Echo filename before deleting buffer

Question

I would like to echo the filename before deleting any buffer (:bd, :q). I wanted to achieve this by using auto-commands like this:

augroup DummyCodeGroup
    autocmd!
    autocmd BufDelete * lua print("path", vim.fn.expand('%:p'))
augroup END

But it seems like nothing is printed (just the "path" path). When I am just executing the following:

:lua print("path", vim.fn.expand('%:p'))

Then the right path is printed on the message line.

How can I achieve this? Should I use BufUnload instead as that's called before the BufDelete?

Answer 1

It is written under :h BufDelete

NOTE: Current buffer "%" may be different from the buffer being deleted

And the same holds for about a half of auto-commands in Vim. Therefore, it must be vim.fn.expand("<afile>:p") instead.

I would like to echo the filename before deleting any buffer (:bd, :q).

Note that BufDelete is only triggered before the option buflisted being switched to nobuflisted. See this topic for a more detailed explanation.