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Vim / Neovim

vim-go

Use vim-go ver 1.20+, with the following configuration:

let g:go_def_mode='gopls'
let g:go_info_mode='gopls'

LanguageClient-neovim

Use LanguageClient-neovim, with the following configuration:

" Launch gopls when Go files are in use
let g:LanguageClient_serverCommands = {
       \ 'go': ['gopls']
       \ }
" Run gofmt on save
autocmd BufWritePre *.go :call LanguageClient#textDocument_formatting_sync()

Ale

Use ale:

let g:ale_linters = {
	\ 'go': ['gopls'],
	\}

see this issue

vim-lsp

Use prabirshrestha/vim-lsp, with the following configuration:

augroup LspGo
  au!
  autocmd User lsp_setup call lsp#register_server({
      \ 'name': 'go-lang',
      \ 'cmd': {server_info->['gopls']},
      \ 'whitelist': ['go'],
      \ })
  autocmd FileType go setlocal omnifunc=lsp#complete
  "autocmd FileType go nmap <buffer> gd <plug>(lsp-definition)
  "autocmd FileType go nmap <buffer> ,n <plug>(lsp-next-error)
  "autocmd FileType go nmap <buffer> ,p <plug>(lsp-previous-error)
augroup END

vim-lsc

Use natebosch/vim-lsc, with the following configuration:

let g:lsc_server_commands = {
\  "go": {
\    "command": "gopls serve",
\    "log_level": -1,
\    "suppress_stderr": v:true,
\  },
\}

The log_level and suppress_stderr parts are needed to prevent breakage from logging. See issues #180 and #213.

coc.nvim

Use coc.nvim, with the following coc-settings.json configuration:

  "languageserver": {
    "golang": {
      "command": "gopls",
      "rootPatterns": ["go.mod", ".vim/", ".git/", ".hg/"],
      "filetypes": ["go"],
      "initializationOptions": {
        "usePlaceholders": true
      }
    }
  }

Other settings can be added in initializationOptions too.

The editor.action.organizeImport code action will auto-format code and add missing imports. To run this automatically on save, add the following line to your init.vim:

autocmd BufWritePre *.go :call CocAction('runCommand', 'editor.action.organizeImport')

govim

In vim classic only, use the experimental govim, simply follow the install steps.

Neovim v0.5.0+

To use the new (still experimental) native LSP client in Neovim, make sure you install the prerelease v0.5.0 version of Neovim (aka “nightly”), the nvim-lspconfig configuration helper plugin, and check the gopls configuration section there.

Custom configuration

You can add custom configuration using Lua. Here is an example of enabling the unusedparams check as well as staticcheck:

lua <<EOF
  nvim_lsp = require "nvim_lsp"
  nvim_lsp.gopls.setup {
    cmd = {"gopls", "serve"},
    settings = {
      gopls = {
        analyses = {
          unusedparams = true,
        },
        staticcheck = true,
      },
    },
  }
EOF

Imports

To get your imports ordered on save, like goimports does, you can define a helper function in Lua:

lua <<EOF
  -- …

  function goimports(timeoutms)
    local context = { source = { organizeImports = true } }
    vim.validate { context = { context, "t", true } }

    local params = vim.lsp.util.make_range_params()
    params.context = context

    local method = "textDocument/codeAction"
    local resp = vim.lsp.buf_request_sync(0, method, params, timeoutms)
    if resp and resp[1] then
      local result = resp[1].result
      if result and result[1] then
        local edit = result[1].edit
        vim.lsp.util.apply_workspace_edit(edit)
      end
    end

    vim.lsp.buf.formatting()
  end
EOF

autocmd BufWritePre *.go lua goimports(1000)

(Taken from the discussion on Neovim issue tracker.)

Omnifunc

To make your Ctrl+x,Ctrl+o work, add this to your init.vim:

autocmd FileType go setlocal omnifunc=v:lua.vim.lsp.omnifunc

Additional Links

Neovim's official LSP documentation.

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