neovim/lua/plugins/lsp/lspconfig.lua

-- Install and configure nvim-lspconfig

return {
  "neovim/nvim-lspconfig",
  event = { "BufReadPre", "BufNewFile" },
  dependencies = {
    -- Send LSP results to autocompletion nvim-cmp
    "hrsh7th/cmp-nvim-lsp",
    -- Adds code actions, such as smart file renaming, etc
    { "antosha417/nvim-lsp-file-operations", config = true },
  },
  config = function()
    -- Import lsp-zero
    local lsp_zero = require("lsp-zero")

    -- Activate some functionalities when a LSP is activated to the current
    -- file
    local lsp_attach = function(_, bufnr)
      local opts = { buffer = bufnr, silent = true }

      -- Keymaps

      opts.desc = "Show LSP references"
      vim.keymap.set(
        "n",
        "gR",
        "<cmd>Telescope lsp_references<CR>",
        opts
      )

      opts.desc = "Go to declaration"
      vim.keymap.set(
        "n",
        "gD",
        vim.lsp.buf.declaration,
        opts
      )

      opts.desc = "Show LSP definitions"
      vim.keymap.set(
        "n",
        "gd",
        "<cmd>Telescope lsp_definitions<CR>",
        opts
      )

      opts.desc = "Show LSP implementations"
      vim.keymap.set(
        "n",
        "gi",
        "<cmd>Telescope lsp_implementations<CR>",
        opts
      )

      opts.desc = "Show LSP type definitions"
      vim.keymap.set(
        "n",
        "gt",
        "<cmd>Telescope lsp_type_definitions<CR>",
        opts
      )

      opts.desc = "Show LSP signature help"
      vim.keymap.set(
        "n",
        "gs",
        vim.lsp.buf.signature_help,
        opts
      )

      opts.desc = "See available code actions"
      vim.keymap.set(
        { "n", "v" },
        "<leader>ca",
        vim.lsp.buf.code_action,
        opts
      )

      opts.desc = "Smart rename"
      vim.keymap.set(
        "n",
        "<leader>rn",
        vim.lsp.buf.rename,
        opts
      )

      opts.desc = "Show buffer diagnostics"
      vim.keymap.set(
        "n",
        "<leader>D",
        "<cmd>Telescope diagnostics bufnr=0<CR>",
        opts
      )

      opts.desc = "Show line diagnostics"
      vim.keymap.set(
        "n",
        "<leader>d",
        vim.diagnostic.open_float,
        opts
      )

      opts.desc = "Go to previous diagnostic"
      vim.keymap.set("n", "[d", function()
        vim.diagnostic.jump({ count = -1, float = true })
      end, opts) -- jump to previous diagnostic in buffer

      opts.desc = "Go to next diagnostic"
      vim.keymap.set("n", "]d", function()
        vim.diagnostic.jump({ count = 1, float = true })
      end, opts) -- jump to next diagnostic in buffer

      opts.desc = "Show documentation for what is under cursor"
      vim.keymap.set(
        "n",
        "K",
        vim.lsp.buf.hover,
        opts
      )

      opts.desc = "Format buffer"
      vim.keymap.set(
        { "n", "x" },
        "F",
        "<cmd>lua vim.lsp.buf.format({async = true})<cr>",
        opts
      )

      opts.desc = "Restart LSP"
      vim.keymap.set(
      "n",
      "<leader>rs",
      ":LspRestart<CR>",
      opts
    )
    end

    lsp_zero.extend_lspconfig({
      -- Display diagnostic signs in the sign column
      sign_text = true,
      -- Attach the keymap function 
      lsp_attach = lsp_attach,
      -- Extend the default completion capabilities by LSP suggestions
      capabilities = require("cmp_nvim_lsp").default_capabilities(),
    })

    -- Use lsp_zero to configure interface 
    lsp_zero.ui({
      float_border = "rounded",
      sign_text = {
        error = " ",
        warn = " ",
        hint = "󰠠 ",
        info = " ",
      },
    })
  end,
}