[App Service] az functionapp deployment source config-zip: Fix KeyError 'FUNCTIONS_WORKER_RUNTIME' for Go on Flex Consumption

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

@@ -7768,7 +7768,7 @@ def _parse_raw_stacks(self, stacks):
                         continue
 
                     runtime_settings = minor_version['stackSettings']['linuxRuntimeSettings']
-                    runtime_name = (runtime_settings['appSettingsDictionary']['FUNCTIONS_WORKER_RUNTIME'] or
+                    runtime_name = (runtime_settings.get('appSettingsDictionary', {}).get('FUNCTIONS_WORKER_RUNTIME') or
                                     runtime['name'])
 
                     skus = runtime_settings['Sku']

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

@@ -681,3 +681,62 @@ def test_config_source_control(self,
 
         # assert
         self.assertEqual(response.git_hub_action_configuration.container_configuration.password, None)
+
+    def test_flex_parse_raw_stacks_handles_empty_app_settings_dictionary(self):
+        from azure.cli.command_modules.appservice.custom import _FlexFunctionAppStackRuntimeHelper
+
+        # prepare
+        cmd_mock = _get_test_cmd()
+        go_stack = {
+            'name': 'go',
+            'properties': {'majorVersions': [{'minorVersions': [{
+                'value': '1.0',
+                'stackSettings': {'linuxRuntimeSettings': {
+                    'appSettingsDictionary': {},
+                    'Sku': [{'skuCode': 'FC1'}],
+                    'gitHubActionSettings': {'isSupported': True},
+                    'appInsightsSettings': {'isSupported': True},
+                    'isDefault': True,
+                }},
+            }]}]},
+        }
+
+        # action
+        with mock.patch.object(_FlexFunctionAppStackRuntimeHelper,
+                               'get_flex_raw_function_app_stacks',
+                               return_value=[go_stack]):
+            matched = _FlexFunctionAppStackRuntimeHelper(cmd_mock, 'westcentralus', 'go').resolve('go', '1.0')
+
+        # assert
+        self.assertEqual(matched.name, 'go')
+        self.assertEqual(matched.version, '1.0')
+
+    def test_flex_parse_raw_stacks_prefers_functions_worker_runtime_when_present(self):
+        # FUNCTIONS_WORKER_RUNTIME overrides runtime['name'] when set (e.g., dotnet-isolated under the dotnet stack).
+        from azure.cli.command_modules.appservice.custom import _FlexFunctionAppStackRuntimeHelper
+
+        # prepare
+        cmd_mock = _get_test_cmd()
+        dotnet_isolated_stack = {
+            'name': 'dotnet',
+            'properties': {'majorVersions': [{'minorVersions': [{
+                'value': '8.0',
+                'stackSettings': {'linuxRuntimeSettings': {
+                    'appSettingsDictionary': {'FUNCTIONS_WORKER_RUNTIME': 'dotnet-isolated'},
+                    'Sku': [{'skuCode': 'FC1'}],
+                    'gitHubActionSettings': {'isSupported': True},
+                    'appInsightsSettings': {'isSupported': True},
+                    'isDefault': True,
+                }},
+            }]}]},
+        }
+
+        # action
+        with mock.patch.object(_FlexFunctionAppStackRuntimeHelper,
+                               'get_flex_raw_function_app_stacks',
+                               return_value=[dotnet_isolated_stack]):
+            matched = _FlexFunctionAppStackRuntimeHelper(
+                cmd_mock, 'westcentralus', 'dotnet-isolated').resolve('dotnet-isolated', '8.0')
+
+        # assert
+        self.assertEqual(matched.name, 'dotnet-isolated')