Automatically setup Mason installed tools with null-ls?

[poperigby]

I'd like to have mason-null-ls.nvim automatically setup tools I installed with Mason. I can do this pretty easily with LSP servers. Can I do this with null-ls supported tools?

[jay-babu]

I'd like to have mason-null-ls.nvim automatically setup tools I installed with Mason. I can do this pretty easily with LSP servers. Can I do this with null-ls supported tools?

Do you mind explaining this more or sending some examples of this?

[jay-babu]

also, works without sources specified

[poperigby]

Weird. My formatter isn't working if I don't specify it in sources.

[poperigby]

@jayp0521 Do you mind sharing your whole config so I can copy it and see what I'm doing wrong?

[jay-babu]

Sorry for the late reply. been tied up at work

https://github.com/jayp0521/mason-null-ls.nvim/blob/main/lua/mason-null-ls/init.lua#L68-L75

Based on this code, you must have the tools you want installed before calling setup_handlers. Do you have this? Could be why it is working. I no longer have the code I tested with. I can re-create it. just want to confirm the above

[jay-babu]

mason_example.zip

here is my example

sorry for the color. this is default neovim

[jay-babu]

https://github.com/jayp0521/mason-null-ls.nvim#setup-handlers-usage

Feature Exists. Marking as Solution

[poperigby]

@jayp0521 Sorry for taking so long. I see that you just added the automatic_setup option. Should that do what I want? I have the option enabled but it's not autoformatting after I removed my sources specification, and it was autoformatting before that. Here's what I have:

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

-- Mason setup
require("mason").setup({})
-- Automatically setup servers installed with mason.nvim
require("mason-lspconfig").setup_handlers({
	-- The first entry (without a key) will be the default handler
	-- and will be called for each installed server that doesn't have
	-- a dedicated handler.
    function(server_name) -- default handler (optional)
		lspconfig[server_name].setup({})
	end,
	-- Next, you can provide targeted overrides for specific servers.
	["sumneko_lua"] = function()
		lspconfig.sumneko_lua.setup({
			settings = {
				Lua = {
					diagnostics = {
						globals = { "vim", "minetest" },
					},
				},
			},
		})
	end,
})

-- null-ls
require("null-ls").setup({
	-- Format on save
	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,
						filter = function(client)
							return client.name == "null-ls"
						end,
					})
				end,
			})
		end
	end,
})

-- Mason null-ls
require("mason-null-ls").setup({
	automatic_setup = true,
})

-- Fix for multiple offset encoding error
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities.offsetEncoding = { "utf-16" }
require("lspconfig").clangd.setup({ capabilities = capabilities })

[jay-babu]

-- Mason null-ls
require("mason-null-ls").setup({
	automatic_setup = true,
})

can you try running this before null-ls setup? I forget if order matters in this plugin

[jay-babu]

oh, the problem is you are not running setup_handlers

require 'mason-null-ls'.setup_handlers()

See note under: https://github.com/jayp0521/mason-null-ls.nvim#setup-handlers-usage

[poperigby]

Like this?

require("mason-null-ls").setup({
	automatic_setup = true,
})
require("mason-null-ls").setup_handlers()

I get this error from that:

Error detected while processing /home/cassidy/.config/nvim/init.lua:
E5113: Error while calling lua chunk: ...cker/start/mason-null-ls.nvim/lua/mason-null-ls/init.lua:41: attempt to index local 'handlers' (a nil value)
stack traceback:
        ...cker/start/mason-null-ls.nvim/lua/mason-null-ls/init.lua:41: in function 'setup_handlers'
        /home/cassidy/.config/nvim/lua/lsp.lua:61: in main chunk
        [C]: in function 'require'
        /home/cassidy/.config/nvim/init.lua:2: in main chunk

For the order, I have it like this:

require("mason").setup()
require("mason-lspconfig").setup_handlers()
require("null-ls").setup()
require("mason-null-ls").setup()
require("mason-null-ls").setup_handlers()

[jay-babu]

do you have the latest? line 41 is this https://github.com/jayp0521/mason-null-ls.nvim/blob/main/lua/mason-null-ls/init.lua#L41, but doesn't really align with the error you are seeing

[poperigby]

Wow, that was a stupid mistake, I forgot to update. Thank you for putting up with me haha. It's working now.