An implementation of the Language Server Protocol written in Crystal.
This shard is a partial implementation of the Language Server Protocol. It contains json mappings to the data structures and messages as well as a fully working server implementation.
The code has originally been written for the crystalline tool and is now extracted here.
Add the dependency to your
dependencies: lsp: github: elbywan/crystal-lsp
require "lsp/server" # Declare the server capabilities # See: https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#capabilities server_capabilities = LSP::ServerCapabilities.new( # ... ) # STDIN and STDOUT are used by default, but you can pass any IO. server = LSP::Server.new(STDIN, STDOUT, server_capabilities) # A Controller is a class or struct that responds to client events. # Example: https://github.com/elbywan/crystalline/blob/master/src/crystalline/controller.cr server.start(Controller.new) struct Controller # Called just after receiving the "initialize" request def on_init(init_params : LSP::InitializeParams) : Nil # … end # Called after the handshake is complete and before listening for requests and notifications def when_ready : Nil # … end # Called when the client sends a request (https://microsoft.github.io/language-server-protocol/specifications/specification-3-16/#requestMessage) def on_request(message : LSP::RequestMessage) # … end # Called when the client sends a notification (https://microsoft.github.io/language-server-protocol/specifications/specification-3-16/#notificationMessage) def on_notification(message : LSP::NotificationMessage) : Nil # … end # Called when the client sends a response (https://microsoft.github.io/language-server-protocol/specifications/specification-3-16/#responseMessage) def on_response(message : LSP::ResponseMessage, original_message : LSP::RequestMessage?) : Nil # … end end
- Fork it (https://github.com/elbywan/lsp/fork)
- Create your feature branch (
git checkout -b my-new-feature)
- Commit your changes (
git commit -am 'Add some feature')
- Push to the branch (
git push origin my-new-feature)
- Create a new Pull Request
- Julien Elbaz - creator and maintainer