[App Service] Fix #32290: az functionapp config appsettings set --slot-settings: Fix the command failure to update existing slot settings

src/azure-cli/azure/cli/command_modules/appservice/custom.py

@@ -513,7 +513,7 @@ def update_app_settings_functionapp(cmd, resource_group_name, name, settings=Non
 
 def update_app_settings(cmd, resource_group_name, name, settings=None, slot=None, slot_settings=None):
     if not settings and not slot_settings:
-        raise MutuallyExclusiveArgumentError('Usage Error: --settings |--slot-settings')
+        raise MutuallyExclusiveArgumentError('Please provide either --settings or --slot-settings parameter.')
 
     settings = settings or []
     slot_settings = slot_settings or []
@@ -545,26 +545,30 @@ def update_app_settings(cmd, resource_group_name, name, settings=None, slot=None
                             slot_result[t['name']] = True
                         result[t['name']] = t['value']
                 else:
-                    dest.update(temp)
-            except CLIError:
-                setting_name, value = s.split('=', 1)
-                dest[setting_name] = value
-                result.update(dest)
+                    # For slot settings JSON objects, add values to result and mark as slot settings
+                    if setting_type == "SlotSettings":
+                        result.update(temp)
+                        for key in temp.keys():
+                            slot_result[key] = True
+                    else:
+                        dest.update(temp)
+            except InvalidArgumentValueError:
+                try:
+                    setting_name, value = s.split('=', 1)
+                    dest[setting_name] = value
+                    result.update(dest)
+                except ValueError as ex:
+                    raise InvalidArgumentValueError(
+                        f"Invalid setting format: '{s}'. Expected 'key=value' format or valid JSON.",
+                        recommendation="Use 'key=value' format or provide valid JSON like '{\"key\": \"value\"}'."
+                    ) from ex
 
     for setting_name, value in result.items():
         app_settings.properties[setting_name] = value
     client = web_client_factory(cmd.cli_ctx)
 
-
-# TODO: Centauri currently return wrong payload for update appsettings, remove this once backend has the fix.
-    if is_centauri_functionapp(cmd, resource_group_name, name):
-        update_application_settings_polling(cmd, resource_group_name, name, app_settings, slot, client)
-        result = _generic_site_operation(cmd.cli_ctx, resource_group_name, name, 'list_application_settings', slot)
-    else:
-        result = _generic_settings_operation(cmd.cli_ctx, resource_group_name, name,
-                                             'update_application_settings',
-                                             app_settings, slot, client)
-
+    # Process slot configurations before updating application settings to ensure proper configuration order.
+    # This ensures that slot settings are properly configured before the values are applied
     app_settings_slot_cfg_names = []
     if slot_result:
         slot_cfg_names = client.web_apps.list_slot_configuration_names(resource_group_name, name)
@@ -578,6 +582,15 @@ def update_app_settings(cmd, resource_group_name, name, settings=None, slot=None
         app_settings_slot_cfg_names = slot_cfg_names.app_setting_names
         client.web_apps.update_slot_configuration_names(resource_group_name, name, slot_cfg_names)
 
+# TODO: Centauri currently return wrong payload for update appsettings, remove this once backend has the fix.
+    if is_centauri_functionapp(cmd, resource_group_name, name):
+        update_application_settings_polling(cmd, resource_group_name, name, app_settings, slot, client)
+        result = _generic_site_operation(cmd.cli_ctx, resource_group_name, name, 'list_application_settings', slot)
+    else:
+        result = _generic_settings_operation(cmd.cli_ctx, resource_group_name, name,
+                                             'update_application_settings',
+                                             app_settings, slot, client)
+
     return _build_app_settings_output(result.properties, app_settings_slot_cfg_names, redact=True)
 
 
@@ -597,7 +610,7 @@ def update_application_settings_polling(cmd, resource_group_name, name, app_sett
                 time.sleep(5)
                 r = send_raw_request(cmd.cli_ctx, method='get', url=poll_url)
         else:
-            raise CLIError(ex)
+            raise AzureResponseError(f"Failed to update application settings: {str(ex)}") from ex
 
 
 def add_azure_storage_account(cmd, resource_group_name, name, custom_id, storage_type, account_name,

src/azure-cli/azure/cli/command_modules/appservice/tests/latest/test_webapp_commands_thru_mock.py

@@ -10,6 +10,9 @@
 
 from azure.mgmt.web import WebSiteManagementClient
 from knack.util import CLIError
+from azure.cli.core.azclierror import (InvalidArgumentValueError,
+                                       MutuallyExclusiveArgumentError,
+                                       AzureResponseError)
 from azure.cli.command_modules.appservice.custom import (set_deployment_user,
                                                          update_git_token, add_hostname,
                                                          update_site_configs,
@@ -27,7 +30,9 @@
                                                          list_snapshots,
                                                          restore_snapshot,
                                                          create_managed_ssl_cert,
-                                                         add_github_actions)
+                                                         add_github_actions,
+                                                         update_app_settings,
+                                                         update_application_settings_polling)
 
