h.vim

let g:histignore = '^buf:^history'
function! s:h(commandline)
  call histdel(':', '^H\s')
  let oldhist=&history
  try
    if len(filter(split(g:histignore, ':'), 'a:commandline =~ v:val')) == 0
      call histadd(':', a:commandline)
    endif
    set history=0
    exe a:commandline
  catch
    echohl ErrorMsg | echomsg v:exception | echohl None
  finally
    let &history=oldhist
    unlet oldhist
  endtry
endfunction
command! -nargs=+ H call s:h(<q-args>)