init.lua/after/plugin/lsp.lua

local lsp = require("lsp-zero")

lsp.extend_cmp()
local cmp = require('cmp')
local cmp_select = { behavior = cmp.SelectBehavior.Select }

cmp.setup({
    window = {
        completion = cmp.config.window.bordered(),
        documentation = cmp.config.window.bordered(),
    },
    mapping = cmp.mapping.preset.insert({
        ['<C-k>'] = cmp.mapping.select_prev_item(cmp_select),
        ['<C-j>'] = cmp.mapping.select_next_item(cmp_select),
        ['<C-l>'] = cmp.mapping.confirm({ select = true }),
        ["<C-Space>"] = cmp.mapping.complete(),
        ['<Tab>'] = nil,
        ['<S-Tab>'] = nil,
    }),
    sources = {
        { name = 'nvim_lsp' },
        { name = 'buffer' },
        { name = 'path' },
        { name = 'nvim_lua' },
        { name = 'luasnip' },
    }
})

lsp.set_sign_icons({
    error = 'E',
    warn = 'W',
    hint = 'H',
    info = 'I'
})

lsp.extend_lspconfig()

lsp.on_attach(function(client, bufnr)
    local opts = { buffer = bufnr, remap = false }

    vim.keymap.set("n", "gd", function() vim.lsp.buf.definition() end, opts)
    vim.keymap.set("n", "K", function() vim.lsp.buf.hover() end, opts)
    vim.keymap.set("n", "<leader>vws", function() vim.lsp.buf.workspace_symbol() end, opts)
    vim.keymap.set("n", "<leader>vd", function() vim.diagnostic.open_float() end, opts)
    vim.keymap.set("n", "[d", function() vim.diagnostic.goto_next() end, opts)
    vim.keymap.set("n", "]d", function() vim.diagnostic.goto_prev() end, opts)
    vim.keymap.set("n", "<leader>vca", function() vim.lsp.buf.code_action() end, opts)
    vim.keymap.set("n", "<leader>vrr", function() vim.lsp.buf.references() end, opts)
    vim.keymap.set("n", "<leader>vrn", function() vim.lsp.buf.rename() end, opts)
    vim.keymap.set("i", "<C-h>", function() vim.lsp.buf.signature_help() end, opts)
end)

vim.diagnostic.config({
    virtual_text = true
})

require("mason").setup({})
require("mason-lspconfig").setup({
    ensure_installed = { 'lua_ls' },
    handlers = {
        lsp.default_setup,
    }
})