GetInterpreterDetails no longer returning sys.prefix

[DonJayamanne]

Environment data

• VS Code version: Insiders
• Extension version (available under the Extensions sidebar): 2021.6.894226714-dev
• OS and version: Mac
• Python version (& distribution if applicable, e.g. Anaconda): 3.8
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): Virtual Env
• Relevant/affected Python packages and their versions: n/a
• Relevant/affected Python-related VS Code extensions and their versions: n/a
• Value of the python.languageServer setting: n/a

[NOTE: If you suspect that your issue is related to the Microsoft Python Language Server (python.languageServer: 'Microsoft'), please download our new language server Pylance from the VS Code marketplace to see if that fixes your issue]

Experiments

User belongs to experiment group 'pythonaacf'
User belongs to experiment group 'pythonJediLSP'
User belongs to experiment group 'pythonDiscoveryModuleWithoutWatcher'
User belongs to experiment group 'pythonTensorboardExperiment'
User belongs to experiment group 'PythonPyTorchProfiler'
User belongs to experiment group 'CollectLSRequestTiming - control'
User belongs to experiment group 'CollectNodeLSRequestTiming - experiment'

The API used by Jupyter extension ends up with sys.prefix being empty.

[DonJayamanne]

@karthiknadig /cc

[karthiknadig]

@karrtikr This seems to be an issue with caching. essentially doResolveEnv in CachingLocator gets entries from cache if it can find a match. The problem is that when the cache is loaded the first time it might not have executed the interpreter info script. So the cache content might actually be incomplete, since we pulled from cache, we do not run resolve on that environment or attempt to see if it needs to be refreshed.

As we had discussed offline, we need a better way to determine if the cache information is outdated or incomplete. In those cases we should continue to run full resolution.

We can provide a short-term solution here while we address the issues with caching locator.