Defaults are kill server after 12 hours of inactivity; the reason why it's 12
hours and not less is because we don't want to kill the server when the user
just left his machine (and Vim) on during the night.
If we install an explicit signal handler for SIGTERM and SIGINT and then call
sys.exit ourselves, atexit handlers are run. If we don't call sys.exit from the
handler, ycmd never shuts down. So fixed... I think. We'll see.
Fixes #577... again.
atexit won't run registered functions for SIGTERM which we send to the server.
This prevents clean shutdown.
Also making sure that the server logfiles are deleted as well.
Previously the YCM Vim client would go bonkers when ycmd crashed. Now the user
can continue using Vim just without YCM functionality.
Also added a :YcmRestartServer command to let the user restart ycmd if it
crashed. With a little luck, this will be rarely necessary.
This means we can now load just ycm_client_support (which is a much smaller
library) into Vim and ycm_core into ycmd. Since ycm_client_support never depends
on libclang.so, we never have to load that into Vim which makes things much,
much easier.
This changes functionality, but since this is an undocumented, non-public API,
it's fine. The reason this is required is because of issue #579; if we try to
run extra conf preload on non-global extra conf, we might not have the
permission to load it. The global extra conf is something the user explicitly
has to set so it's always fine to load that.
Now, every FileReadyToParse event returns diagnostics, if any. This is instead
of the previous system where the diagnostics were being fetched in a different
request (this caused race conditions).
There appear to be timing issues for the diag requests. Somehow, we're sending
out-of-date diagnostics and then not updating the UI when things change.
That needs to be fixed.
The server is multi-threaded and will spawn a new thread for each new request.
Thus, the completers need not manage their own threads or even provide async
APIs; we _want_ them to block because now were implementing the request-response
networking API.
The client gets the async API through the network (i.e., it can do something
else while the request is pending).
