store per-target build caches corresponding to modules with case-only different names in separate directories (IDEA-181766)

jps/jps-builders-6/src/org/jetbrains/jps/incremental/BinaryContent.java

@@ -66,9 +66,8 @@ public final class BinaryContent {
       if (parentFile == null) {
         throw e;
       }
-      if (!parentFile.mkdirs()) {
-        throw e;
-      }
+      //noinspection ResultOfMethodCallIgnored
+      parentFile.mkdirs();
       // second attempt
       _writeToFile(file, this);
     }

jps/jps-builders/src/org/jetbrains/jps/builders/impl/BuildDataPathsImpl.java

@@ -49,6 +49,9 @@ public class BuildDataPathsImpl implements BuildDataPaths {
 
   @Override
   public File getTargetDataRoot(BuildTarget<?> target) {
-    return new File(getTargetTypeDataRoot(target.getTargetType()), PathUtilRt.suggestFileName(target.getId(), true, false));
+    final String targetId = target.getId();
+    // targetId may diff from another targetId only in case
+    // when used as a file name in case-insensitive file systems, both paths for different targets will point to the same dir
+    return new File(getTargetTypeDataRoot(target.getTargetType()), PathUtilRt.suggestFileName(targetId + "_" + Integer.toHexString(targetId.hashCode()), true, false));
   }
 }

jps/jps-builders/src/org/jetbrains/jps/incremental/storage/BuildDataManager.java

@@ -43,7 +43,7 @@ import java.util.concurrent.ConcurrentMap;
  *         Date: 10/7/11
  */
 public class BuildDataManager implements StorageOwner {
-  private static final int VERSION = 33 + (PersistentHashMapValueStorage.COMPRESSION_ENABLED ? 1:0);
+  private static final int VERSION = 35 + (PersistentHashMapValueStorage.COMPRESSION_ENABLED ? 1:0);
   private static final Logger LOG = Logger.getInstance("#org.jetbrains.jps.incremental.storage.BuildDataManager");
   private static final String SRC_TO_FORM_STORAGE = "src-form";
   private static final String OUT_TARGET_STORAGE = "out-target";