sudowrite.vim

if executable('sudo')
  function! s:save_as_root(is_bang, filename)
    if a:filename ==# ''
      let l:filename = '%'
    else
      let l:filename = a:filename
    endif
    execute 'write' . a:is_bang ' !sudo tee > /dev/null ' . l:filename
  endfunction
else
  function! s:save_as_root(is_bang, filename)
    echoerr 'sudo is not supported in this environment.'
  endfunction
endif
command! -bar -bang -nargs=? -complete=file Write  call s:save_as_root('<bang>', <q-args>)