Lsp-mode: Support for Ember Language Server

[ryanolsonx]

There is an Ember Language Service that gives LSP functionality for Ember.js JavaScript projects. There is an extension for VS Code and a package for Atom that hook in.

Is it possible that we'd be able to get this into lsp-mode?

[yyoncho]

I have had an offline discussion with @madnificent a few months ago about the same and back then the following configuration used to work but never make it to lsp-mode.

(lsp-register-client
 (make-lsp-client :new-connection (lsp-stdio-connection (list "node" "/home/kyoncho/Sources/ember-language-server/lib/start-server.js" "--stdio"))
                  :major-modes '(js2-mode)
                  :priority -1
                  :ignore-messages (list "Initializing Ember Language Server at .*$")
                  :add-on? t
                  :server-id 'ember-ls))

@ryanolsonx it would be great if you can test it and eventually provide a PR (similar to what we did for Angular - https://github.com/emacs-lsp/lsp-mode/commit/e36409eecb900e20fc5364b9f94c1bda603d1a8a )

[madnificent]

@yyoncho I should be able to test this on a brand new machine in the coming week in combination with Docker. If the combination does not work as expected, I can also try a native installation.

@ryanolsonx I'm now on lifeart/component-context-info in which I had to replace three console.log statements.