Remove support for vim-dispatch

Dispatch is a great hack. It mostly works without problems if you just want
to, well, dispatch any programs.

But it has different adapters that all act a bit different, uses a blacklist
for certain escape sequences and it's not very configurable, which makes it
hard to include in other plugins.

Also because of Vim's textlock, you can't close the quickfix window that
dispatch opens, even if there are no matches at all. Consider this:

    function! s:foo()
      cclose
    endfunction

    autocmd FileType qf call s:foo()

    let &makeprg     = 'grep -Rn qu'.'ux .'
    let &errorformat = '%f:%l:%m'
    Make

This will close the quickfix window, but also jump to the first line of the
buffer and there's no way to avoid this.

If you need real async search without resorting to complicated hacks, use
Neovim instead.

README.md

@@ -25,8 +25,7 @@ _Features:_
   **findstr**
 - quick switching between grep tools
 - adding new grep tools or replacing parameters of default ones is easy
-- asynchronous search with Neovim or
-  [vim-dispatch](https://github.com/tpope/vim-dispatch)
+- asynchronous search with Neovim
 - operator for selecting search queries by motion
 - operator action is repeatable if
   [vim-repeat](https://github.com/tpope/vim-repeat) is installed
@@ -43,9 +42,6 @@ Using [vim-plug](https://github.com/junegunn/vim-plug):
 
     Plug 'mhinz/vim-grepper'
 
-    " Optional: used for asynchronous searching on Vim
-    Plug 'tpope/vim-dispatch'
-
     " Optional: used for repeating operator actions via "."
     Plug 'tpope/vim-repeat'
 

autoload/grepper.vim

@@ -4,7 +4,6 @@
 " ..ad\\f40+$':-# @=,!;%^&&*()_{}/ /4304\'""?`9$343%$ ^adfadf[ad)[(
 
 let s:options = {
-      \ 'dispatch':  0,
       \ 'quickfix':  1,
       \ 'open':      1,
       \ 'switch':    1,
@@ -143,8 +142,7 @@ function! grepper#parse_flags(args) abort
   while i < len
     let flag = args[i]
 
-    if     flag =~? '\v^-%(no)?dispatch$' | let flags.dispatch = flag !~? '^-no'
-    elseif flag =~? '\v^-%(no)?quickfix$' | let flags.quickfix = flag !~? '^-no'
+    if     flag =~? '\v^-%(no)?quickfix$' | let flags.quickfix = flag !~? '^-no'
     elseif flag =~? '\v^-%(no)?open$'     | let flags.open     = flag !~? '^-no'
     elseif flag =~? '\v^-%(no)?switch$'   | let flags.switch   = flag !~? '^-no'
     elseif flag =~? '\v^-%(no)?jump$'     | let flags.jump     = flag !~? '^-no'
@@ -202,15 +200,6 @@ endfunction
 
 " s:process_flags() {{{1
 function! s:process_flags(flags)
-  " check for vim-dispatch
-  if has('nvim') || !exists(':FocusDispatch')
-    let a:flags.dispatch = 0
-  endif
-  " vim-dispatch always uses the quickfix window
-  if a:flags.dispatch
-    let a:flags.quickfix = 1
-  endif
-
   if a:flags.cword
     let a:flags.query = s:escape_query(a:flags, expand('<cword>'))
   endif
@@ -324,17 +313,6 @@ function! s:run(flags)
           \ 'on_exit':   function('s:on_exit'),
           \ 'errmsg':    '' })
     return
-  elseif a:flags.dispatch
-    " Just a hack since autocmds can't access local variables.
-    let s:flags = deepcopy(a:flags)
-    augroup grepper
-      autocmd FileType qf call s:finish_up(s:flags)
-    augroup END
-    try
-      silent Make
-    finally
-      call s:restore_settings()
-    endtry
   else
     try
       execute 'silent' (a:flags.quickfix ? 'grep!' : 'lgrep!')
@@ -355,7 +333,7 @@ function! s:store_settings(flags) abort
   let s:settings = {}
   let prog = s:get_current_tool(a:flags)
 
-  if !has('nvim') || !a:flags.dispatch
+  if !has('nvim')
     let s:settings.t_ti = &t_ti
     let s:settings.t_te = &t_te
     set t_ti= t_te=
@@ -410,10 +388,6 @@ function! s:finish_up(flags, ...) abort
     autocmd!
   augroup END
 
-  if exists('s:flags')
-    unlet s:flags
-  endif
-
   let qf = a:flags.quickfix
   let size = len(qf ? getqflist() : getloclist(0))
 
@@ -425,9 +399,6 @@ function! s:finish_up(flags, ...) abort
   else
     if a:flags.jump
       execute (qf ? 'cfirst' : 'lfirst')
-      if a:flags.dispatch
-        doautocmd BufRead
-      endif
     endif
 
     execute (qf ? 'botright copen' : 'lopen') (size > 10 ? 10 : size)
@@ -444,19 +415,14 @@ function! s:finish_up(flags, ...) abort
     nnoremap <silent><buffer> t    <c-w>gFzv
     nmap     <silent><buffer> T    tgT
 
-    if a:flags.dispatch
-      if a:flags.switch
-        call feedkeys("\<c-w>p", 'n')
-      endif
-    else
-      if !a:flags.open
-        execute (qf ? 'cclose' : 'lclose')
-      elseif !a:flags.switch
-        call feedkeys("\<c-w>p", 'n')
-      endif
-      if !has('nvim')
-        redraw!
-      endif
+    if !a:flags.open
+      execute (qf ? 'cclose' : 'lclose')
+    elseif !a:flags.switch
+      call feedkeys("\<c-w>p", 'n')
+    endif
+
+    if !has('nvim')
+      redraw!
     endif
 
     echo printf('Found %d matches.', size)

doc/grepper.txt

@@ -38,9 +38,8 @@ supports most common grep tools, and is easily extendable.
 
 You choose a tool, enter a query, and get your matches into a |quickfix| list.
 
-If you use Neovim or vim-dispatch, the search will be executed asynchronously.
-Thus you will be able to continue editing while the grep program is still
-running.
+If you use Neovim, the search will be executed asynchronously. Thus you will
+be able to continue editing while the grep program is still running.
 
 ==============================================================================
 TOOLS                                                            *grepper-tools*
@@ -78,11 +77,7 @@ Flags:~
 -[no]switch          Switch to quickfix/location window.
 
 -[no]quickfix        Use the quickfix list. If -noquickfix is given, use the
-                     location list instead. When using -dispatch, the quickfix
-                     window will be forced.
-
--[no]dispatch        If vim-dispatch is installed, use |dispatch-:Make| for
-                     executing the query.
+                     location list instead.
 
 -[no]prompt          To prompt or not to prompt! Common uses are together with
                      -cword or -grepprg in a command.
@@ -180,9 +175,6 @@ switch       When the quickfix/location window opens, switch to it.
 
 jump         Automatically jump to the first match. Defaults to 0.
 
-dispatch     Can be used to start an async search with Vim. It uses
-             |dispatch-:Make| from vim-dispatch. Defaults to 0.
-
 prompt       To prompt or not to prompt! Defaults to 1.
 
 tools        These are the tools that you can choose between. The order