Better subprocess handling

src/pip/_internal/network/auth.py

@@ -138,13 +138,14 @@ class KeyRingCliProvider(KeyRingBaseProvider):
         """Mirror the implementation of keyring.set_password using cli"""
         if self.keyring is None:
             return None
-
-        cmd = [self.keyring, "set", service_name, username]
-        input_ = (password + os.linesep).encode("utf-8")
         env = os.environ.copy()
         env["PYTHONIOENCODING"] = "utf-8"
-        res = subprocess.run(cmd, input=input_, env=env)
-        res.check_returncode()
+        subprocess.run(
+            [self.keyring, "set", service_name, username],
+            input=f"{password}{os.linesep}".encode("utf-8"),
+            env=env,
+            check=True,
+        )
         return None
 
 

tests/unit/test_network_auth.py

@@ -406,11 +406,13 @@ class KeyringSubprocessResult(KeyringModuleV1):
         stdin: Optional[Any] = None,
         stdout: Optional[Any] = None,
         input: Optional[bytes] = None,
+        check: Optional[bool] = None
     ) -> Any:
         if cmd[1] == "get":
             assert stdin == -3  # subprocess.DEVNULL
             assert stdout == subprocess.PIPE
             assert env["PYTHONIOENCODING"] == "utf-8"
+            assert check is None
 
             password = self.get_password(*cmd[2:])
             if password is None:
@@ -426,6 +428,7 @@ class KeyringSubprocessResult(KeyringModuleV1):
             assert stdout is None
             assert env["PYTHONIOENCODING"] == "utf-8"
             assert input is not None
+            assert check
 
             # Input from stdin is encoded
             self.set_password(cmd[2], cmd[3], input.decode("utf-8").strip(os.linesep))