From ee1a4411f889e981c7fb795ce70b06e3922a1d4d Mon Sep 17 00:00:00 2001
From: Girish Ramakrishnan <girish@cloudron.io>
Date: Thu, 5 Oct 2017 10:57:46 -0700
Subject: [PATCH] Do not crash if prefix is empty string

('' || undefined) will return undefined ...
---
 src/backups.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/backups.js b/src/backups.js
index 4f8afcc32..17e41a1df 100644
--- a/src/backups.js
+++ b/src/backups.js
@@ -170,9 +170,9 @@ function getBackupFilePath(backupConfig, backupId, format) {
 
     if (format === 'tgz') {
         const fileType = backupConfig.key ? '.tar.gz.enc' : '.tar.gz';
-        return path.join(backupConfig.prefix || backupConfig.backupFolder, backupId+fileType);
+        return path.join(backupConfig.prefix || backupConfig.backupFolder || '', backupId+fileType);
     } else {
-        return path.join(backupConfig.prefix || backupConfig.backupFolder, backupId);
+        return path.join(backupConfig.prefix || backupConfig.backupFolder || '', backupId);
     }
 }