vimscript config

If vimscript is your jam I'm going to assume you already have some experience configuring Neovim. So I'm going to show you a minimal config that you can copy to your own init.vim.

Make sure you download vim-plug (the plugin manager) before you copy this code into your config.

call plug#begin()
  Plug 'neovim/nvim-lspconfig'
  Plug 'williamboman/mason.nvim'
  Plug 'williamboman/mason-lspconfig.nvim'
  Plug 'hrsh7th/nvim-cmp'
  Plug 'hrsh7th/cmp-nvim-lsp'
  Plug 'VonHeikemen/lsp-zero.nvim', {'branch': 'v4.x'}
call plug#end()

lua <<EOF
local lsp_zero = require('lsp-zero')

local lsp_attach = function(client, bufnr)
  local opts = {buffer = bufnr}

  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

lsp_zero.extend_lspconfig({
  sign_text = true,
  lsp_attach = lsp_attach,
  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)
      vim.snippet.expand(args.body)
    end,
  },
  mapping = cmp.mapping.preset.insert({}),
})
EOF