CLI fix fox external list args. (#727)

Author: kschwab

pydantic_settings/sources/providers/cli.py

@@ -2,6 +2,7 @@
 
 from __future__ import annotations as _annotations
 
+import copy
 import json
 import re
 import shlex
@@ -476,7 +477,7 @@ def __call__(
                 args = sys.argv[1:]
             return self._load_env_vars(parsed_args=self._parse_args(self.root_parser, args))
         elif parsed_args is not None:
-            return self._load_env_vars(parsed_args=parsed_args)
+            return self._load_env_vars(parsed_args=copy.copy(parsed_args))
         else:
             return super().__call__()
 

tests/test_source_cli.py

@@ -2947,15 +2947,22 @@ class Cfg(BaseSettings):
     cli_settings = CliSettingsSource(Cfg, root_parser=parser)
 
     parser.add_argument('-e', '--extra', dest='extra', default=0, action='count')
+    parser.add_argument('--num-list', action='append', default=[1])
+    parser.add_argument('--str-list', action='append', default=['abc'])
 
     with monkeypatch.context() as m:
         m.setattr(sys, 'argv', ['example.py', '--pet', 'dog', '-eeee'])
 
         parsed_args = parser.parse_args()
 
     assert parsed_args.extra == 4
+    assert parsed_args.num_list == [1]
+    assert parsed_args.str_list == ['abc']
     # With parsed arguments passed to CliApp.run, the parser should not need to be called again.
     assert CliApp.run(Cfg, cli_args=parsed_args, cli_settings_source=cli_settings).model_dump() == {'pet': 'dog'}
+    assert parsed_args.extra == 4
+    assert parsed_args.num_list == [1]
+    assert parsed_args.str_list == ['abc']
 
 
 def test_cli_serialize_non_default_values():