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
  return
end

local has_words_before = function()
  local line, col = unpack(vim.api.nvim_win_get_cursor(0))
  return col ~= 0
    and vim.api
        .nvim_buf_get_lines(0, line - 1, line, true)[1]
        :sub(col, col)
        :match("%s")
      == nil
end

local feedkey = function(key, mode)
  vim.api.nvim_feedkeys(
    vim.api.nvim_replace_termcodes(key, true, true, true),
    mode,
    true
  )
end

cmp.setup({
  snippet = {
    expand = function(args)
      vim.fn["vsnip#anonymous"](args.body)
    end,
  },
  window = {
    completion = {
      border = { "╔", "═", "╗", "║", "╝", "═", "╚", "║" },
      winhighlight = "Normal:CmpPmenu,FloatBorder:CmpBorder,CursorLine:PmenuSel,Search:None",
    },
    documentation = {
      border = { "╔", "═", "╗", "║", "╝", "═", "╚", "║" },
      winhighlight = "Normal:CmpPmenu,FloatBorder:CmpBorder,CursorLine:PmenuSel,Search:None",
    },
  },
  mapping = cmp.mapping.preset.insert({
    ["<C-b>"] = cmp.mapping.scroll_docs(-4),
    ["<C-f>"] = cmp.mapping.scroll_docs(4),
    ["<C-Space>"] = cmp.mapping.complete(),
    ["<C-e>"] = cmp.mapping.abort(),
    ["<CR>"] = cmp.mapping.confirm({ select = true }),
    ["<Tab>"] = cmp.mapping(function(fallback)
      if cmp.visible() then
        cmp.select_next_item()
      elseif vim.fn["vsnip#available"](1) == 1 then
        feedkey("<Plug>(vsnip-expand-or-jump)", "")
      elseif has_words_before() then
        cmp.complete()
      else
        fallback() -- The fallback function sends a already mapped key. In this case, it's probably `<Tab>`.
      end
    end, { "i", "s" }),

    ["<S-Tab>"] = cmp.mapping(function()
      if cmp.visible() then
        cmp.select_prev_item()
      elseif vim.fn["vsnip#jumpable"](-1) == 1 then
        feedkey("<Plug>(vsnip-jump-prev)", "")
      end
    end, { "i", "s" }),
  }),
  sources = cmp.config.sources({
    { name = "nvim_lsp" },
    { name = "vsnip" },
    { name = "vim-dadbod-completion" },
  }, {
    { name = "buffer" },
  }),
  formatting = {
    format = require("lspkind").cmp_format({
      mode = "symbol_text",
      maxwidth = 50,
      ellipsis_char = "...",
    }),
  },
})

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", option = { trailing_slash = true } },
  }, {
    { 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", "<leader>wa", vim.lsp.buf.add_workspace_folder, bufopts)
  vim.keymap.set(
    "n",
    "<leader>wr",
    vim.lsp.buf.remove_workspace_folder,
    bufopts
  )
  vim.keymap.set("n", "<leader>wl", function()
    print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
  end, bufopts)
  vim.keymap.set("n", "<leader>D", vim.lsp.buf.type_definition, bufopts)
  vim.keymap.set("n", "<leader>rn", vim.lsp.buf.rename, bufopts)
  vim.keymap.set("n", "<leader>ca", vim.lsp.buf.code_action, bufopts)
  vim.keymap.set("n", "gr", vim.lsp.buf.references, bufopts)
  vim.keymap.set("n", "<leader>lr", "<cmd>LspRestart<CR>", bufopts)
  vim.keymap.set("n", "]d", vim.diagnostic.goto_next, bufopts)
  vim.keymap.set("n", "[d", vim.diagnostic.goto_prev, bufopts)
end
local lspconfig = require("lspconfig")

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

require("go").setup({
  disable_defaults = true,
  lsp_inlay_hints = {
    enable = true,
    -- Only show inlay hints for the current line
    only_current_line = false,
    -- Event which triggers a refersh of the inlay hints.
    -- You can make this "CursorMoved" or "CursorMoved,CursorMovedI" but
    -- not that this may cause higher CPU usage.
    -- This option is only respected when only_current_line and
    -- autoSetHints both are true.
    only_current_line_autocmd = "CursorHold",
    -- whether to show variable name before type hints with the inlay hints or not
    -- default: false
    show_variable_name = true,
    -- prefix for parameter hints
    parameter_hints_prefix = " ",
    show_parameter_hints = true,
    -- prefix for all the other hints (type, chaining)
    other_hints_prefix = "=> ",
    -- whether to align to the lenght of the longest line in the file
    max_len_align = false,
    -- padding from the left if max_len_align is true
    max_len_align_padding = 1,
    -- whether to align to the extreme right or not
    right_align = false,
    -- padding from the right if right_align is true
    right_align_padding = 6,
    -- The color of the hints
    highlight = "Comment",
  },
})

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,
})
lspconfig.ltex.setup({
  capabilities = capabilities,
  on_attach = function(client, bufnr)
    require("ltex_extra").setup({
      load_langs = { "en-US", "de-AT" },
      init_check = true,
      path = vim.fn.stdpath("data") .. "/dictionary",
    })
    on_attach(client, bufnr)
  end,
  settings = {
    ltex = {},
  },
})

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

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, {})