nvim/lua/user/lsp/mason.lua

local servers = {
	"sumneko_lua",
	"cssls",
	"html",
	"tsserver",
	"pyright",
	"bashls",
	"jsonls",
	"yamlls",
	"rust_analyzer",
	"gopls",
}

local settings = {
	ui = {
		border = "none",
		icons = {
			package_installed = "◍",
			package_pending = "◍",
			package_uninstalled = "◍",
		},
	},
	log_level = vim.log.levels.INFO,
	max_concurrent_installers = 4,
}

require("mason").setup(settings)
require("mason-lspconfig").setup({
	ensure_installed = servers,
	automatic_installation = false,
})

local lspconfig_status_ok, lspconfig = pcall(require, "lspconfig")
if not lspconfig_status_ok then
	return
end

local opts = {}

for _, server in pairs(servers) do
	opts = {
		on_attach = require("user.lsp.handlers").on_attach,
		capabilities = require("user.lsp.handlers").capabilities,
	}

	server = vim.split(server, "@")[1]

	local require_ok, conf_opts = pcall(require, "user.lsp.settings." .. server)
	if require_ok then
		opts = vim.tbl_deep_extend("force", conf_opts, opts)
	end

	lspconfig[server].setup(opts)
end

local mason_nvim_dap_ok, mason_nvim_dap = pcall(require, "mason-nvim-dap")
if mason_nvim_dap_ok then
    local dap = require('dap')
	mason_nvim_dap.setup({
		automatic_setup = true,
	})
	mason_nvim_dap.setup_handlers({
		function(source_name)
			-- all sources with no handler get passed here

			-- Keep original functionality of `automatic_setup = true`
			require("mason-nvim-dap.automatic_setup")(source_name)
		end,
		python = function(source_name)
			dap.adapters.python = {
				type = "executable",
				command = "/usr/bin/python3",
				args = {
					"-m",
					"debugpy.adapter",
				},
			}

			dap.configurations.python = {
				{
					type = "python",
					request = "launch",
					name = "Launch file",
					program = "${file}", -- This configuration will launch the current file if used.
				},
			}
		end,
	})
end