Lua config

Here I will show you a fully working example configuration that you can use as your init.lua.

Expand: what's an init.lua?

Before I tell you, consider following this tutorial instead of copy/pasting this example config.

init.lua is the configuration file Neovim looks for during the initialization process.

The location of this file depends on your operating system. If you want to know where it should be located, you can execute this command in your terminal.

nvim --headless -c 'echo stdpath("config") . "\n"' -c 'quit'

Note that Neovim will not create that folder (or the init.lua file) for you. You need to do that manually.

lua

vim.opt.signcolumn = 'yes'

local lazypath = vim.fn.stdpath('data') .. '/lazy/lazy.nvim'

-- Auto-install lazy.nvim if not present
if not vim.uv.fs_stat(lazypath) then
  print('Installing lazy.nvim....')
  vim.fn.system({
    'git',
    'clone',
    '--filter=blob:none',
    'https://github.com/folke/lazy.nvim.git',
    '--branch=stable', -- latest stable release
    lazypath,
  })
  print('Done.')
end

vim.opt.rtp:prepend(lazypath)

require('lazy').setup({
  {'williamboman/mason.nvim'},
  {'williamboman/mason-lspconfig.nvim'},
  {'neovim/nvim-lspconfig'},
  {'hrsh7th/cmp-nvim-lsp'},
  {'hrsh7th/nvim-cmp'},
})

vim.api.nvim_create_autocmd('LspAttach', {
  callback = function(event)
    local opts = {buffer = event.buf}

    vim.keymap.set('n', 'K', '<cmd>lua vim.lsp.buf.hover()<cr>', opts)
    vim.keymap.set('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<cr>', opts)
    vim.keymap.set('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<cr>', opts)
    vim.keymap.set('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<cr>', opts)
    vim.keymap.set('n', 'go', '<cmd>lua vim.lsp.buf.type_definition()<cr>', opts)
    vim.keymap.set('n', 'gr', '<cmd>lua vim.lsp.buf.references()<cr>', opts)
    vim.keymap.set('n', 'gs', '<cmd>lua vim.lsp.buf.signature_help()<cr>', opts)
    vim.keymap.set('n', '<F2>', '<cmd>lua vim.lsp.buf.rename()<cr>', opts)
    vim.keymap.set({'n', 'x'}, '<F3>', '<cmd>lua vim.lsp.buf.format({async = true})<cr>', opts)
    vim.keymap.set('n', '<F4>', '<cmd>lua vim.lsp.buf.code_action()<cr>', opts)
  end,
})

local lspconfig_defaults = require('lspconfig').util.default_config
lspconfig_defaults.capabilities = vim.tbl_deep_extend(
  'force',
  lspconfig_defaults.capabilities,
  require('cmp_nvim_lsp').default_capabilities()
)

require('mason').setup({})
require('mason-lspconfig').setup({
  handlers = {
    function(server_name)
      require('lspconfig')[server_name].setup({})
    end,
  }
})

local cmp = require('cmp')

cmp.setup({
  sources = {
    {name = 'nvim_lsp'},
  },
  snippet = {
    expand = function(args)
      -- You need Neovim v0.10 to use vim.snippet
      vim.snippet.expand(args.body)
    end,
  },
  mapping = cmp.mapping.preset.insert({}),
})

Lua config ​

Lua config