separate language server to standalone directory , avoid re-download it when extension auto update

[luliangce]

I notice that when python extension update, a new extension directory like ~/.vscode-server/extensions/ms-python.python-2020.5.80290 will be set up.
then i have to re-download the same version of language server because the old one was deleted by this update.
it's not easy, because I am in China mainland. I have to wait for some miniutes with less than 10 kb/s network.
is there any possible to avoid this unnecessary download ?

[karthiknadig]

/cc @jakebailey @judej

[jakebailey]

This is purely an extension issue; the fix would be to store the downloaded code in the extension's global storage area rather than its folder. This is a bit more complicated as there would need to be logic to remove old versions (as the folder stays forever).

[karthiknadig]

Moved it to LS repo since the LS integration with the extension is owned by the LS team.

[jakebailey]

Going to leave this open for a bit, will talk w/ PMs to see if we want to do this.