RLS and VSCode plugin don't work with VSCode workspaces

[sophiajt]

New with the latest VSCode Insiders build you can now add multiple projects to the current VSCode instance and create a workspace. You can see this in the first seconds of the video on this tweet:

https://twitter.com/_clarkio/status/905850172072235008

I tried it with the Rust(rls) plugin and noticed that it's not yet able to switch between the projects inside of the workspace correctly.

[Xanewok]

The API is now considered stable, although the VSCode workspaces are still only enabled in the Insiders Build.
This might be helpful: https://github.com/Microsoft/vscode/wiki/Extension-Authoring:-Adopting-Multi-Root-Workspace-APIs

[nrc]

Should there be integration with Cargo workspaces? I.e., if in workspace mode should a VSCode workspace be the whole Cargo project or a single workspace?

[Xanewok]

This is planned as a protocol extension: microsoft/language-server-protocol#298

[parkovski]

As an option that's probably fine, but I have a project that's a Unity game with a Rust server - I don't want Rust to try to take over the whole VSCode workspace, so I think it should at least support Cargo workspaces as a single workspace folder for those kinds of scenarios.

[nrc]

Fixed.