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vim-lsp

Async Language Server Protocol plugin for vim8 and neovim.

Installing

Plug 'prabirshrestha/async.vim'
Plug 'prabirshrestha/vim-lsp'

Note: async.vim is required and is used to normalize jobs between vim8 and neovim.

Registering servers

For other languages please refer to the wiki.

if executable('pyls')
    " pip install python-language-server
    au User lsp_setup call lsp#register_server({
        \ 'name': 'pyls',
        \ 'cmd': {server_info->['pyls']},
        \ 'whitelist': ['python'],
        \ })
endif

While most of the time it is ok to just set the name, cmd and whitelist there are times when you need to get more control of the root_uri. By default root_uri for the buffer can be found using lsp#utils#get_default_root_uri() which internaly uses getcwd(). Here is an example that sets the root_uri to the directory where it contains tsconfig.json and traverses up the directories automatically, if it isn't found it returns empty string which tells vim-lsp to start the server but don't initialize the server. If you would like to avoid starting the server you can return empty array for cmd.

if executable('typescript-language-server')
    au User lsp_setup call lsp#register_server({
        \ 'name': 'typescript-language-server',
        \ 'cmd': {server_info->[&shell, &shellcmdflag, 'typescript-language-server', '--stdio']},
        \ 'root_uri':{server_info->lsp#utils#path_to_uri(lsp#utils#find_nearest_parent_file_directory(lsp#utils#get_buffer_path(), 'tsconfig.json'))},
        \ 'whitelist': ['typescript'],
        \ })
endif

auto-complete

vim-lsp by default only provides basic omnifunc support for autocomplete. Completion can be made asynchronous by setting g:lsp_async_completion. Note that this may cause unexpected behavior in some plugins such as MUcomplete.

If you would like to have more advanced features please use asyncomplete.vim as described below.

omnifunc

" let g:lsp_async_completion = 1

autocmd FileType typescript setlocal omnifunc=lsp#complete

asyncomplete.vim

asyncomplete.vim is a async auto complete plugin for vim8 and neovim written in pure vim script without any python dependencies.

Plug 'prabirshrestha/asyncomplete.vim'
Plug 'prabirshrestha/asyncomplete-lsp.vim'

Supported commands

Note:

  • Some servers may only support partial commands.
  • While it is possible to register multiple servers for the same filetype, some commands will pick only pick the first server that supports it. For example, it doesn't make sense for rename and format commands to be sent to multiple servers.
Command Description
:LspDocumentDiagnostics Get current document diagnostics information
:LspDefinition Go to definition
:LspDocumentFormat Format entire document
:LspDocumentRangeFormat Format document selection
:LspDocumentSymbol Show document symbols
:LspHover Show hover information
:LspReferences Find references
:LspRename Rename symbol
:LspWorkspaceSymbol Search/Show workspace symbol

Debugging

In order to enable file logging set g:lsp_log_file.

let g:lsp_log_verbose = 1
let g:lsp_log_file = expand('~/vim-lsp.log')

" for asyncomplete.vim log
let g:asyncomplete_log_file = expand('~/asyncomplete.log')

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async language server protocol plugin for vim and neovim

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