ensure we have atleast 1GB before making an update

src/updater.js

@@ -148,9 +148,11 @@ async function update(boxUpdateInfo, options, progressCallback) {
         progressCallback({ percent: 10, message: 'Backing up' });
 
         await backuptask.fullBackup({ preserveSecs: 3*7*24*60*60 }, (progress) => progressCallback({ percent: 10+progress.percent*70/100, message: progress.message }));
+
+        await checkFreeDiskSpace(1024*1024*1024); // check again in case backup is in same disk
     }
 
-    debug('updating box %s', boxUpdateInfo.sourceTarballUrl);
+    debug(`Updating box with ${boxUpdateInfo.sourceTarballUrl}`);
 
     progressCallback({ percent: 70, message: 'Installing update' });