nvim/lua/commands.lua

-- commands.lua

vim.cmd 'autocmd BufRead,BufNewFile *.wiki,*.md,*.tex set wrap'

vim.cmd 'au BufRead,BufNewFile *.kdl set filetype=kdl'

vim.cmd [[autocmd BufWritePre * lua vim.lsp.buf.format()]]

vim.cmd 'command W :execute \':silent w !sudo tee % > /dev/null\' | :edit!'

-- Array of file names indicating root directory. Modify to your liking.
local root_names = { '.git', 'Makefile' }

-- Cache to use for speed up (at cost of possibly outdated results)
local root_cache = {}

local set_root = function()
	-- Get directory path to start search from
	local path = vim.api.nvim_buf_get_name(0)
	if path == '' then return end
	path = vim.fs.dirname(path)

	-- Try cache and resort to searching upward for root directory
	local root = root_cache[path]
	if root == nil then
		local root_file = vim.fs.find(root_names, { path = path, upward = true })[1]
		if root_file == nil then return end
		root = vim.fs.dirname(root_file)
		root_cache[path] = root
	end

	-- Set current directory
	vim.fn.chdir(root)
end

local root_augroup = vim.api.nvim_create_augroup('MyAutoRoot', {})
vim.api.nvim_create_autocmd('BufEnter', { group = root_augroup, callback = set_root })