Cannot load any `null-ls` source

[IamGianluca]

FAQ

• I have checked the FAQ and it didn't resolve my problem.

Issues

• I have checked existing issues and there are no issues with the same problem.

Neovim Version

0.8.0-dev

Operating System

Ubuntu 22.04

Minimal config

-- ""================================
-- """ nvim-cmp Settings
-- ""=====================================================
local cmp = require 'cmp'

cmp.setup({
	snippet = {
		-- REQUIRED - you must specify a snippet engine
		expand = function(args)
			require('luasnip').lsp_expand(args.body)
		end,
	},
	window = {
		completion = cmp.config.window.bordered(),
		documentation = cmp.config.window.bordered(),
	},
	mapping = cmp.mapping.preset.insert({
		['<C-b>'] = cmp.mapping.scroll_docs(-4),
		['<C-f>'] = cmp.mapping.scroll_docs(4),
		['<C-j>'] = cmp.mapping.select_next_item(),
		['<C-k>'] = cmp.mapping.select_prev_item(),
		['<C-Space>'] = cmp.mapping.complete(),
		['<C-e>'] = cmp.mapping.abort(),
		['<CR>'] = cmp.mapping.confirm({ select = true }),
	}),
	sources = cmp.config.sources({
		-- the order of the sources matters
		{ name = 'nvim_lua' },
		{ name = 'nvim_lsp' },
		{ name = 'path' },
		{ name = 'luasnip' },
		{ name = 'buffer' },
	}),
	experimental = {
		native_menu = false,
		ghost_text = true,
	},
})

-- Set up lspconfig
local capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities())


-- ""=====================================================
-- """ Null-ls Settings
-- ""=====================================================
require("null-ls").setup({
	sources = {
		require("null-ls").builtins.formatting.black,
	},
})

local lsp_formatting = function(bufnr)
	vim.lsp.buf.format({
		filter = function(client)
			-- apply whatever logic you want (in this example, we'll only use null-ls)
			return client.name == "null-ls"
		end,
		bufnr = bufnr,
	})
end

-- formatting on save, you can use this as a callback
local augroup = vim.api.nvim_create_augroup("LspFormatting", {})

-- add to your shared on_attach callback
local on_attach = function(client, bufnr)
	-- Enable completion triggered by <c-x><c-o>
	vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')

	-- Mappings.
	-- See `:help vim.lsp.*` for documentation on any of the below functions
	local bufopts = { noremap = true, silent = true, buffer = bufnr }
	vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, bufopts)
	vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)
	vim.keymap.set('n', 'K', vim.lsp.buf.hover, bufopts)
	vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, bufopts)
	vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, bufopts)
	vim.keymap.set('n', '<space>wa', vim.lsp.buf.add_workspace_folder, bufopts)
	vim.keymap.set('n', '<space>wr', vim.lsp.buf.remove_workspace_folder, bufopts)
	vim.keymap.set('n', '<space>wl', function()
		print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
	end, bufopts)
	vim.keymap.set('n', '<space>D', vim.lsp.buf.type_definition, bufopts)
	vim.keymap.set('n', '<space>rn', vim.lsp.buf.rename, bufopts)
	vim.keymap.set('n', '<space>ca', vim.lsp.buf.code_action, bufopts)
	vim.keymap.set('n', 'gr', vim.lsp.buf.references, bufopts)
	vim.keymap.set('n', '<space>f', vim.lsp.buf.format, bufopts)

	-- use null-ls for formatting
	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()
				lsp_formatting(bufnr)
			end,
		})
	end
end


-- ""=====================================================
-- """ Python Settings
-- ""=====================================================
require('lspconfig')['pyright'].setup {
	on_attach = on_attach,
	capabilities = capabilities
}


-- ""=====================================================
-- """ TypeScript Settings
-- ""=====================================================
require('lspconfig')['tsserver'].setup {
	on_attach = on_attach,
	-- flags = lsp_flags,
}

Steps to reproduce

Load configuration, open Python script, and try to save on save with ":w".

Expected behavior

The Python script should get formatted.

Actual behavior

Nothing changes.

Debug log

[TRACE Sat 24 Sep 2022 12:00:00 PM EDT] ....config/nvim/plugged/null-ls.nvim/lua/null-ls/client.lua:110: starting null-ls client

Help

No

Implementation help

No response

Requirements

• I have read and followed the instructions above and understand that my issue will be closed if I did not provide the required information.

[IamGianluca]

A little more context. I'm using the pyright LSP, which does not provide formatting. To work around that, I was thinking of using null-ls.

