Merge pull request #2856 from peper0/master

Possible fix for #2850.

Author: efiop

dvc/__main__.py

@@ -6,4 +6,4 @@
 from dvc.main import main
 
 if __name__ == "__main__":
-    main(sys.argv[1:])
+    sys.exit(main(sys.argv[1:]))