Show Only the File Name and Not the Full Path

[amarakon]

environment

• neovim: 0.7.2
• vim-airline: latest git master
• OS: Gentoo GNU/Linux
• Have you reproduced with a minimal vimrc: yes
• What is your airline configuration: I configured the tabline. See more below.
  if you are using terminal:
• terminal: alacritty
• $TERM variable: alacritty
• color configuration (:set t_Co?): Key code not set
  if you are using Neovim:
• does it happen in Vim: yes

actual behavior

It shows the path to the file you are editing instead of just the name of the file, unless you were already in that directory before editing the file.

expected behavior

Add an option to only show the file name and exclude the directories. I did this in the tabline by using this option:

let g:airline#extensions#tabline#formatter = 'unique_tail'