 # pylint: disable=line-too-long
 from azure.cli.core.profiles import ResourceType
@@ -463,6 +468,174 @@ def test_create_managed_ssl_cert(self, generic_site_op_mock, client_factory_mock
                                                                      certificate_envelope=cert_def)
 
 
+    @mock.patch('azure.cli.command_modules.appservice.custom._generic_site_operation')
+    @mock.patch('azure.cli.command_modules.appservice.custom.web_client_factory')
+    @mock.patch('azure.cli.command_modules.appservice.custom.is_centauri_functionapp')
+    @mock.patch('azure.cli.command_modules.appservice.custom._generic_settings_operation')
+    @mock.patch('azure.cli.command_modules.appservice.custom._build_app_settings_output')
+    def test_update_app_settings_error_handling_no_parameters(self, mock_build, mock_settings_op, mock_centauri, 
+                                                             mock_client_factory, mock_site_op):
+        """Test that MutuallyExclusiveArgumentError is raised when neither settings nor slot_settings are provided"""
+        cmd_mock = _get_test_cmd()
+
+        # Test missing both parameters
+        with self.assertRaisesRegex(MutuallyExclusiveArgumentError, 
+                                   "Please provide either --settings or --slot-settings parameter"):
+            update_app_settings(cmd_mock, 'test-rg', 'test-app')
+
+        # Ensure mocks weren't called since we should fail early
+        mock_site_op.assert_not_called()
+        mock_client_factory.assert_not_called()
+
+    @mock.patch('azure.cli.command_modules.appservice.custom._generic_site_operation')
+    @mock.patch('azure.cli.command_modules.appservice.custom.web_client_factory')
+    @mock.patch('azure.cli.command_modules.appservice.custom.is_centauri_functionapp')
+    @mock.patch('azure.cli.command_modules.appservice.custom._generic_settings_operation')
+    @mock.patch('azure.cli.command_modules.appservice.custom._build_app_settings_output')
+    @mock.patch('azure.cli.command_modules.appservice.custom.shell_safe_json_parse')
+    def test_update_app_settings_error_handling_invalid_format(self, mock_json_parse, mock_build, mock_settings_op, 
+                                                              mock_centauri, mock_client_factory, mock_site_op):
+        """Test that InvalidArgumentValueError is raised for invalid setting formats"""
+        cmd_mock = _get_test_cmd()
+
+        # Setup mocks
+        mock_app_settings = mock.MagicMock()
+        mock_app_settings.properties = {}
+        mock_site_op.return_value = mock_app_settings
+
+        mock_client = mock.MagicMock()
+        mock_client_factory.return_value = mock_client
+        mock_centauri.return_value = False
+        mock_settings_op.return_value = mock_app_settings
+        mock_build.return_value = {"success": True}
+
+        # Mock shell_safe_json_parse to raise InvalidArgumentValueError (simulating invalid JSON)
+        mock_json_parse.side_effect = InvalidArgumentValueError("Invalid JSON format")
+
+        # Test invalid format that can't be parsed as JSON or key=value
+        invalid_setting = "invalid_format_no_equals_no_json"
+
+        with self.assertRaisesRegex(InvalidArgumentValueError, 
+                                   r"Invalid setting format.*Expected 'key=value' format or valid JSON"):
+            update_app_settings(cmd_mock, 'test-rg', 'test-app', settings=[invalid_setting])
+
+    @mock.patch('azure.cli.command_modules.appservice.custom._generic_site_operation')
+    @mock.patch('azure.cli.command_modules.appservice.custom.web_client_factory')
+    @mock.patch('azure.cli.command_modules.appservice.custom.is_centauri_functionapp')
+    @mock.patch('azure.cli.command_modules.appservice.custom._generic_settings_operation')
+    @mock.patch('azure.cli.command_modules.appservice.custom._build_app_settings_output')
+    @mock.patch('azure.cli.command_modules.appservice.custom.shell_safe_json_parse')
+    def test_update_app_settings_error_handling_invalid_format_no_equals(self, mock_json_parse, mock_build, mock_settings_op,
+                                                                        mock_centauri, mock_client_factory, mock_site_op):
+        """Test ValueError path when shell_safe_json_parse raises InvalidArgumentValueError and string contains no '='"""
+        cmd_mock = _get_test_cmd()
+
+        # Setup mocks
+        mock_app_settings = mock.MagicMock()
+        mock_app_settings.properties = {}
+        mock_site_op.return_value = mock_app_settings
+
+        mock_client = mock.MagicMock()
+        mock_client_factory.return_value = mock_client
+        mock_centauri.return_value = False
+        mock_settings_op.return_value = mock_app_settings
+        mock_build.return_value = {"success": True}
+
+        # Mock shell_safe_json_parse to raise InvalidArgumentValueError
+        mock_json_parse.side_effect = InvalidArgumentValueError("Invalid JSON format")
+
+        # Test invalid format with no equals sign - this should trigger ValueError in split('=', 1)
