Mapping to include undo breakpoint <c-g>u before completion

[GNRSN]

I want to insert undo breakpoints when performing a completion so it's easy to go return when e.g. selecting the wrong snippet.

My current solution looks like this, utilzing an autocommand to combine vim mapping and calling lua func

vim.api.nvim_create_user_command("CmpComplete", function()
  if cmp.visible() then
    cmp.mapping.confirm({
      behavior = cmp.ConfirmBehavior.Insert,
      select = true,
    })()
  end
end, {})

vim.keymap.set("i", "<c-i>", "<c-g>u<cmd>CmpComplete<CR>", {})

Any advice on a more ellegant way on achiveing this? E.g. though the mapping option? I couldn't find a way to create breakpoints from lua myself.

[fitrh]

I think in your cmp mapping you can do something like this

mapping = {
  ['<C-i>'] = cmp.mapping({
    i = function(fallback)
      if cmp.visible() then
        local CTRLg_u = vim.api.nvim_replace_termcodes('<C-g>u', true, true, true)
        vim.api.nvim_feedkeys(CTRLg_u, 'n', true)
        return cmp.confirm({
          behavior = cmp.ConfirmBehavior.Insert,
          select = true,
        })
      end

      fallback()
    end,
  }),
}

[GNRSN]

Thank you, I did not know about feedkeys. This works great!!