Try to launch ENSIME server

laughedelic commented 6 years ago

See https://github.com/laughedelic/atom-ide-scala/issues/1#issuecomment-343320728.

Related issue: https://github.com/dragos/dragos-vscode-scala/issues/72
Relevant code: https://github.com/dragos/dragos-vscode-scala/blob/41939453d8efa2ee020bc37236d04fc2b4f7d553/scala/src/extension.ts#L52-L66

laughedelic commented 6 years ago

This launches the ENSIME server, but I don't see anything working in the editor. It loads the processor, I see requests sent and log messages, but don't get any responses.. ☹️

laughedelic commented 6 years ago

I switched to the official ENSIME LSP server, it got recently merged in the 3.0 branch of the ensime-server: https://github.com/ensime/ensime-server/pull/1888 and is a replacement for the dragos' server implementation.

Here's what I got so far:

the server launches well with coursier
but it doesn't shutdown properly and you need to kill the process (see here). It leads to several problems:
- newly launched server may fail on trying to access locked cache
- even when you kill the zombie, new server may fail to launch (details on demand)
if it launches well and is running, these things work:
- textDocument/documentSymbol shows some symbols, but the hierarchy is broken
- textDocument/definition works quite well and even jumps to the stuff from the project deps
- textDocument/hover works, but has some glitches (like empty tooltips of showing nonsense when hovering on comments)
- textDocument/completion seems to work ✨ but breaks once the code doesn't compile and doesn't restore if you fix it all of them have problems that have to be fixed in the server, but it's not critical now
presentation compiler throws lots of false positives and things like Presentation compiler crashed while type checking this file, but this is probably due to that I didn't set the classpath properly..

laughedelic commented 6 years ago

I'm going to merge this as a first step towards ENSIME server support. ENSIME LSP is in improvement process: https://github.com/ensime/ensime-server/pull/1894.

Next step will be #13.

laughedelic / atom-ide-scala

Try to launch ENSIME server #3