How to disable autoformat on save for specific language

[RisingEdgeIndustries]

Hello,
I'm trying to disable auto format on save for a specific language (verilog using verible) but am having trouble. I add the following code to my options.lua and autocommand.lua (I've tried both places) and have had no luck.
-- Example: Disable auto-formatting for specific file types vim.api.nvim_create_autocmd("FileType", { print("Hello from autocmd.lua"), pattern = { "verilog", "Verilog", "v", "sv" }, callback = function() local filetype = vim.bo.filetype -- Skip autoformatting for specified file types if vim.tbl_contains({ "fish", "lua", "perl", "yaml" }, filetype) then vim.b.autoformat = false return end -- Apply autoformatting for other file types vim.b.autoformat = true end, group = vim.api.nvim_create_augroup("disable_autoformat", { clear = true }), })

I even stuck a print hello world message in there to see if it was working. I noticed when I open a verilog file with neo-tree I don't see the message and the autof ormatting on save is not disabled.

When I open an example verilog file from the command line using I see my hello world message but auto formatting on save still works - it is not disabled like I would expect.

I also noticed that verible might now support lua patterns:

My configuration is a fresh neovim install and then I followed the instructions to clone and run lazy.nvim. I have not modified a single thing. I'm using neovim 0.11.6 and the latest lazy.nvim posted on the website.

So I guess my questions are:

1. Am I adding the correct code to autocommands.lua file?
2. If verible (the LSP) doesn't support lua patterns is there a way to apply the "disable autoformat on save" feature for file extensions? My file extensions will all be ".v" and ".sv"?
3. In researching I also saw there may be an issue due to lazy loading as it does something with buffers before the UI loads? I am really lost at this point and don't know how to even investigate this route.

In case the code I posted isn't readable I've attached a screenshot of autocmds.lua:

Any advice is greatly appreciated!

[sharpchen]

Should post on https://github.com/LazyVim/LazyVim/discussions

---

I noticed when I open a verilog file with neo-tree I don't see the message and the autof ormatting on save is not disabled.

Try BufWinEnter event

When I open an example verilog file from the command line using I see my hello world message but auto formatting on save still works - it is not disabled like I would expect.

I don't think autoformat is relevant here.
Format on save is not a built-in feature of neovim, LazyVim must have defined an autocmd somewhere, you should find it and modify

If verible (the LSP) doesn't support lua patterns is there a way to apply

It's not related to lsp, the language server is ignorant about either your config or lua pattern.

In researching I also saw there may be an issue due to lazy loading as it does something with buffers before the UI loads?

Lazy loading only specific to plugin loading, not your isolated autocmds

---

Anyway, here's a tip you may need for a temporary workaround.
To completely disable formatting capability of verible, so you won't be able to format using verible in any approach

vim.lsp.config('verible', {
  on_attach = function(client)
    client.server_capabilities.documentFormattingProvider = false
    client.server_capabilities.documentRangeFormattingProvider = false
    client.server_capabilities.documentOnTypeFormattingProvider = nil
  end,
})

[RisingEdgeIndustries]

Would the tip you gave me turn off all formatting and messages for my verilog code? Also, would I create a .lua file in plug-ins and return a table as if I was doing a regular plug-in config?

[RisingEdgeIndustries]

@sharpchen thank you so much for the help!

For anyone else who is stuck on this, the message board here has a solution that worked for me.
https://github.com/LazyVim/LazyVim/discussions/7013