+        invalid_setting_no_equals = "invalidformatthatcontainsnoequalsign"
+
+        with self.assertRaisesRegex(InvalidArgumentValueError, 
+                                   r"Invalid setting format.*Expected 'key=value' format or valid JSON"):
+            update_app_settings(cmd_mock, 'test-rg', 'test-app', settings=[invalid_setting_no_equals])
+
+    @mock.patch('azure.cli.command_modules.appservice.custom._generic_site_operation')
+    @mock.patch('azure.cli.command_modules.appservice.custom.web_client_factory')
+    @mock.patch('azure.cli.command_modules.appservice.custom.is_centauri_functionapp')
+    @mock.patch('azure.cli.command_modules.appservice.custom._generic_settings_operation')
+    @mock.patch('azure.cli.command_modules.appservice.custom._build_app_settings_output')
+    def test_update_app_settings_success_key_value_format(self, mock_build, mock_settings_op, mock_centauri, 
+                                                         mock_client_factory, mock_site_op):
+        """Test successful processing of key=value format settings"""
+        cmd_mock = _get_test_cmd()
+
+        # Setup mocks
+        mock_app_settings = mock.MagicMock()
+        mock_app_settings.properties = {}
+        mock_site_op.return_value = mock_app_settings
+
+        mock_client = mock.MagicMock()
+        mock_client_factory.return_value = mock_client
+        mock_centauri.return_value = False
+        mock_settings_op.return_value = mock_app_settings
+        mock_build.return_value = {"KEY1": "value1", "KEY2": "value2"}
+
+        # Test valid key=value format
+        result = update_app_settings(cmd_mock, 'test-rg', 'test-app', 
+                                   settings=['KEY1=value1', 'KEY2=value2'])
+
+        # Verify the function completed successfully
+        self.assertEqual(result["KEY1"], "value1")
+        self.assertEqual(result["KEY2"], "value2")
+        mock_build.assert_called_once()
+
+    @mock.patch('azure.cli.command_modules.appservice.custom.send_raw_request')
+    def test_update_application_settings_polling_error_handling(self, mock_send_request):
+        """Test that AzureResponseError is raised in polling function when appropriate"""
+        cmd_mock = _get_test_cmd()
+
+        # Mock an exception that doesn't have the expected structure
+        class MockException(Exception):
+            def __init__(self):
+                self.response = mock.MagicMock()
+                self.response.status_code = 400  # Not 202
+                self.response.headers = {}
+
+        # Mock _generic_settings_operation to raise the exception
+        with mock.patch('azure.cli.command_modules.appservice.custom._generic_settings_operation') as mock_settings_op:
+            mock_settings_op.side_effect = MockException()
+
+            with self.assertRaisesRegex(AzureResponseError, "Failed to update application settings"):
+                update_application_settings_polling(cmd_mock, 'test-rg', 'test-app', 
+                                                   mock.MagicMock(), None, mock.MagicMock())
+
+    @mock.patch('azure.cli.command_modules.appservice.custom._generic_site_operation')
+    @mock.patch('azure.cli.command_modules.appservice.custom.web_client_factory')
+    @mock.patch('azure.cli.command_modules.appservice.custom.is_centauri_functionapp')
+    @mock.patch('azure.cli.command_modules.appservice.custom._generic_settings_operation')
+    @mock.patch('azure.cli.command_modules.appservice.custom._build_app_settings_output')
+    def test_update_app_settings_success_with_slot_settings(self, mock_build, mock_settings_op, mock_centauri,
+                                                           mock_client_factory, mock_site_op):
+        """Test successful processing with slot settings"""
+        cmd_mock = _get_test_cmd()
+
+        # Setup mocks
+        mock_app_settings = mock.MagicMock()
+        mock_app_settings.properties = {}
+        mock_site_op.return_value = mock_app_settings
+
+        mock_client = mock.MagicMock()
+        mock_slot_config = mock.MagicMock()
+        mock_slot_config.app_setting_names = []
+        mock_client.web_apps.list_slot_configuration_names.return_value = mock_slot_config
+        mock_client_factory.return_value = mock_client
+        mock_centauri.return_value = False
+        mock_settings_op.return_value = mock_app_settings
+        mock_build.return_value = {"SLOT_KEY": "slot_value"}
+
+        # Test with slot settings
+        result = update_app_settings(cmd_mock, 'test-rg', 'test-app', 
+                                   settings=['REGULAR_KEY=regular_value'],
+                                   slot_settings=['SLOT_KEY=slot_value'])
+
+        # Verify slot configuration was updated
+        mock_client.web_apps.list_slot_configuration_names.assert_called_once()
+        mock_client.web_apps.update_slot_configuration_names.assert_called_once()
+        mock_build.assert_called_once()
+
+
 class FakedResponse:  # pylint: disable=too-few-public-methods
     def __init__(self, status_code):
         self.status_code = status_code