dotfiles/dot_config/nvim/lua/lsp.lua

require("mason").setup({
  ui = {
    border = "none",
    icons = {
      package_installed = " ",
      package_pending = " ",
      package_uninstalled = " ",
    },
  },
})
require("mason-lspconfig").setup({ automatic_installation = true })

vim.opt.completeopt = "menu,menuone,noselect"

local present, cmp = pcall(require, "cmp")
if not present or not cmp then
  vim.pretty_print("cmp not found")
  return
end

cmp.setup({
  snippet = {
    expand = function(args)
      vim.fn["vsnip#anonymous"](args.body)
    end,
  },
  window = {
    completion = cmp.config.window.bordered(),
    documentation = cmp.config.window.bordered(),
  },
  mapping = cmp.mapping.preset.insert({
    ["<Tab>"] = cmp.mapping(function(fallback)
      -- This little snippet will confirm with tab, and if no entry is selected, will confirm the first item
      if cmp.visible() then
        local entry = cmp.get_selected_entry()
        if not entry then
          cmp.select_next_item({ behavior = cmp.SelectBehavior.Select })
        else
          cmp.confirm()
        end
      else
        fallback()
      end
    end, { "i", "s", "c" }),
  }),
  sources = cmp.config.sources({
    { name = "nvim_lsp" },
    { name = "vsnip" },
    { name = "vim-dadbod-completion" },
  }, {
    { name = "buffer" },
  }),
})

cmp.setup.filetype("gitcommit", {
  sources = cmp.config.sources({
    { name = "cmp_git" },
  }, {
    { name = "buffer" },
  }),
})

cmp.setup.cmdline({ "/", "?" }, {
  mapping = cmp.mapping.preset.cmdline(),
  sources = {
    { name = "buffer" },
  },
})

cmp.setup.cmdline(":", {
  mapping = cmp.mapping.preset.cmdline(),
  sources = cmp.config.sources({
    { name = "path" },
  }, {
    { name = "cmdline" },
  }),
})

local capabilities = require("cmp_nvim_lsp").default_capabilities(
  vim.lsp.protocol.make_client_capabilities()
)
---@diagnostic disable-next-line: unused-local
local on_attach = function(client, bufnr)
  -- Enable completion triggered by <c-x><c-o>
  vim.api.nvim_buf_set_option(bufnr, "omnifunc", "v:lua.vim.lsp.omnifunc")

  -- Mappings.
  -- See `:help vim.lsp.*` for documentation on any of the below functions
  local bufopts = { noremap = true, silent = true, buffer = bufnr }
  vim.keymap.set("n", "gD", vim.lsp.buf.declaration, bufopts)
  vim.keymap.set("n", "gd", vim.lsp.buf.definition, bufopts)
  vim.keymap.set("n", "K", vim.lsp.buf.hover, bufopts)
  vim.keymap.set("n", "gi", vim.lsp.buf.implementation, bufopts)
  vim.keymap.set("n", "<C-k>", vim.lsp.buf.signature_help, bufopts)
  vim.keymap.set("n", "<space>wa", vim.lsp.buf.add_workspace_folder, bufopts)
  vim.keymap.set("n", "<space>wr", vim.lsp.buf.remove_workspace_folder, bufopts)
  vim.keymap.set("n", "<space>wl", function()
    print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
  end, bufopts)
  vim.keymap.set("n", "<space>D", vim.lsp.buf.type_definition, bufopts)
  vim.keymap.set("n", "<space>rn", vim.lsp.buf.rename, bufopts)
  vim.keymap.set("n", "<space>ca", vim.lsp.buf.code_action, bufopts)
  vim.keymap.set("n", "gr", vim.lsp.buf.references, bufopts)
end
local lspconfig = require("lspconfig")

lspconfig.gopls.setup({
  capabilities = capabilities,
  on_attach = on_attach,
})

lspconfig.sumneko_lua.setup({
  capabilities = capabilities,
  on_attach = on_attach,
  settings = {
    Lua = {
      workspace = {
        -- Make the server aware of Neovim runtime files
        library = vim.api.nvim_get_runtime_file("", true),
        checkThirdParty = false,
        maxPreload = 100000,
        preloadFileSize = 10000,
      },
      diagnostics = {
        globals = { "vim" }, -- Get the server to recognize the `vim` global
      },
      telemetry = {
        enable = false,
      },
    },
  },
})
lspconfig["emmet_ls"].setup({
  capabilities = capabilities,
  on_attach = on_attach,
  filetypes = {
    "javascriptreact",
    "typescriptreact",
    "html",
    "svelte",
    "css",
    "less",
    "sass",
    "scss",
  },
})
-- attach tsserver only when there's a 'package.json' file in the CWD
lspconfig.tsserver.setup({
  capabilities = capabilities,
  on_attach = on_attach,
  root_dir = lspconfig.util.root_pattern("package.json"),
})
-- attach deno only when there's a 'deps.ts' file in the CWD
lspconfig.denols.setup({
  capabilities = capabilities,
  on_attach = on_attach,
  root_dir = lspconfig.util.root_pattern("deps.ts"),
  single_file_support = false,
})

local null = require("null-ls")
local augroup = vim.api.nvim_create_augroup("LspFormatting", {})

null.setup({
  sources = {
    null.builtins.formatting.gofmt,
    null.builtins.formatting.stylua,
    null.builtins.formatting.stylua,
    null.builtins.formatting.deno_fmt,
  },
  on_attach = function(client, bufnr)
    if client.supports_method("textDocument/formatting") then
      vim.api.nvim_clear_autocmds({ group = augroup, buffer = bufnr })
      vim.api.nvim_create_autocmd("BufWritePre", {
        group = augroup,
        buffer = bufnr,
        callback = function()
          vim.lsp.buf.format({ bufnr = bufnr })
        end,
      })
    end
  end,
})

local toggle_formatters = function()
  null.toggle({ methods = null.methods.FORMATTING })
end

vim.api.nvim_create_user_command("ToggleFormatters", toggle_formatters, {})

local cmp_autopairs = require("nvim-autopairs.completion.cmp")
cmp.event:on("confirm_done", cmp_autopairs.on_confirm_done())