nvim-ufo.rc.lua

local status, ufo = pcall(require, "ufo")
if (not status) then return end

vim.o.foldcolumn = '1' -- '0' is not bad
vim.o.foldlevel = 99   -- Using ufo provider need a large value, feel free to decrease the value
vim.o.foldlevelstart = 99
vim.o.foldenable = true

-- Using ufo provider need remap `zR` and `zM`. If Neovim is 0.6.1, remap yourself
vim.keymap.set('n', 'zR', require('ufo').openAllFolds)
vim.keymap.set('n', 'zM', require('ufo').closeAllFolds)


-- Option 2: nvim lsp as LSP client
-- Tell the server the capability of foldingRange,
-- Neovim hasn't added foldingRange to default capabilities, users must add it manually
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities.textDocument.foldingRange = {
  dynamicRegistration = false,
  lineFoldingOnly = true
}
local language_servers = require("lspconfig").util.available_servers() -- or list servers manually like {'gopls', 'clangd'}
for _, ls in ipairs(language_servers) do
  require('lspconfig')[ls].setup({
    capabilities = capabilities
    -- you can add other fields for setting up lsp server in this table
  })
end

ufo.setup()