Codespell does not return diagnostic with `--count`flag

FAQ

[X] I have checked the FAQ and it didn't resolve my problem.

Issues

[X] I have checked existing issues and there are no issues with the same problem.

Neovim Version

0.10.0

Dev Version?

[ ] I am using a stable Neovim release version, or if I am using a dev version of Neovim I have confirmed that my issue is reproducible on a stable version.

Operating System

WSL2 Ubuntu 22.04

Minimal Config

-- this template is borrowed from nvim-lspconfig
local on_windows = vim.loop.os_uname().version:match("Windows")

local function join_paths(...)
    local path_sep = on_windows and "\\" or "/"
    local result = table.concat({ ... }, path_sep)
    return result
end

vim.g.loaded_remote_plugins = ""
vim.cmd([[set runtimepath=$VIMRUNTIME]])

local temp_dir = vim.loop.os_getenv("TEMP") or "/tmp"

vim.cmd("set packpath=" .. join_paths(temp_dir, "nvim", "site"))

local package_root = join_paths(temp_dir, "nvim", "site", "pack")
local install_path = join_paths(package_root, "packer", "start", "packer.nvim")
local compile_path = join_paths(install_path, "plugin", "packer_compiled.lua")

local null_ls_config = function()
    local null_ls = require("null-ls")
    -- add only what you need to reproduce your issue
    null_ls.setup({
        sources = {
          null_ls.builtins.diagnostics.codespell.with({extra_args = { "--count" }}),
          -- null_ls.builtins.diagnostics.codespell.with({extra_args = {  }}),
        },
        debug = true,
    })
end

local function load_plugins()
    -- only add other plugins if they are necessary to reproduce the issue
    require("packer").startup({
        {
            "wbthomason/packer.nvim",
            {
                "nvimtools/none-ls.nvim",
                requires = { "nvim-lua/plenary.nvim" },
                config = null_ls_config,
            },
        },
        config = {
            package_root = package_root,
            compile_path = compile_path,
        },
    })
end

if vim.fn.isdirectory(install_path) == 0 then
    vim.fn.system({ "git", "clone", "https://github.com/wbthomason/packer.nvim", install_path })
    load_plugins()
    require("packer").sync()
else
    load_plugins()
    require("packer").sync()
end

Steps to Reproduce

Create a file with a spell error, like foo.py
```
# adn
```
Ensure codespell is available in you PATH and start neovim with nvim --clean -u minimal_init.lua foo.py.
No diagnostics are shown
Remove the "--count" argument from codespell. Re-run the steps above and the diagnostics is displayed.

Reproducibility Check

[X] I confirm that my minimal config is based on the minimal_init.lua template and that my issue is reproducible by running nvim --clean -u minimal_init.lua and following the steps above.

Expected Behavior

Diagnostics from codespell should show up in Neovim.

codespell picks configuration up from pyproject.toml, so even when --count is not listed in extra_args, but it is active in pyproject.toml the unexpected behaviour also takes place.

Actual Behavior

No diagnostic is shown.

Debug Log

[TRACE Tue Jun 18 11:15:00 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/client.lua:114: starting null-ls client [TRACE Tue Jun 18 11:15:00 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/rpc.lua:106: received LSP request for method initialize [DEBUG Tue Jun 18 11:15:00 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/client.lua:182: unable to notify client for method textDocument/didOpen (client not active): { textDocument = { uri = "file:///home/user/tmp/foo.py" } } [TRACE Tue Jun 18 11:15:00 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/rpc.lua:131: received LSP notification for method initialized [TRACE Tue Jun 18 11:15:00 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/rpc.lua:131: received LSP notification for method textDocument/didOpen [TRACE Tue Jun 18 11:15:00 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/generators.lua:21: running generators for method NULL_LS_DIAGNOSTICS_ON_OPEN [DEBUG Tue Jun 18 11:15:00 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/helpers/generator_factory.lua:329: spawning command "codespell" at /home/gzagatti/tmp with args { "--count", "-" } [TRACE Tue Jun 18 11:15:00 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/helpers/generator_factory.lua:207: error output: 1

[TRACE Tue Jun 18 11:15:00 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/helpers/generator_factory.lua:208: output: 1: # adn adn ==> and

[TRACE Tue Jun 18 11:15:00 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/diagnostics.lua:181: received diagnostics from source 1 [TRACE Tue Jun 18 11:15:00 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/diagnostics.lua:182: {} [TRACE Tue Jun 18 11:15:40 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/rpc.lua:106: received LSP request for method shutdown [TRACE Tue Jun 18 11:15:40 2024] /tmp/nvim/site/pack/packer/start/none-ls.nvim/lua/null-ls/rpc.lua:131: received LSP notification for method exit

Help

Yes, but I don't know how to start. I would need guidance

Implementation Help

Null-ls should take all the output from codespell but it only takes the last line of codespell which contains the error count. To fix this issue I would need help with collecting all the program output to then pass it to the diagnostics function.

Requirements

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

nvimtools / none-ls.nvim