auth:export - Ensure all fetched and transformed data is written to f…

…ile before exit (#1642)

CHANGELOG.md

@@ -0,0 +1 @@
+* Ensures `auth:export` results are fully flushed to the output file.

src/commands/auth-export.js

@@ -41,5 +41,12 @@ module.exports = new Command("auth:export [dataFile]")
         writeStream.write("]}");
       }
       writeStream.end();
+      // Ensure process ends only when all data have been flushed
+      // to the output file
+      return new Promise(function(resolve, reject) {
+        writeStream.on("finish", resolve);
+        writeStream.on("close", resolve);
+        writeStream.on("error", reject);
+      });
     });
   });