From f259bc52cdb907226d64f25108dd1e90e783e2f0 Mon Sep 17 00:00:00 2001
From: Ruslan Kuprieiev <kupruser@gmail.com>
Date: Wed, 10 Jun 2020 02:32:18 +0300
Subject: [PATCH] config/remote/cache: make --system/--global/--local mutually
 exclusive (#4000)

---
 dvc/command/config.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/dvc/command/config.py b/dvc/command/config.py
index ed2203c50..f536dd04c 100644
--- a/dvc/command/config.py
+++ b/dvc/command/config.py
@@ -50,21 +50,22 @@ class CmdConfig(CmdBaseNoRepo):
 
 
 parent_config_parser = argparse.ArgumentParser(add_help=False)
-parent_config_parser.add_argument(
+level_group = parent_config_parser.add_mutually_exclusive_group()
+level_group.add_argument(
     "--global",
     dest="level",
     action="store_const",
     const="global",
     help="Use global config.",
 )
-parent_config_parser.add_argument(
+level_group.add_argument(
     "--system",
     dest="level",
     action="store_const",
     const="system",
     help="Use system config.",
 )
-parent_config_parser.add_argument(
+level_group.add_argument(
     "--local",
     dest="level",
     action="store_const",