All other LSPs (rust_analyzer, tsserver, and sumnekod_lua) in my config provide formatting, so ideally, I would use null-ls only for formatting Python scripts. The config I shared does not do that, in the sense that it would use null-ls for formatting every file AFAIK.

The problem is that even using this config, no formatting happens neither on save nor after calling :lua vim.lsp.buf.format() when working on a Python file.

:lua vim.lsp.buf.format() however works for Rust and Lua files, which makes me suspect null-ls is not properly configured, or something is wrong with my configuration.

:LspInfo

Use [q] or [Esc] to quit the window
 
 Language client log: /home/gianluca/.local/state/nvim/lsp.log
 Detected filetype:   python
 
 0 client(s) attached to this buffer: 
 
 Other clients that match the filetype: python
 
 Config: pyright
 	filetypes:         python
 	root directory:    /home/gianluca/git/test
 	cmd:               pyright-langserver --stdio
 	cmd is executable: true
 	autostart:         true
 	custom handlers:   
 
 Configured servers list: rust_analyzer, pyright, tsserver, sumneko_lua

:echo executable('black')
1

[jose-elias-alvarez]

Is this a Python issue, or is this rather specific to black? This sounds like it could be related to #1020. If you see the same issue on all Python built-in sources and not just black, could you please pare down the config to the minimum required to reproduce?

[IamGianluca]

I don't think the issue is just with black. It seems I'm not able to load any of the builtins.

	null-ls
	https://github.com/jose-elias-alvarez/null-ls.nvim
	
	Supported source(s)
	* formatting: autopep8 | black | blue | isort | reorder_python_imports | usort | yapf
	* code_actions: refactoring
	* diagnostics: flake8 | mypy | pycodestyle | pydocstyle | pylama | pylint | pyproject_flake8 | semgrep | vulture
	
	* Note: current buffer has no sources attached

[jose-elias-alvarez]

Not sure I understand - you're saying that you can run formatting sources on Lua and Rust files, but not Python? Again, if you can pare down your minimal config to the bare minimum I need to reproduce the issue, I can hopefully help point out anything that might be going wrong.

[IamGianluca]

Apologies for the late reply. Didn't notice the notification.

The formatting in other languages only works because supported by the respecting LSP. In Python, since pyright doesn't support formatting and no null-ls sources are loading, I cannot get it to work.

I stripped down my configuration to only have packer, nvim-lspconfig, and null-ls.

init.lua

print("loading ~/.config/nvim/init.lua")

--=====================================================
-- Load Plugins
--=====================================================

require('plugins') -- packer
require('null')

plugins.lua

print("loading ~/.config/nvim/lua/plugins.lua")

local ensure_packer = function()
  local fn = vim.fn
  local install_path = fn.stdpath('data')..'/site/pack/packer/start/packer.nvim'
  if fn.empty(fn.glob(install_path)) > 0 then
    fn.system({'git', 'clone', '--depth', '1', 'https://github.com/wbthomason/packer.nvim', install_path})
    vim.cmd [[packadd packer.nvim]]
    return true
  end
  return false
end

local packer_bootstrap = ensure_packer()

return require('packer').startup(function(use)
  use 'wbthomason/packer.nvim'
  -- my plugins here

  -- lsp
  use { 'neovim/nvim-lspconfig' }
  use({
   "jose-elias-alvarez/null-ls.nvim",
    config = function()
        require("null-ls").setup()
    end,
    requires = { "nvim-lua/plenary.nvim" },
  })

  -- automatically set up your configuration after cloning packer.nvim
  -- put this at the end after all plugins
  if packer_bootstrap then
    require('packer').sync()
  end
end)

null.lua

--=====================================================
-- null-ls Settings
--=====================================================

require("null-ls").setup({
    sources = {
        require("null-ls").builtins.formatting.stylua,
        require("null-ls").builtins.diagnostics.eslint,
        require("null-ls").builtins.completion.spell,
    },
})

Here is an error message I get when starting nvim. I didn't see this before, but maybe it is related to my previous issues of being unable to load any null-ls source.

[IamGianluca]

I just noticed that nvim was not updated. A few weeks ago I upgraded Ubuntu from 20.04 to 22.04 and, with that, my existing ppa were commented out.

Updating nvim to the current nightly version fixed the issue!

[wom]

Just following up for those at home- had same issue after running a PackerSync with a ~3-4mo old 8-dev build. Updated to latest 9-dev and resolved.