backupformat: getFileExtension

src/backupformat/tgz.js

@@ -254,9 +254,16 @@ async function upload(backupTarget, remotePath, dataLayout, progressCallback) {
     });
 }
 
+function getFileExtension(encryption) {
+    assert.strictEqual(typeof encryption, 'boolean');
+
+    return encryption ? '.tar.gz.enc' : '.tar.gz';
+}
+
 exports = module.exports = {
     download,
     upload,
+    getFileExtension,
 
     // exported for testing
     _EnsureFileSizeStream: EnsureFileSizeStream