vim-shfmt/shfmt.vim

   1 " 4 indents, Space between redirects, Indented case statements, Simplified
   2 let g:shfmt_extra_args = '-i 4 -sr -ci -s'
   3 let g:shfmt_fmt_on_save = 1
   4
   5 augroup LocalShell
   6     autocmd!
   7
   8     autocmd BufWritePre *.sh,*.bash Shfmt
   9 augroup END