With vim and vim-airline, I've got a situation where I want to be able to close a buffer if it exist, and if not close vim.
So I've first remmapped :x to ;x for speed reasons.
nnoremap : ;
Then I mapped ;x to close the buffers opened with vim-airline
nnoremap :x :bp <BAR> bd #<CR>
Now the issue is when I finally close all the buffers, I can't use ;x to quit vim.
Is there any way to check if a buffer exist in vim-airline and close it? Saw this post but its more for NERDTree.
The problem: nnoremap : ; will change the : key to invoke the original value of the ; command, i.e. skip to the next character matched by f, F, t or T. If you want to use ;x, you need to remap the reverse: nnoremap ; :.
nnoremap :x ... will then use the original value of : for :x, so everything should work fine. Alternately, and less safely, you could do nmap ;x ... to invoke the redefined value of : (and potentially a redefined value of x as well, if you specified map! x, cmap x, lmap x, or their non-recursive variants).
Also, :bd will not close the Vim, only the buffer and a window. If you're on your last buffer, you get dumped into a new unnamed buffer (like with :enew). To close buffer or Vim, use :q, that's what it's for.
(Also, I don't understand what you meant by "buffer exist in vim-airline". Airline is a status bar plugin. Buffers either exist or not. The two have nothing to do with each other, at least not in a way that is obvious to me.)