{testsdk} Copy command index to random config dir (#28853)

.azure-pipelines/templates/azdev_setup.yml

@@ -31,6 +31,9 @@ steps:
       if [ "${{ parameters.EnableCompactAAZ }}" == 'True' ]; then
         python $CLI_REPO_PATH/scripts/compact_aaz.py
       fi
+
+      # Verify installation and build command index
+      az --version
     displayName: 'azdev setup'
     env:
       CLI_REPO_PATH: ${{ parameters.CLIRepoPath }}

src/azure-cli-core/azure/cli/core/mock.py

@@ -32,17 +32,23 @@ class DummyCli(AzCli):
             self.env_patch = patch.dict(os.environ, {'AZURE_CONFIG_DIR': config_dir})
             self.env_patch.start()
 
+            # Always copy command index to avoid initializing it again
+            files_to_copy = ['commandIndex.json']
             # In recording mode, copy login credentials from global config dir to the dummy config dir
             if os.getenv(ENV_VAR_TEST_LIVE, '').lower() == 'true':
-                if os.path.exists(GLOBAL_CONFIG_DIR):
-                    ensure_dir(config_dir)
-                    import shutil
-                    for file in ['azureProfile.json', 'msal_token_cache.bin', 'clouds.config', 'msal_token_cache.json',
-                                 'service_principal_entries.json']:
-                        try:
-                            shutil.copy(os.path.join(GLOBAL_CONFIG_DIR, file), config_dir)
-                        except FileNotFoundError:
-                            pass
+                files_to_copy.extend([
+                    'azureProfile.json', 'clouds.config',
+                    'msal_token_cache.bin', 'msal_token_cache.json',
+                    'service_principal_entries.bin', 'service_principal_entries.json'
+                ])
+
+            ensure_dir(config_dir)
+            import shutil
+            for file in files_to_copy:
+                try:
+                    shutil.copy(os.path.join(GLOBAL_CONFIG_DIR, file), config_dir)
+                except FileNotFoundError:
+                    pass
 
         super(DummyCli, self).__init__(
             cli_name='az',