Wrap :retab! or create a new command that calls it?

Question

My vim does most everything what I want with :retab! one thing I would like it to do in addition is remove all trailing whitespace like this,

:%s/\s\+$//

Is there a way to redefine :retab! such that the above command runs after it. If not, can I define another function (:fixws!) that calls :retab! and the above regex?

Answer 1

I would propose:

function! Fixws()
  retab!
  %s/\s\+$//
endfunction

command! Fixws :call Fixws()

The command is :Fixws because the custom command starts with an uppercase.