Failed to start language server: "Could not find command 'socket'."

[athrunsun]

• OS: Linux Mint 18.3
• Desktop: Cinnamon
• VSCode version: 1.23.1
• ruby version: 2.4.2p198 (2017-09-14 revision 59899) [x86_64-linux]
• solargraph version: 0.17.3
• ruby & solargraph related configurations in VSCode:

  "ruby.interpreter.commandPath": "/home/xxx/.rbenv/shims/ruby",
  "ruby.pathToBundler": "/home/xxx/.rbenv/shims/bundle",
  "solargraph.commandPath": "/home/xxx/.rbenv/shims/solargraph",
  "solargraph.bundlerPath": "/home/xxx/.rbenv/shims/bundle",

Error message:

[Extension Host] Failed to start language server: "Could not find command \"socket\".\n"    /usr/share/code/resources/app/out/vs/workbench/workbench.main.js:263

Screenshot:

What is socket refering to here?

I got no error when I manually start language server with solargraph server on the command line.

[castwide]

The latest versions of the gem and extension use the language server protocol over a socket transport instead of the old web server. I recommend upgrading to gem version 0.22.0.

[athrunsun]

@castwide Thanks for the suggestion, I upgraded solargraph gem and it works.

BTW, do I have to specify absolute path for ruby & solargraph related configurations, like /home/xxx/.rbenv/shims/ruby? I tried ~/.rbenv/shims/ruby and $HOME/.rbenv/shims/ruby but neither of them works.

[castwide]

Yes, it should typically be an absolute path if you need to specify it.

[athrunsun]

@castwide OK, got it.