Add a count to Copen to set quickfix height

autoload/dispatch.vim

@@ -842,7 +842,12 @@ endfunction
 " }}}1
 " Quickfix window {{{1
 
-function! dispatch#copen(bang) abort
+function! dispatch#copen(bang, count) abort
+  if a:count != 0
+    let g:dispatch_temporary_quickfix_height = a:count
+  elseif has_key(g:, 'dispatch_temporary_quickfix_height')
+    unlet g:dispatch_temporary_quickfix_height
+  endif
   if empty(s:makes)
     return 'echoerr ' . string('No dispatches yet')
   endif
@@ -895,7 +900,7 @@ endfunction
 
 function! s:cwindow(request, all, copen)
   call s:cgetfile(a:request, a:all)
-  let height = get(g:, 'dispatch_quickfix_height', 10)
+  let height = get(g:, 'dispatch_temporary_quickfix_height', get(g:, 'dispatch_quickfix_height', 10))
   let was_qf = s:is_quickfix()
   execute 'botright' (a:copen ? 'copen' : 'cwindow') height
   if !was_qf && s:is_quickfix() && a:copen !=# -2

autoload/dispatch/tmux.vim

@@ -48,7 +48,7 @@ function! dispatch#tmux#make(request) abort
         \  . ' > ' . a:request.file . '.complete'] : [])))
 
   let title = shellescape(get(a:request, 'title', get(a:request, 'compiler', 'make')))
-  let height = get(g:, 'dispatch_tmux_height', get(g:, 'dispatch_quickfix_height', 10))
+  let height = get(g:, 'dispatch_tmux_height', get(g:, 'dispatch_temporary_quickfix_height', get(g:, 'dispatch_quickfix_height', 10)))
   if get(a:request, 'background', 0)
     let cmd = 'new-window -d -n '.title
   elseif has('gui_running') || empty($TMUX) || (!empty(''.session) && session !=# system('tmux display-message -p "#S"')[0:-2])

plugin/dispatch.vim

@@ -25,7 +25,7 @@ command! -bang -nargs=* -complete=customlist,dispatch#command_complete Spawn
 command! -bang -nargs=* -complete=customlist,dispatch#command_complete Start
       \ execute dispatch#start_command(<bang>0, <q-args>)
 
-command! -bang -bar Copen call dispatch#copen(<bang>0)
+command! -bang -count -bar Copen call dispatch#copen(<bang>0, <count>)
 
 function! DispatchComplete(id) abort
   return dispatch#complete(a:id)