mason-lspconfig.nvim VS mason-null-ls.nvim

https://github.com/hrsh7th/nvim-cmp This is an autocompletion engine https://github.com/nvim-treesitter/nvim-treesitter This allows NeoVim to install parsing scripts so NeoVim can do things like code highlighting. https://github.com/williamboman/mason.nvim Not strictly necessary, but allows you to access a repo of LSP, install them, and configure them for without you actively messing about in config files. https://github.com/neovim/nvim-lspconfig Also not strictly necessary, but vastly simplifies LSP setup. https://github.com/williamboman/mason-lspconfig.nvim This lets the above two plugins talk to each other more easily.

pylsp offers an option to install flake8 as an optional plugin and Mason offers a command to install pylsp plugins. I could then install flake8-pytest-style via pip. Then pylsp and flake8 would live in the same Mason environment and flake8-pytest-style would live in my project's environment. I don't know if/how they will communicate with each other.

Personally, i think nvim-lint is the best alternative currently, specially so because it has no dependencies on external binaries. This guide assumes you already have your LSP set up with nvim-lspconfig (or an alternative like lsp-zero). You should also have an way to install the linters you are gonna need, i highly recommend Mason with mason-lspconfig.

Have you set up https://github.com/williamboman/mason-lspconfig.nvim as well?

You can also use https://github.com/williamboman/mason-lspconfig.nvim with nvim-lspconfig to make language server installation closer to installing a vscode extension, in that you just install a language server through mason and it'll be automatically configured for you.

https://github.com/williamboman/mason-lspconfig.nvim - Mason plugin to manage your LSP servers.

I found this GitHub issue: https://github.com/williamboman/mason-lspconfig.nvim/issues/224 I think it could be related, but I'm not sure.

LSP: lspconfig & mason-lspconfig.nvim"

I followed the default configuration with Lazy.nvim I found of the github page of mason-null-ls : https://github.com/jay-babu/mason-null-ls.nvim

I will update mason-null-ls: https://github.com/jay-babu/mason-null-ls.nvim#available-null-ls-sources. It is inaccurate since this commit. As long as the convention is followed (aka something-like in mason and something_like in null-ls) exceptions aren't needed. Exceptions live here: https://github.com/jay-babu/mason-null-ls.nvim/blob/main/lua/mason-null-ls/mappings/source.lua

You can use mason-null-ls.nvim also, is a similar bridge to the mason-lspconfig plugin. The plugin translates the server names between mason and null-ls so u just have to add the servers you want to use.

Personally I don’t use linters inside of the editor itself, but I do use formatters. For that I use null-ls which also works for linters, and allows you to configure them (eg. pass arguments to the binary) and hooks them as regular language servers, so you could look into that. The formatters can also be installed through mason but there’s also this plugin which says it’s a bridge to use mason and null-ls (I haven’t tried it, for me things just work with mason and null-ls).

Let me know your thoughts on https://github.com/jayp0521/mason-null-ls.nvim :), just updated the docs. Note: this plugin doesn't do any extra setup outside what is requested.