--- a/lucene/src/luan/modules/lucene/LuceneIndex.java	Tue May 17 19:00:25 2016 -0600
+++ b/lucene/src/luan/modules/lucene/LuceneIndex.java	Wed May 18 15:46:51 2016 -0600
@@ -276,7 +276,7 @@
 		return id;
 	}
 
-
+/*
 	public void backup(String zipFile) throws LuanException, IOException {
 		if( !zipFile.endsWith(".zip") )
 			throw new LuanException("file "+zipFile+" doesn't end with '.zip'");
@@ -295,6 +295,17 @@
 			snapshotDeletionPolicy.release(ic);
 		}
 	}
+*/
+	public Object snapshot(LuanState luan,LuanFunction fn) throws LuanException, IOException {
+		IndexCommit ic = snapshotDeletionPolicy.snapshot();
+		try {
+			String dir = fileDir.toString();
+			LuanTable fileNames = new LuanTable(new ArrayList(ic.getFileNames()));
+			return fn.call(luan,new Object[]{dir,fileNames});
+		} finally {
+			snapshotDeletionPolicy.release(ic);
+		}
+	}