Vimscript autocmd to lua

Lua
1

Hey, what is the exact lua equivalent to this autocmd?

 augroup lsp_document_format
       autocmd! * <buffer>
       autocmd BufWritePre <buffer> lua vim.lsp.buf.format()
 augroup END

Thanks! (:

2

somthing like this

    vim.api.nvim_create_autocmd("BufWritePre", {
		callback = function() vim.lsp.buf.format() end,
		group = vim.api.nvim_create_augroup("lsp_document_format", {clear = true})
	})

Where did you stuck?

3

I wanted to attach an autocmd to a buffer. In my lsp configuration, I have this on_attach(client, bufnr) function and I want to create an autocmd in it like this:

    local grp = vim.api.nvim_create_augroup("lsp_document_format", { clear = true })
    local autocmd = vim.api.nvim_create_autocmd

    autocmd("BufWritePre", {
        callback = function()
            if client.supports_method("textDocument/formatting") then
                vim.lsp.buf.format()
            else
                vim.schedule(function()
                    print('No formatter')
                end)
            end
        end,
        group = grp
    })

My problem is this: If when I launch neovim, the first buffer I save doesn’t have a formatter (python for example) then all the buffers I open afterwards, including the ones that do (lua for example) will display the same message. On the contrary if the first buffer I save has one then all the buffers I open afterwards will execute vim.lsp.buf.format().
I don’t really know why. I thought maybe the problem was that the autocmd was not " attached " to the buffer.
Thank you very much for you help!

4

There is a buffer for the nvim_create_autocmd. You can set buffer = 0 for the current buffer, so it will run only in this buffer.

if client.supports_method("textDocument/formatting") then
	vim.api.nvim_create_autocmd("BufWritePre", {
		callback = function() vim.lsp.buf.format() end,
		group = vim.api.nvim_create_augroup("lsp_document_format", {clear = true})
		buffer = 0
	})
end
5

It’s exactly what I was looking for. Thanks!