Notebook File Root setting does not work with Remote Kernels

[jiahao-shen]

Environment data

• VS Code version: 1.63.2
• Jupyter Extension version: v2021.11.1001550889
• Python Extension version: v2021.12.1559732655
• OS (Windows | Mac | Linux distro) and version: MacOS
• Python and/or Anaconda version: 3.7.3
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): conda
• Jupyter server running: Remote

Describe

When i use remote kernel in vscode-jupyter, it cannot use the relative path, the Notebook File Root is not work for ${fileDirname}

[amunger]

Can you provide more details about what behavior you are experiencing vs what you expect?
If you run a cell with the following, do you get the location of the notebook that you're currently running?

import os
print(os.getcwd())

[jiahao-shen]

I run the remote kernel by using command line jupyter notebook and set the remote kernel in vscode according to the uri.
I run the same code in browser and vscode, and this is the different results.

[amunger]

OK, I can repro. It looks like ${filenameDir} is returning the location of the remote kernel, rather than the location of the notebook.

[greazer]

There's a minor thing we can do here for remote running on localhost. Since we know the directory is probably accessible on the localhost we could special case the situation.

If the remote is truly remote, it's a more complex problem to deal with.