Force refresh modules JSON when --update is passed

lean/click.py

@@ -274,6 +274,9 @@ def invoke(self, ctx: Context):
         update_manager = container.update_manager
         update_manager.show_announcements()
 
+        if ctx.params.get("update", False):
+            update_manager.force_refresh_modules_json()
+
         result = super().invoke(ctx)
 
         update_manager.warn_if_cli_outdated()

lean/components/util/update_manager.py

@@ -162,6 +162,23 @@ def show_announcements(self) -> None:
 
         self._logger.info(Panel.fit(table, title="Announcements", box=box.SQUARE))
 
+    def force_refresh_modules_json(self) -> None:
+        """Forces a re-download of the modules JSON file, bypassing the 24-hour cache interval."""
+        from lean.models import url as modules_url, file_path as modules_file_path
+        from requests import get
+        try:
+            res = get(modules_url, timeout=5)
+            if res.ok:
+                from json import dump
+                modules_file_path.parent.mkdir(parents=True, exist_ok=True)
+                with open(modules_file_path, 'w', encoding='utf-8') as f:
+                    dump(res.json(), f, ensure_ascii=False, indent=4)
+            else:
+                res.raise_for_status()
+        except Exception:
+            # No need to do anything if file isn't available
+            pass
+
     def _should_check_for_updates(self, key: str, interval_hours: int) -> bool:
         """Returns whether an update check should be performed.
 

tests/components/util/test_update_manager.py

@@ -277,6 +277,31 @@ def test_show_announcements_does_nothing_when_latest_announcements_shown_before(
     logger.info.assert_not_called()
 
 
+def test_force_refresh_modules_json_downloads_file(requests_mock: RequestsMock) -> None:
+    from lean.models import url as modules_url, file_path as modules_file_path
+    modules_json = {"modules": {"SomeModule": {"version": "1.0"}}}
+    requests_mock.add(requests_mock.GET, modules_url, json=modules_json)
+
+    logger, storage, docker_manager, update_manager = create_objects()
+
+    update_manager.force_refresh_modules_json()
+
+    assert modules_file_path.is_file()
+    with open(modules_file_path) as f:
+        assert json.load(f) == modules_json
+
+
+def test_force_refresh_modules_json_does_nothing_when_offline(requests_mock: RequestsMock) -> None:
+    from lean.models import url as modules_url
+    from requests.exceptions import ConnectionError as RequestsConnectionError
+    requests_mock.add(requests_mock.GET, modules_url, body=RequestsConnectionError())
+
+    logger, storage, docker_manager, update_manager = create_objects()
+
+    # Should not raise
+    update_manager.force_refresh_modules_json()
+
+
 def test_show_announcements_does_nothing_when_there_are_no_announcements(requests_mock: RequestsMock) -> None:
     requests_mock.add(requests_mock.GET,
                       "https://raw.githubusercontent.com/QuantConnect/lean-cli/master/announcements.json",