support "workspace/didChangeWatchedFiles"

[ayoub-benali]

At least Metals LSP server would need such a feature, see scalameta/metals#533

Any idea on how such a feature would be implemented given the sublime API ?

[rwols]

This is impossible with the current ST3 api.

[olafurpg]

FWIW, Metals has its own file watcher for critical functionality but due to API limitations we delegate workspace/didChangeWatchedFiles notifications to the editor client for nice-to-have but non-essential features like detecting build changes by background processes.

[tomv564]

Might be practical to write a small Sublime package that hooks workspace/didChangeWatchedFiles from LSP and uses watchman to service that API.

The LanguageHandler API is a bit too specific, this package could do it for any language, so we could expose a new API for hooking in these kind of services.