CM-64462: fix plugin registry file-URI parsing on Windows

url2pathname handles drive-letter file URIs (file:///C:/...) that a bare
urlparse().path mangles with a leading slash; also build the pluginLocations
test fixture with json.dumps so Windows path separators are escaped.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: Ilanlido

cycode/cli/apps/ai_guardrails/ides/copilot.py

@@ -20,7 +20,8 @@
 from collections.abc import Iterable
 from pathlib import Path
 from typing import ClassVar, Optional, Union
-from urllib.parse import unquote, urlparse
+from urllib.parse import urlparse
+from urllib.request import url2pathname
 
 from cycode.cli.apps.ai_guardrails.consts import CYCODE_SCAN_PROMPT_COMMAND, CYCODE_SESSION_START_COMMAND
 from cycode.cli.apps.ai_guardrails.ides._plugin_utils import (
@@ -212,7 +213,8 @@ def _vscode_registry_plugins() -> dict:
         entries[key] = plugin
         uri = plugin.get('pluginUri', '')
         if uri.startswith('file://'):
-            dirs[key] = Path(unquote(urlparse(uri).path))
+            # url2pathname unquotes and handles Windows drive-letter URIs (file:///C:/...).
+            dirs[key] = Path(url2pathname(urlparse(uri).path))
     return _walk_registry_plugins(entries, dirs, is_enabled=False)
 
 

tests/cli/commands/ai_guardrails/ides/test_copilot.py

@@ -380,10 +380,11 @@ def test_local_dir_plugins_from_plugin_locations_setting(fs: FakeFilesystem) ->
     disabled_dir = Path('/plugins/disabled-plugin')
     _create_plugin_on_disk(fs, enabled_dir, manifest_location='plugin.json')
     _create_plugin_on_disk(fs, disabled_dir, manifest_location='plugin.json')
-    locations = f'{{"{enabled_dir}": true, "{disabled_dir}": false}}'
+    # json.dumps escapes Windows path separators; the comment line exercises JSONC handling.
+    settings = json.dumps({'chat.pluginLocations': {str(enabled_dir): True, str(disabled_dir): False}})
     fs.create_file(
         _vscode_mcp_config_path().parent / 'settings.json',
-        contents=f'{{\n// user settings\n"chat.pluginLocations": {locations}\n}}',
+        contents=f'// user settings\n{settings}',
     )
 
     _, plugins = Copilot().get_session_context()