Watch for changed files

[fhs]

When files are changed outside of acme (e.g. git branch change), gopls currently doesn't update its cache. We should implement workspace/didChangeWatchedFiles when gopls supports it (issue https://github.com/golang/go/issues/31553).

We may want to have a temporary workaround for gopls. Perhaps just watch for all matching (.go) files in the workspaces?

[ilanpillemer]

I just ran into this issue. Is the only solution to restart gopls at the moment?

[ilanpillemer]

fyi, I asked on the gopls channel in slack, and apparently file watching is on the roadmap for gopls.

[fhs]

You can execute Get in the window to reload the file in gopls. That usually works if the set of files didn't change, but if you add/remove files, gopls might get so confused that you need to restart it.

[bd339]

From the looks of the issue mentioned, this now works in gopls.