nvim/after/plugin/lsp.lua

local lsp = require('lsp-zero')

lsp.preset("recommended")

lsp.ensure_installed({
    'bashls',
    'clangd',
    'dockerls',
    'julials',
    'lua_ls',
    'ltex',
    'pylsp',
    'texlab',
    'zls'
})

local cmp = require("cmp")
local cmp_select = { behavior = cmp.SelectBehavior.Select }
local cmp_mappings = lsp.defaults.cmp_mappings({
    ["<C-p>"] = cmp.mapping.select_prev_item(cmp_select),
    ["<C-n>"] = cmp.mapping.select_next_item(cmp_select),
    ["<C-y>"] = cmp.mapping.confirm({ select = true }),
    ["<CR>"] = cmp.mapping.confirm({ select = true }),
    ['<C-Space>'] = cmp.mapping.complete(),
})

lsp.setup_nvim_cmp({
    mapping = cmp_mappings
})

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

    vim.keymap.set("n", "gr", function() vim.lsp.buf.references() end, opts, { desc = "LSP Goto Reference"})
    vim.keymap.set("n", "gd", function() vim.lsp.buf.definition() end, opts, { desc = "LSP Goto Definition"})
    vim.keymap.set("n", "K", function() vim.lsp.buf.hover() end, opts, { desc = "LSP Hover"})
    vim.keymap.set("n", "<leader>vws", function() vim.lsp.buf.workspace_symbol() end, opts, { desc = "LSP Workspace Symbol"})
    vim.keymap.set("n", "<leader>vd", function() vim.diagnostic.setloclist() end, opts, { desc = "LSP Show Diagnostics"})
    vim.keymap.set("n", "[d", function() vim.diagnostic.goto_next() end, opts, { desc = "Next Diagnostic"})
    vim.keymap.set("n", "]d", function() vim.diagnostic.goto_prev() end, opts, { desc = "Previous Diagnostic"})
    vim.keymap.set("n", "<leader>vca", function() vim.lsp.buf.code_action() end, opts, { desc = "LSP Code Action"})
    vim.keymap.set("n", "<leader>vrr", function() vim.lsp.buf.references() end, opts, { desc = "LSP References"})
    vim.keymap.set("n", "<leader>vrn", function() vim.lsp.buf.rename() end, opts, { desc = "LSP Rename"})
    vim.keymap.set("i", "<C-h>", function() vim.lsp.buf.signature_help() end, opts, { desc = "LSP Signature Help"})
end)

--require('lspconfig').lua_ls.setup(lsp.nvim_lua_ls())
require('lspconfig').lua_ls.setup({
    settings = {
        Lua = {
            runtime = {
                -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
                version = 'LuaJIT',
            },
            diagnostics = {
                -- Get the language server to recognize the `vim` global
                globals = { 'vim' },
                neededFileStatus = {
                    ["codestyle-check"] = "Any",
                },
            },
            workspace = {
                -- Make the server aware of Neovim runtime files
                library = vim.api.nvim_get_runtime_file("", true),
            },
            -- Do not send telemetry data containing a randomized but unique identifier
            telemetry = {
                enable = false,
            },
            format = {
                enable = true,
                -- Put format options here
                -- NOTE: the value should be STRING!!
                defaultConfig = {
                    indent_style = "space",
                    indent_size = "4",
                }
            },
        },
    },
})

lsp.setup()

local cmp_action = require('lsp-zero').cmp_action()

require('luasnip.loaders.from_vscode').lazy_load()

-- `/` cmdline setup.
cmp.setup.cmdline('/', {
    mapping = cmp.mapping.preset.cmdline(),
    sources = {
        { name = 'buffer' }
    }
})

-- `:` cmdline setup.
cmp.setup.cmdline(':', {
    mapping = cmp.mapping.preset.cmdline(),
    sources = cmp.config.sources({
        { name = 'path' }
    }, {
        {
            name = 'cmdline',
            option = {
                ignore_cmds = { 'Man', '!' }
            }
        }
    })
})

cmp.setup({
    sources = {
        { name = 'nvim_lsp' },
        { name = 'luasnip', keyword_length = 2 },
        { name = 'buffer',  keyword_length = 3 },
        { name = 'path' },
    },
    mapping = {
        ['<C-f>'] = cmp_action.luasnip_jump_forward(),
        ['<C-b>'] = cmp_action.luasnip_jump_backward(),
        ['<Tab>'] = cmp_action.luasnip_supertab(),
        ['<S-Tab>'] = cmp_action.luasnip_shift_supertab(),
    },
})