Fixed https://github.com/amix/vimrc/issues/246

vimrcs/extended.vim

@@ -108,6 +108,41 @@ iab xdate <c-r>=strftime("%d/%m/%y %H:%M:%S")<cr>
 autocmd FileType css set omnifunc=csscomplete#CompleteCSS
 
 
+"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+" => Ack searching and cope displaying
+"    requires ack.vim - it's much better than vimgrep/grep
+"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+" Use the the_silver_searcher if possible (much faster than Ack)
+if executable('ag')
+  let g:ackprg = 'ag --vimgrep --smart-case'
+endif
+
+" When you press gv you Ack after the selected text
+vnoremap <silent> gv :call VisualSelection('gv', '')<CR>
+
+" Open Ack and put the cursor in the right position
+map <leader>g :Ack 
+
+" When you press <leader>r you can search and replace the selected text
+vnoremap <silent> <leader>r :call VisualSelection('replace', '')<CR>
+
+" Do :help cope if you are unsure what cope is. It's super useful!
+"
+" When you search with Ack, display your results in cope by doing:
+"   <leader>cc
+"
+" To go to the next search result do:
+"   <leader>n
+"
+" To go to the previous search results do:
+"   <leader>p
+"
+map <leader>cc :botright cope<cr>
+map <leader>co ggVGy:tabnew<cr>:set syntax=qf<cr>pgg
+map <leader>n :cn<cr>
+map <leader>p :cp<cr>
+
+
 
 """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
 " => Helper functions
@@ -135,3 +170,28 @@ endfunc
 func! CurrentFileDir(cmd)
     return a:cmd . " " . expand("%:p:h") . "/"
 endfunc
+
+function! CmdLine(str)
+    exe "menu Foo.Bar :" . a:str
+    emenu Foo.Bar
+    unmenu Foo
+endfunction 
+
+function! VisualSelection(direction, extra_filter) range
+    let l:saved_reg = @"
+    execute "normal! vgvy"
+
+    let l:pattern = escape(@", "\\/.*'$^~[]")
+    let l:pattern = substitute(l:pattern, "\n$", "", "")
+
+    if a:direction == 'gv'
+        call CmdLine("Ack '" . l:pattern . "' " )
+    elseif a:direction == 'replace'
+        call CmdLine("%s" . '/'. l:pattern . '/')
+    endif
+
+    let @/ = l:pattern
+    let @" = l:saved_reg
+endfunction
+
+