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SpaceVim/docs/layers/language-server-protocol.md
2017-12-23 15:34:37 +08:00

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---
title: "SpaceVim language server protocol layer"
description: "This layers provides language server protocol for vim and neovim"
---
# [SpaceVim Layers:](https://spacevim.org/layers) lsp
<!-- vim-markdown-toc GFM -->
- [Description](#description)
- [Features](#features)
- [Install](#install)
- [Configuration](#configuration)
- [Key bindings](#key-bindings)
<!-- vim-markdown-toc -->
## Description
This layers adds extensive support for [language-server-protocol](https://microsoft.github.io/language-server-protocol/), This layer is a heavy wallpaper of [LanguageClient-neovim](https://github.com/SpaceVim/LanguageClient-neovim) (an old fork), The upstream is rewritten by rust.
we also want to include [vim-lsp](https://github.com/prabirshrestha/vim-lsp), which is wrote in pure vim script.
the neovim team is going to implement the build-in LSP support, the PR is [neovim#6856](https://github.com/neovim/neovim/pull/6856). and the author of this PR create another plugin [tjdevries/nvim-langserver-shim](https://github.com/tjdevries/nvim-langserver-shim)
SpaceVim should works well in different version of vim/neovim, so in the features, the logic of this layer should be:
```vim
if has('nvim')
" use neovim build-in lsp
elseif has('python3')
" use LanguageClient-neovim
else
" use vim-lsp
endif
```
## Features
- Asynchronous calls
- Code completion (provided by [autocomplet](https://spacevim.org/layers/autocomplete/) layer)
- Lint on the fly
- Rename symbol
- Hover/Get identifer info.
- Goto definition.
- Goto reference locations.
- Workspace/Document symbols query.
- Formatting.
- Code Action/Fix.
**Note:** All these features dependent on the implementation of the language server, please check the list of [Language Servers](https://microsoft.github.io/language-server-protocol/implementors/servers/)
## Install
To use this configuration layer, add `call SpaceVim#layers#load('lsp')` to your custom configuration file.
## Configuration
To enable lsp support for a specified filetype, you may need to load this layer with `filtypes` option, for example:
```vim
call SpaceVim#layers#load('lsp',
\ {
\ 'filetypes' : ['rust',
\ 'typescript',
\ 'javascript',
\ ],
\ }
```
default language server commands:
| language | server command |
| ------------ | --------------------------------- |
| `javascript` | `['javascript-typescript-stdio']` |
| `haskell` | `['hie', '--lsp']` |
To override the server command, you may need to use `override_cmd` option:
```vim
call SpaceVim#layers#load('lsp',
\ {
\ 'override_cmd' : {
\ 'rust' : ['rustup', 'run', 'nightly', 'rls'],
\ }
\ }
```
## Key bindings
| Key Binding | Description |
| --------------- | ------------- |
| `K` / `SPC l d` | show document |
| `SPC l e` | rename symbol |