PYTHONPATH in .env file ignored with pyright extraPaths config

[propertone]

Environment data

• Language Server version: 2022.1.1
• OS and version: Linux RedHat 7
• Python version: 3.9.7

Issue

This is a follow-up to #2195 - we want to merge the project's and user's extraPath setting. To do that, we have the extraPath variable specified inside a pyproject.toml file using:

[tool.pyright]
extraPaths = ["src/python"]

I also have a per-user PYTHONPATH specified inside a .env file like:

PYTHONPATH=/path/to/additional/libs

I expect that the paths in pyproject.toml and .env file will get merged, but the PYTHONPATH from the .env file is completely ignored instead. Using pyrightconfig.json has the same behavior. Merging the paths works if the extraPaths is specified ONLY in the vscode setting's python.analysis.extraPaths property (and NOT in the pyproject.toml/pyrightconfig.json file). However we prefer to not use this approach because: 1) Other pyright configurations like include are only supported in the pyright configuration file and keeping all pyright configurations in one place is more convenient, and 2) we prefer not to commit the vscode setting file to Git as some user actions unknowingly end up modifying the project's .vscode/settings.json file which causes conflicts.

[judej]

Thanks for the report. Will look at how this should work

[heejaechang]

we need to do expanding env:PYTHONPATH in other configurations as well.

see https://github.com/microsoft/pyrx/pull/852 and microsoft/vscode-python#15107

[judej]

Moving this issue to discussion as an enhancement request for comments and upvotes.