moduleMode && path.contains(".idea")) return null;
+          if (moduleMode && path.contains(Project.DIRECTORY_STORE_FOLDER)) return null;
           if (basePackage != null) {
             return path.replace(getPathFragment(basePackage.getDefaultValue()), getPathFragment(basePackage.getValue()));
           }

java/idea-ui/src/com/intellij/projectImport/ProjectFormatPanel.java

@@ -23,13 +23,14 @@ package com.intellij.projectImport;
 import com.intellij.ide.util.PropertiesComponent;
 import com.intellij.ide.util.projectWizard.WizardContext;
 import com.intellij.openapi.components.StorageScheme;
+import com.intellij.openapi.project.Project;
 
 import javax.swing.*;
 
 public class ProjectFormatPanel {
 
   private static final String STORAGE_FORMAT_PROPERTY = "default.storage.format";
-  public static final String DIR_BASED = ".idea (directory based)";
+  public static final String DIR_BASED = Project.DIRECTORY_STORE_FOLDER + " (directory based)";
   private static final String FILE_BASED = ".ipr (file based)";
 
   private JComboBox myStorageFormatCombo;

platform/core-api/src/com/intellij/openapi/project/Project.java

@@ -26,7 +26,7 @@ import org.jetbrains.annotations.Nullable;
  * Project interface class.
  */
 public interface Project extends ComponentManager, AreaInstance {
-  @NonNls String DIRECTORY_STORE_FOLDER = ".idea";
+  @NonNls String DIRECTORY_STORE_FOLDER = ProjectCoreUtil.DIRECTORY_BASED_PROJECT_DIR;
 
   /**
    * Returns a name ot the project. For a directory-based project it's an arbitrary string specified by user at project creation

platform/testFramework/src/com/intellij/openapi/application/ex/PathManagerEx.java

@@ -26,6 +26,7 @@ package com.intellij.openapi.application.ex;
 
 import com.intellij.openapi.application.PathManager;
 import com.intellij.openapi.module.impl.ModuleManagerImpl;
+import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.JDOMUtil;
 import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.util.text.StringUtil;
@@ -387,7 +388,7 @@ public class PathManagerEx {
     }
 
     ourCommunityModules = new THashSet<String>();
-    File modulesXml = findFileUnderCommunityHome(".idea/modules.xml");
+    File modulesXml = findFileUnderCommunityHome(Project.DIRECTORY_STORE_FOLDER + "/modules.xml");
     if (!modulesXml.exists()) {
       throw new IllegalStateException("Cannot obtain test data path: " + modulesXml.getAbsolutePath() + " not found");
     }

platform/vcs-impl/src/com/intellij/openapi/vcs/impl/DefaultVcsRootPolicy.java

@@ -52,7 +52,7 @@ public abstract class DefaultVcsRootPolicy {
     final StorageScheme storageScheme = ((ProjectEx) project).getStateStore().getStorageScheme();
     boolean isDirectoryBased = StorageScheme.DIRECTORY_BASED.equals(storageScheme);
     final String[] parts = new String[] {"Content roots of all modules", "all immediate descendants of project base directory",
-      ".idea directory contents"};
+      Project.DIRECTORY_STORE_FOLDER + " directory contents"};
     final StringBuilder sb = new StringBuilder(parts[0]);
     if (isDirectoryBased) {
       sb.append(", ");