neovim-config/lua/plugins/null-ls-nvim.lua

local null_ls = require("null-ls")

-- From: https://github.com/jose-elias-alvarez/null-ls.nvim/wiki/Formatting-on-save
local async_formatting = function(bufnr)
	bufnr = bufnr or vim.api.nvim_get_current_buf()

	vim.lsp.buf_request(
		bufnr,
		"textDocument/formatting",
		vim.lsp.util.make_formatting_params({}),
		function(err, res, ctx)
			if err then
				local err_msg = type(err) == "string" and err or err.message
				-- you can modify the log message / level (or ignore it completely)
				vim.notify("formatting: " .. err_msg, vim.log.levels.WARN)
				return
			end

			-- don't apply results if buffer is unloaded or has been modified
			if not vim.api.nvim_buf_is_loaded(bufnr) or vim.api.nvim_buf_get_option(bufnr, "modified") then
				return
			end

			if res then
				local client = vim.lsp.get_client_by_id(ctx.client_id)
				vim.lsp.util.apply_text_edits(res, bufnr, client and client.offset_encoding or "utf-16")
				vim.api.nvim_buf_call(bufnr, function()
					vim.cmd("silent noautocmd update")
				end)
			end
		end
	)
end

local augroup = vim.api.nvim_create_augroup("LspFormatting", {})

null_ls.setup({
	-- thallada: broken
	-- on_attach = function(client, bufnr)
	-- 	if client.supports_method("textDocument/formatting") then
	-- 		vim.api.nvim_clear_autocmds({ group = augroup, buffer = bufnr })
	-- 		vim.api.nvim_create_autocmd("BufWritePost", {
	-- 			group = augroup,
	-- 			buffer = bufnr,
	-- 			callback = function()
	-- 				async_formatting(bufnr)
	-- 			end,
	-- 		})
	-- 	end
	-- end,
	sources = {
		-- Linter
		-- null_ls.builtins.diagnostics.eslint_d,
		-- null_ls.builtins.diagnostics.jsonlint,
		null_ls.builtins.diagnostics.markdownlint,
		null_ls.builtins.diagnostics.stylelint,
		null_ls.builtins.diagnostics.tidy,
		null_ls.builtins.diagnostics.todo_comments,
		null_ls.builtins.diagnostics.tsc,
		null_ls.builtins.diagnostics.fish,
		null_ls.builtins.diagnostics.codespell,
		-- Formatter
		null_ls.builtins.formatting.eslint_d,
		null_ls.builtins.formatting.markdownlint,
		-- null_ls.builtins.formatting.prettierd,
		null_ls.builtins.formatting.sqlfluff.with({
			extra_args = { "--dialect", "postgres" },
		}),
		null_ls.builtins.formatting.stylua,
		null_ls.builtins.formatting.rustfmt,
		null_ls.builtins.formatting.tidy,
		null_ls.builtins.formatting.taplo,
		-- Refactoring
		-- null_ls.builtins.code_actions.refactoring,
		-- Shells
		-- Git
		null_ls.builtins.code_actions.gitsigns,
	},
})