vscode extension relentlessly generating .metals folder, when it probably shouldn't

[dj-mc]

The vscode extension is generating a .metals folder with a metals.lock.db file, but it's doing this in projects that have nothing to do with Scala. e.g. a workspace with nothing but a .cxx source file. It sometimes does this after I click on the extension icon. If I delete the folder it's regenerated instantly.

Sometimes this happens and sometimes it doesn't. Restarting vscode is a temporary fix, but I would like to know what's happening and can I prevent it?

[tgodzik]

This is most likely caused by VS Code timing out and enabling the Metals extension by default.

The condition that times out is https://github.com/scalameta/metals-vscode/blob/main/package.json#L53 and it's problem with VS Code, which I don't believe should activate extensions in case of timeout.

You should see the exact reason, why Metals was activated in Output view after choosing log (extension host)