How to use null-ls formatter by default

[siduck]

Hi , im unable to make null-ls formatting work by default for tsserver ( :lua vim.lsp.buf.formatting() )

It prompts me this message :

I tried disabling the tsserver and it worked if I ran the vim.lsp.buf.formatting command manually but my keybind for formatting didnt work

 lspconfig.tsserver.setup {
      on_attach = function(client)
         client.resolved_capabilities.document_formatting = false
      end,
   }

The keybind does work for other languages

[jose-elias-alvarez]

Assuming buf_set_keymap is just a wrapper for vim.api.nvim_buf_set_keymap, your keybind is working fine on my end with the following minimal configuration (loaded directly in init.lua after setting up plugins):

local lspconfig = require("lspconfig")
local null_ls = require("null-ls")

lspconfig.tsserver.setup({
    on_attach = function(client, bufnr)
        client.resolved_capabilities.document_formatting = false
        vim.api.nvim_buf_set_keymap(bufnr, "n", "<space>fm", "<cmd>lua vim.lsp.buf.formatting()<CR>", {})
    end,
})

null_ls.config({
    debug = true,
    sources = { null_ls.builtins.formatting.prettier },
})
lspconfig["null-ls"].setup({})

On my end, this makes formatting default to null-ls for tsserver filetypes. Does this work for you? If so, the issue might be with your config (lazy loading?).

[siduck]

yea that works! thanks :)

[benjamineskola]

I'd just like to add for reference that client.resolved_capabilities is now deprecated (I'm getting a warning for it in Neovim v0.8.0, at least), and the appropriate replacement appears to be client.server_capabilities; so client.resolved_capabilities.document_formatting = false becomes client.server_capabilities.documentFormattingProvider = false. (The switch from snake case to camel case tripped me up at first.)

[joshpetit]

You're the best for posting about how to fix after the change :)

[Pkcarreno]

besides what @benjamineskola said, vim.lsp.buf.formatting is also deprecated, it was replaced by vim.lsp.buf.format.

so the command would look like vim.api.nvim_buf_set_keymap(bufnr, "n", "<space>fm", "<cmd>lua vim.lsp.buf.format()<CR>", {}).

[Raagh]

just as an extra, I had to do lua vim.lsp.buf.format({async = true}) if not the formatting would timeout on big files

[Pkcarreno]

Thanks for that