nix-config/home/features/coding/nvim/plugin/none-ls.lua

local null_ls = require("null-ls")
local augroup = vim.api.nvim_create_augroup("LspFormatting", {})

local opts = {
	sources = {
		-- Lua
		null_ls.builtins.formatting.stylua,
		-- Python
		null_ls.builtins.formatting.black,
		-- null_ls.builtins.diagnostics.ruff,
		-- Javascript
		-- null_ls.builtins.diagnostics.eslint_d,
		-- null_ls.builtins.diagnostics.jsonlint,
		-- C/C++
		null_ls.builtins.formatting.clang_format,
		-- Nix
		null_ls.builtins.formatting.alejandra,
		-- Rust
		-- null_ls.builtins.formatting.rustfmt,
		-- YAML
		null_ls.builtins.formatting.yamlfmt,
		-- Typescript
		null_ls.builtins.formatting.prettier.with({
			condition = function(utils)
				return utils.has_file({ ".prettierrc.js" })
			end,
		}),
	},
	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("BufWritePre", {
				group = augroup,
				buffer = bufnr,
				callback = function()
					vim.lsp.buf.format({ bufnr = bufnr })
				end,
			})
		end
	end,
}

null_ls.setup(opts)
vim.keymap.set("n", "<leader>gf", vim.lsp.buf.format, {})