how to make rust-analyzer use the pipenv environment, and prefix its commands with env variable: LIBTORCH_USE_PYTORCH=1

[DeaDSouL]

Hello,

I use VSCode with Rust-Analyzer, for my work with rust. And I needed the libtorch package, but since my OS (Fedora) doesn't provide one with its repositories. I've created a virtual python environment in my rust project folder (via: pipenv install torch==2.2.0).
Now, in order to activate that environment I need to run pipenv shell.
Then I can run the following: LIBTORCH_USE_PYTORCH=1 cargo run and it works just fine.
I can also run a command inside that virtual environment without entering it via: pipenv run the-command.

so, I've configured my vscode terminal to use that environment, by configuring the python.defaultInterpreterPath in vscode.

now my problem is, how to tell rust-analyzer to use that environment, and prefix all its commands with this env variable LIBTORCH_USE_PYTORCH=1 ?

I tried all its configurations, but no luck.

Thanks

[lnicola]

You can start Code in pipenv shell or set rust-analyzer.server.extraEnv in the extension settings (example).

[DeaDSouL]

I tried this:

{
..
  "rust-analyzer.runnables.command": "LIBTORCH_USE_PYTORCH=1 /home/deadsoul/.local/bin/pipenv run cargo",
  "rust-analyzer.server.extraEnv": {"LIBTORCH_USE_PYTORCH": "1"},
..
}

no luck!

[lnicola]

Yeah, for runnables you might have to run Code inside pipenv. I suspect having the environment variable set isn't enough, you also want PATH, PYTHONPATH or whatever.

[DeaDSouL]

Never mind,
I tried running Code inside pipenv and it worked. I'll mark your first reply as the solution
Thanks

[lnicola]

Yeah, extraEnv can be useful if your code needs some environment variables for a build script, but nothing more fancy.